WMNF (88.5 MHz ) is an FM non-commercial community radio station in Tampa, Florida . It is owned by the Nathan B. Stubblefield Foundation and it airs a mix of music shows and news programming. It is supported by listener contributions and has studios on East Dr. Martin Luther King Jr. Boulevard in Tampa.
93-641: WMNF is a Class C1 FM station with an effective radiated power (ERP) of 6,650 watts . The transmitter is off Colonnade Vista Drive in Riverview, Florida . Since its inception, WMNF has had a paid staff, but most of the programming is by volunteers. WMNF has aired a wide variety of music shows, including programs featuring Adult Album Alternative (AAA), Blues , Bluegrass , Folk , Alternative Rock, Rockabilly , R&B , Soul music , Urban Gospel , Celtic music , Jazz , Salsa and Experimental music . The early WMNF schedule featured Folk and Acoustic music in
186-489: A Red Book CD; thus, the mono source material is usually presented as two identical channels in a standard Red Book stereo track (i.e., mirrored mono ); an MP3 CD , can have audio file formats with mono sound. CD-Text is an extension of the Red Book specification for an audio CD that allows for the storage of additional text information (e.g., album name, song name, artist) on a standards-compliant audio CD. The information
279-437: A personal computer hard disk drive . Several other formats were further derived, both pre-pressed and blank user writable, including write-once audio and data storage ( CD-R ), rewritable media ( CD-RW ), Video CD (VCD), Super Video CD (SVCD), Photo CD , Picture CD , Compact Disc-Interactive ( CD-i ), Enhanced Music CD , and Super Audio CD (SACD) which may have a CD-DA layer. The optophone , first presented in 1913,
372-469: A 150-minute playing time, 44,056 Hz sampling rate, 16-bit linear resolution, and cross-interleaved Reed-Solomon coding (CIRC) error correction code —specifications similar to those later settled upon for the standard compact disc format in 1980. Technical details of Sony's digital audio disc were presented during the 62nd AES Convention, held on 13–16 March 1979, in Brussels . Sony's AES technical paper
465-573: A 50,000 watt maximum for the US and Canada, but no maximum for other governments in the region. Mexico, for example, typically runs 150,000 to 500,000 watts, but some stations are grandfathered at 10,000 to 20,000 watts at night; by treaty, these sub-50,000 watt Mexican stations may operate with a maximum of 100,000 watts during the daytime. Because the AM broadcast band developed before technology suitable for directional antennas , there are numerous exceptions, such as
558-597: A CD. VCDs are playable in dedicated VCD players, most modern DVD-Video players, personal computers, and some video game consoles. The VCD standard was created in 1993 by Sony, Philips, Matsushita , and JVC and is referred to as the White Book standard. Overall picture quality is intended to be comparable to VHS video. Poorly compressed VCD video can sometimes be of lower quality than VHS video, but VCD exhibits block artifacts rather than analog noise and does not deteriorate further with each use. 352×240 (or SIF ) resolution
651-476: A critical role in the present and future of WMNF. This event, unfortunately, has reinforced the value of WMNF and the impact we have in the local community, particularly in regards to News and Public Affairs. It also has heightened our commitment to support the Tampa Bay community and to give a voice to the under-served.” On April 15, 2019 WMNF's General Manager Craig Kopp resigned and noted the community’s reaction to
744-419: A diameter of 120 mm (4.7 in), and are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650 MiB ( 681,574,400 bytes) of data. Capacity is routinely extended to 80 minutes and 700 MiB ( 734,003,200 bytes), 90 minutes 800 MiB ( 838,860,800 bytes), or 99 minutes 870 MiB ( 912,261,120 bytes) by arranging data more closely on
837-475: A diameter of 20 cm (7.9 in) and a sound quality superior to that of the vinyl record. However, due to the unsatisfactory performance of the analog format, two Philips research engineers recommended a digital format in March 1974. In 1977, Philips then established a laboratory with the mission of creating a digital audio disc. The diameter of Philips's prototype compact disc was set at 11.5 cm (4.5 in),
930-417: A disc played from beginning to end slows its rotation rate during playback. The program area is 86.05 cm and the length of the recordable spiral is 86.05 cm / 1.6 μm = 5.38 km. With a scanning speed of 1.2 m/s, the playing time is 74 minutes or 650 MiB of data on a CD-ROM. A disc with data packed slightly more densely is tolerated by most players (though some old ones fail). Using
1023-460: A few Class B stations with grandfathered power limits in excess of 50 KW, such as WETA (licensed for Washington DC in zone I, at a power of 75 kW ERP), WNCI ( Columbus, Ohio in zone I, at 175 kW ERP), KPFK (Los Angeles in zone I-A, at 110 KW ERP), and the most extreme example being WBCT ( Grand Rapids, Michigan , in zone I, at 320 kW ERP). Notes: All full-power analog television station transmissions in
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#17328555886851116-400: A former member of the task force, gives background information on the many technical decisions made, including the choice of the sampling frequency, playing time, and disc diameter. The task force consisted of around 6 persons, though according to Philips, the compact disc was "invented collectively by a large group of people working as a team". Early milestones in the launch and adoption of
1209-465: A graphics signal (typically, the CD+G player is hooked up to a television set or a computer monitor); these graphics are almost exclusively used to display lyrics on a television set for karaoke performers to sing along with. The CD+G format takes advantage of the channels R through W. These six bits store the graphics information. CD + Extended Graphics (CD+EG, also known as CD+XG) is an improved variant of
1302-553: A joint task force of engineers to design a new digital audio disc. Led by engineers Kees Schouhamer Immink and Toshitada Doi , the research pushed forward laser and optical disc technology. After a year of experimentation and discussion, the task force produced the Red Book CD-DA standard. First published in 1980, the standard was formally adopted by the IEC as an international standard in 1987, with various amendments becoming part of
1395-453: A linear velocity of 1.2 m/s and a narrower track pitch of 1.5 μm increases the playing time to 80 minutes, and data capacity to 700 MiB. Even denser tracks are possible, with semi-standard 90 minute/800 MiB discs having 1.33 μm, and 99 minute/870 MiB having 1.26 μm, but compatibility suffers as density increases. A CD is read by focusing a 780 nm wavelength ( near infrared ) semiconductor laser through
1488-426: A longtime popular DJ on Tampa Bay commercial radio, joined the show as a cohost. The Friday drive-time high-energy presentation of post WW2 blues, country and gospel is a station highlight. In 2022, WUSF discontinued evening and overnight jazz programming to the dismay of area jazz fans. WMNF recruited WUSF’s longtime former jazz director Bob Seymour to present a Monday evening jazz show on WMNF. Jazz fans have embraced
1581-469: A malfunctioning CD writer . Error scanning can reliably predict data losses caused by media deterioration. Support of error scanning differs between vendors and models of optical disc drives , and extended error scanning (known as "advanced error scanning" in Nero DiscSpeed ) has only been available on Plextor and some BenQ optical drives so far, as of 2020. The digital data on a CD begins at
1674-606: A new digital audio disc. After a year of experimentation and discussion, the Red Book CD-DA standard was published in 1980. After their commercial release in 1982, compact discs and their players were extremely popular. Despite costing up to $ 1,000, over 400,000 CD players were sold in the United States between 1983 and 1984. By 1988, CD sales in the United States surpassed those of vinyl LPs, and, by 1992, CD sales surpassed those of prerecorded music-cassette tapes. The success of
1767-888: A speaking engagement at the University of South Florida . On February 18, 2019, WMNF posted that they ended their "long-running relationship with News Director Rob Lorei" and for more information to "contact General Manager Craig Kopp." Rob Lorei filed a grievance with the station’s board of directors. There was a "public outcry" with "some supporters canceled donations" and within the first few days comments from listeners and supporters "poured in at station meetings, and online via WMNF’s social media bulletin board" Josh Holton, former WMNF board member and previous supporter of Craig Kopp wrote that he would no longer support him due to “the completely inappropriate manner in which he has handled this monumentally catastrophic decision, which has hurt our budget, our brand and our reputation.” On March 18, 2019,
1860-498: A station of this type shares the callsign of another station. In analog, these services often were broadcast on the same or adjacent channels to their parent station, except in certain areas with tight packing of television stations (such as central Mexico). In digital, these services usually operate on the same RF channel as their parent station, except for those with conflicting full-power applications ( XHBS-TDT Cd. Obregón, Son., channel 30 instead of 25), in certain other cases where it
1953-522: A vacated church on Nebraska Avenue in Tampa in 1981. WMNF was originally powered at 70,000 watts but on a much shorter tower. When its tower tripled in height in 2007, its power was reduced but still with better coverage. WMNF holds periodic on-air fundraisers and seeks donations and volunteers on its website. Its supporters account for approximately 70% of its funding. There are three pledge drives each year. The station has paid operations staff, but most of
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#17328555886852046-460: A variation of this technique called pulse-density modulation (PDM), while Matsushita (now Panasonic ) chose pulse-width modulation (PWM), advertising it as MASH, which is an acronym derived from their patented Multi-stAge noiSe-sHaping PWM topology. The CD was primarily planned as the successor to the vinyl record for playing music, rather than as a data storage medium. However, CDs have grown to encompass other applications. In 1983, following
2139-451: A worm gear is used, a second shorter-throw linear motor, in the form of a coil and magnet, makes fine position adjustments to track eccentricities in the disk at high speed. Some CD drives (particularly those manufactured by Philips during the 1980s and early 1990s) use a swing arm similar to that seen on a gramophone. The pits and lands do not directly represent the 0s and 1s of binary data . Instead, non-return-to-zero, inverted encoding
2232-407: Is debatable whether Russell's concepts, patents, and prototypes instigated and in some measure influenced the compact disc's design. The compact disc is an evolution of LaserDisc technology, where a focused laser beam is used that enables the high information density required for high-quality digital audio signals. Unlike the prior art by Optophonie and James Russell, the information on the disc
2325-499: Is described in a document produced in 1980 by the format's joint creators, Sony and Philips. The document is known colloquially as the Red Book CD-DA after the color of its cover. The format is a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate per channel. Four-channel sound was to be an allowable option within the Red Book format, but has never been implemented. Monaural audio has no existing standard on
2418-464: Is divided into three zones for FM broadcasting: I, I-A and II. The zone where a station is located may limit the choices of broadcast class available to a given FM station. Zone I in the US includes all of Connecticut , the District of Columbia , Delaware , Illinois , Indiana , Massachusetts , Maryland , New Jersey , Ohio , Pennsylvania , Rhode Island , and West Virginia . It also includes
2511-474: Is licensed for two watts in digital. The highest-powered shadows are XEQ-TDT Toluca and XHBS-TDT Ciudad Obregón, both at 200 kW. The United States Federal Communications Commission lists the following services on their website for television broadcasting: Compact Disc The compact disc ( CD ) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. It uses
2604-407: Is playable in standard CD players, thus making them backward compatible. CD- MIDI is a format used to store music-performance data, which upon playback is performed by electronic instruments that synthesize the audio. Hence, unlike the original Red Book CD-DA, these recordings are not digitally sampled audio recordings. The CD-MIDI format is defined as an extension of the original Red Book . For
2697-510: Is protected by a film of lacquer normally spin coated directly on the reflective layer. The label is printed on the lacquer layer, usually by screen printing or offset printing . CD data is represented as tiny indentations known as pits , encoded in a spiral track molded into the top of the polycarbonate layer. The areas between pits are known as lands . Each pit is approximately 100 nm deep by 500 nm wide, and varies from 850 nm to 3.5 μm in length. The distance between
2790-514: Is read from a reflective layer using a laser as a light source through a protective substrate. Prototypes were developed by Philips and Sony independently in the late 1970s. Although originally dismissed by Philips Research management as a trivial pursuit, the CD became the primary focus for Philips as the LaserDisc format struggled. In 1979, Sony and Philips set up a joint task force of engineers to design
2883-599: Is still considered LPTV with respect to stations in Canada and Mexico. Class-A stations (US) (suffix: -CA or -CD for digital class A): The class-A television class is a variant of LPTV created in 2000 by the FCC to allocate and protect some low-power affiliates. Class-A stations are still low-power, but are protected from RF interference and from having to change channel should a full-service station request that channel. Additionally, class-A stations, LPTV stations, and translators are
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2976-432: Is stored either in the lead-in area of the CD, where there are roughly five kilobytes of space available or in the subcode channels R to W on the disc, which can store about 31 megabytes. Compact Disc + Graphics is a special audio compact disc that contains graphics data in addition to the audio data on the disc. The disc can be played on a regular audio CD player, but when played on a special CD+G player, it can output
3069-513: Is technically not feasible ( XHAW-TDT Guadalupe, NL, channel 26 instead of 25) or to make way for eventual repacking on upper UHF ( XHPNW-TDT has four shadows on 33, its post-repacking channel, instead of 39). Equipos complementarios can relay their parent station, or a station that carries 75% or more of the same programming as its parent station. Stations of either type may have unusually low or high effective radiated powers. XHSMI-TDT in Oaxaca
3162-408: Is used: a change from either pit to land or land to pit indicates a 1, while no change indicates a series of 0s. There must be at least two, and no more than ten 0s between each 1, which is defined by the length of the pit. This, in turn, is decoded by reversing the eight-to-fourteen modulation used in mastering the disc, and then reversing the cross-interleaved Reed–Solomon coding , finally revealing
3255-477: The Compact Disc + Graphics (CD+G) format. Like CD+G, CD+EG uses basic CD-ROM features to display text and video information in addition to the music being played. This extra data is stored in subcode channels R-W. Very few CD+EG discs have been published. Super Audio CD (SACD) is a high-resolution, read-only optical audio disc format that was designed to provide higher-fidelity digital audio reproduction than
3348-641: The Compact Disc Digital Audio format which typically provides 74 minutes of audio on a disc. In later years, the compact disc was adapted for non-audio computer data storage purposes as CD-ROM and its derivatives. First released in Japan in October 1982, the CD was the second optical disc technology to be invented, after the much larger LaserDisc (LD). By 2007, 200 billion CDs (including audio CDs, CD-ROMs and CD-Rs) had been sold worldwide. Standard CDs have
3441-512: The Red Book . Introduced in 1999, it was developed by Sony and Philips, the same companies that created the Red Book . SACD was in a format war with DVD-Audio , but neither has replaced audio CDs. The SACD standard is referred to as the Scarlet Book standard. Titles in the SACD format can be issued as hybrid discs; these discs contain the SACD audio stream as well as a standard audio CD layer which
3534-535: The Sunday Simcha , a Jewish music and public affairs show that still airs on Sundays at 2pm. The music library can store approximately 100,000 CDs , and has about 8,000 record albums. In 2007, WMNF moved to a higher antenna tower at 469 meters (1539 feet) in height above average terrain (HAAT). The signal stretches from Clearwater and Bradenton to Lakeland and Fort Meade . In 1997, Florida State Senator John Grant zeroed out $ 104,000 in state funding from
3627-763: The US-Canada or US-Mexico border must get approval by both the domestic and foreign agency. These agencies are Industry Canada / Canadian Radio-television and Telecommunications Commission (CRTC) in Canada, the Federal Communications Commission (FCC) in the US, and the Federal Telecommunications Institute (IFT) in Mexico. All domestic (United States) AM stations are classified as A , B , C , or D . Notes: AM station classes were previously assigned Roman numerals from I to IV in
3720-752: The vinyl revival . During the 2010s, the increasing popularity of solid-state media and music streaming services caused automakers to remove automotive CD players in favor of minijack auxiliary inputs, wired connections to USB devices and wireless Bluetooth connections. Automakers viewed CD players as using up valuable space and taking up weight which could be reallocated to more popular features, like large touchscreens. By 2021, only Lexus and General Motors were still including CD players as standard equipment with certain vehicles. CDs continued to be strong in some markets such as Japan where 132 million units were produced in 2019. The decline in CD sales has slowed in recent years; in 2021, CD sales increased in
3813-712: The 120 mm size was adopted. The adoption of EFM in June 1980 allowed 30 percent more playing time that would have resulted in 97 minutes for 120 mm diameter or 74 minutes for a disc as small as 100 millimetres (3.9 in). Instead, the information density was lowered by 30 percent to keep the playing time at 74 minutes. The 120 mm diameter has been adopted by subsequent formats, including Super Audio CD , DVD , HD DVD , and Blu-ray Disc. The 80-millimetre (3.1 in) diameter discs (" Mini CDs ") can hold up to 24 minutes of music or 210 MiB. The logical format of an audio CD (officially Compact Disc Digital Audio or CD-DA)
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3906-601: The 2000s designed as successors to the CD: the Super Audio CD (SACD) and DVD-Audio . However neither of these were adopted partly due to increased relevance of digital (virtual) music and the apparent lack of audible improvements in audio quality to most human ears. These effectively extended the CD's longevity in the music market. With the advent and popularity of Internet-based distribution of files in lossy-compressed audio formats such as MP3 , sales of CDs began to decline in
3999-502: The 2000s. For example, between 2000 and 2008, despite overall growth in music sales and one anomalous year of increase, major-label CD sales declined overall by 20%. Despite rapidly declining sales year-over-year, the pervasiveness of the technology lingered for a time, with companies placing CDs in pharmacies, supermarkets, and filling station convenience stores to target buyers less likely to be able to use Internet-based distribution. In 2012, CDs and DVDs made up only 34% of music sales in
4092-477: The Board of Directors of WMNF posted a statement which said that they would "reinstate Rob to his role as News & Public Affairs Director at WMNF." David Harbeitner (President of the Board of Directors of WMNF) shared that: The Board has reached the decision to reinstate Rob to his role as News and Public Affairs director at WMNF. We believe that both Rob and Craig Kopp, the station general manager, can and should play
4185-467: The CD's introduction, Immink and Joseph Braat presented the first experiments with erasable compact discs during the 73rd AES Convention . In June 1985, the computer-readable CD-ROM (read-only memory) and, in 1990, recordable CD-R discs were introduced. Recordable CDs became an alternative to tape for recording and distributing music and could be duplicated without degradation in sound quality. Other newer video formats such as DVD and Blu-ray use
4278-472: The DAC. Even when using high-precision components, this approach was prone to decoding errors. Another issue was jitter , a time-related defect. Confronted with the instability of DACs, manufacturers initially turned to increasing the number of bits in the DAC and using several DACs per audio channel, averaging their output. This increased the cost of CD players but did not solve the core problem. A breakthrough in
4371-403: The US for the first time since 2004, with Axios citing its rise to "young people who are finding they like hard copies of music in the digital age". It came at the same time as both vinyl and cassette reached sales levels not seen in 30 years. The RIAA reported that CD revenue made a dip in 2022, before increasing again in 2023 and overtook downloading for the first time in over a decade. In
4464-630: The US use of 800 (kHz) and 900 non-directionally in Alaska, limited to 5 kW at night; and 1050 and 1220, directionally, in the continental US , and without time limits; each of these being assigned to specific cities (and each of these being Mexican Class I-A clear channels). In return for these limits on US stations, Mexico accepted limits on 830 and 1030 in Mexico City, non-directionally, restricted to 5 kW at night (both of these being US Class I-A clear channels). Notes: The following table lists
4557-439: The US were terminated at midnight Eastern Daylight Time on June 12, 2009. Many broadcasters replaced their analog signal with their digital ATSC signal on the same transmission channel at that time. Notes: LPTV (secondary) (suffix: -LP, or a sequential-numbered callsign in format W##XX with no suffix for analog or with -D suffix for digital, or -LD for low-power digital stations): The LPTV (low-power television) service
4650-517: The US, 33.4 million CD albums were sold in the year 2022. In France in 2023, 10.5 million CDs were sold, almost double that of vinyl, but both of them represented generated 12% each of the French music industry revenues. Sony and Philips received praise for the development of the compact disc from professional organizations. These awards include: A CD is made from 1.2-millimetre (0.047 in) thick, polycarbonate plastic, and weighs 14–33 grams. From
4743-801: The US, with subclasses indicated by a letter suffix. Current class A is equivalent to the old class I; class B is the old classes II and III, with class D being the II-D, II-S, and III-S subclasses; and class C is the old class IV. The following conversion table compares the old AM station classes with the new AM station classes: The following chart lists frequencies on the broadcast company band, and which classes broadcast on these frequencies; Class A and Class B , 10,000 watt and higher (full-time) stations in North America which broadcast on clear-channel station frequencies are also shown. By international agreement, Class A stations must be 10,000 watts and above, with
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#17328555886854836-665: The United States. By 2015, only 24% of music in the United States was purchased on physical media, two thirds of this consisting of CDs; however, in the same year in Japan, over 80% of music was bought on CDs and other physical formats. In 2018, U.S. CD sales were 52 million units—less than 6% of the peak sales volume in 2000. In the UK, 32 million units were sold, almost 100 million fewer than in 2008. In 2018, Best Buy announced plans to decrease their focus on CD sales, however, while continuing to sell records, sales of which are growing during
4929-560: The WMNF app. 27°49′12″N 82°15′40″W / 27.820°N 82.261°W / 27.820; -82.261 List of broadcast station classes This is a list of broadcast station classes applicable in much of North America under international agreements between the United States, Canada and Mexico. Effective radiated power (ERP) and height above average terrain (HAAT) are listed unless otherwise noted. All radio and television stations within 320 kilometers (199 miles) of
5022-541: The annual budget, citing his displeasure at the lyrics of a song he had heard broadcast ( Iris DeMent 's "Wasteland of the Free"). In response to the shortfall, the station staged an emergency fundraiser that took in $ 122,000 in a day and a half. Then Program Director Randy Wynne indicated his belief that such difficulties arose after WMNF aired several criticisms against State Senator Grant's opposition to Olympic gold medalist diver and outspoken LGBTQ activist Greg Louganis attending
5115-458: The antenna site," based on the determined noise-limited bounding contour. All digital television stations in Mexico have -TDT callsign suffixes. Analog stations, which existed until December 31, 2016, had -TV callsign suffixes. The equivalent of low power or translator service in Mexico is the equipo complementario de zona de sombra , which is intended only to fill in gaps between a station's expected and actual service area caused by terrain;
5208-579: The areas south of latitude 43.5°N in Michigan , New Hampshire , New York, and Vermont ; as well as coastal Maine , southeastern Wisconsin , and northern and eastern Virginia . Zone I-A includes California south of 40°N, as well as Puerto Rico and the US Virgin Islands . Zone II includes the remainder of the continental US , plus Alaska and Hawaii . In Zones I and I-A, there are no Class C, C0, or C1 stations. However, there are
5301-406: The bottom of the polycarbonate layer. The change in height between pits and lands results in a difference in the way the light is reflected. Because the pits are indented into the top layer of the disc and are read through the transparent polycarbonate base, the pits form bumps when read. The laser hits the disc, casting a circle of light wider than the modulated spiral track reflecting partially from
5394-451: The center of the disc and proceeds toward the edge, which allows adaptation to the different sizes available. Standard CDs are available in two sizes. By far, the most common is 120 millimetres (4.7 in) in diameter, with a 74-, 80, 90, or 99-minute audio capacity and a 650, 700, 800, or 870 MiB (737,280,000-byte) data capacity. Discs are 1.2 millimetres (0.047 in) thick, with a 15 millimetres (0.59 in) center hole. The size of
5487-407: The center outward, components are: the center spindle hole (15 mm), the first-transition area (clamping ring), the clamping area (stacking ring), the second-transition area (mirror band), the program (data) area, and the rim. The inner program area occupies a radius from 25 to 58 mm. A thin layer of aluminum or, more rarely, gold is applied to the surface, making it reflective. The metal
5580-450: The compact disc has been credited to the cooperation between Philips and Sony, which together agreed upon and developed compatible hardware. The unified design of the compact disc allowed consumers to purchase any disc or player from any company and allowed the CD to dominate the at-home music market unchallenged. In 1974, Lou Ottens, director of the audio division of Philips, started a small group to develop an analog optical audio disc with
5673-423: The diagonal of an audio cassette. Heitaro Nakajima , who developed an early digital audio recorder within Japan's national public broadcasting organization, NHK , in 1970, became general manager of Sony's audio department in 1971. In 1973, his team developed a digital PCM adaptor that made audio recordings using a Betamax video recorder. After this, in 1974 the leap to storing digital audio on an optical disc
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#17328555886855766-406: The entire market share in regard to US music sales . The CD is considered the last dominant audio format of the album era , as the rise of MP3 , iTunes , cellular ringtones , and other downloadable music formats in the mid-2000s ended the decade-long dominance of the CD. The format was later adapted (as CD-ROM ) for general purpose data storage and initially could hold much more data than
5859-400: The firing and re-hiring of Rob Lorei as a reason, alone with "anti-Semitic and other ‘toxic’ comments made" Craig Kopp wrote: “I love WMNF as a concept and have dedicated myself to setting it up to continue far into the future ... But the reinstatement of Rob Lorei assures that it will remain firmly rooted in the past.” In 2021, 43-year station veteran Rob Lorei was terminated by WMNF. Lorei,
5952-508: The first few years of its existence, the CD was a medium used purely for audio. In 1988, the Yellow Book CD-ROM standard was established by Sony and Philips, which defined a non-volatile optical data computer data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. Video CD (VCD, View CD, and Compact Disc digital video) is a standard digital format for storing video media on
6045-458: The first four UK albums by the Beatles were released in mono on compact disc. The growing acceptance of the CD in 1983 marks the beginning of the popular digital audio revolution. It was enthusiastically received, especially in the early-adopting classical music and audiophile communities, and its handling quality received particular praise. As the price of players gradually came down, and with
6138-419: The first hip hop show in the area, The Kenny K Wax Attack, which aired on Saturdays at midnight. An Arbitron rating showed 42% of radio listeners under 25 were listening to Kenny K. Saturday late night remains hip hop programming as of May 2024. In 2014, WMNF added to the schedule, "The Rhythm Revival," hosted by nationally known recording artist/music historian Reverend Billy C. Wirtz. In 2021, Marvelous Marvin,
6231-804: The format included: The first artist to sell a million copies on CD was Dire Straits , with their 1985 album Brothers in Arms . One of the first CD markets was devoted to reissuing popular music whose commercial potential was already proven. The first major artist to have their entire catalog converted to CD was David Bowie , whose first fourteen studio albums (up to Scary Monsters (and Super Creeps) ) of (then) sixteen were made available by RCA Records in February 1985, along with four greatest hits albums; his fifteenth and sixteenth albums ( Let's Dance and Tonight , respectively) had already been issued on CD by EMI Records in 1983 and 1984, respectively. On 26 February 1987,
6324-522: The hole was chosen by Joop Sinjou and based on a Dutch 10-cent coin: a dubbeltje . Philips/Sony patented the physical dimensions. The official Philips history says the capacity was specified by Sony executive Norio Ohga to be able to contain the entirety of Beethoven's Ninth Symphony on one disc. This is a myth according to Kees Immink , as the EFM code format had not yet been decided in December 1979, when
6417-479: The host of Radioactivity with Rob Lorei , which aired weekdays at 11 a.m. Over three months later WMNF stated in a letter that Rob Lorei used an "ethnic slur towards a listener from a station email account." Rob Lorei denied using 'an ethnic slur' and said he used a 'political term' in a reply to a listener who wrote it to "downplay the dangers of the Proud Boys." Will Greaves, WMNF Board President, disagrees and said
6510-461: The hosts and pledge drive workers are volunteers. In 2005, WMNF moved into new state of the art studios and production space financed by listener donations. The facility is located adjacent to the old studio which was demolished and now serves as a parking lot. The new facility is over 12,000 square feet (1,100 m) with three broadcast studios, two production studios and a live performance studio named in memory of Mike Eisenstadt, longtime host of
6603-505: The introduction of the portable Discman , the CD began to gain popularity in the larger popular and rock music markets. With the rise in CD sales, pre-recorded cassette tape sales began to decline in the late 1980s; CD sales overtook cassette sales in the early 1990s. In 1988, 400 million CDs were manufactured by 50 pressing plants around the world. Early CD players employed binary-weighted digital-to-analog converters (DAC), which contained individual electrical components for each bit of
6696-476: The label side of the disc. Scratches on the clear side can be repaired by refilling them with similar refractive plastic or by careful polishing. The edges of CDs are sometimes incompletely sealed, allowing gases and liquids to enter the CD and corrode the metal reflective layer and/or interfere with the focus of the laser on the pits, a condition known as disc rot . The fungus Geotrichum candidum has been found—under conditions of high heat and humidity—to consume
6789-510: The lands and partially from the top of any bumps where they are present. As the laser passes over a pit (bump), its height means that the round trip path of the light reflected from its peak is 1/2 wavelength out of phase with the light reflected from the land around it. This is because the height of a bump is around 1/4 of the wavelength of the light used, so the light falls 1/4 out of phase before reflection and another 1/4 wavelength out of phase after reflection. This causes partial cancellation of
6882-419: The laser's reflection from the surface. By measuring the reflected intensity change with a photodiode , a modulated signal is read back from the disc. To accommodate the spiral pattern of data, the laser is placed on a mobile mechanism within the disc tray of any CD player. This mechanism typically takes the form of a sled that moves along a rail. The sled can be driven by a worm gear or linear motor . Where
6975-428: The late 1980s culminated in development of the 1-bit DAC , which converts high-resolution low-frequency digital input signal into a lower-resolution high-frequency signal that is mapped to voltages and then smoothed with an analog filter. The temporary use of a lower-resolution signal simplified circuit design and improved efficiency, which is why it became dominant in CD players starting from the early 1990s. Philips used
7068-550: The long-running music shows are: The Sixties Show, Gospel Classic Hour, The Soul Party and The Freak Show . Past public affairs programs included RadioActivity and The Women's Show , touching on feminist issues that first started running in the 1980s. Current long running PA shows include Art in Your Ear , Talking Animals , and True Talk, which focuses on the Middle East and the global issues Muslims face. In 1986, WMNF began
7161-640: The morning; Big Band and Nostalgia midday; Jazz Blues and Reggae in the afternoon; and Bluegrass in afternoon drivetime. Gospel, Soul, Jewish, Sixties, Celtic and New Wave filled evenings and the weekend. In the nineties the station phased out Big Band and Nostalgia and midday became filled with public affairs and talk shows, anchored by the national show Democracy Now and a daily talk show called Radioactivity hosted by News Director Rob Loeei until 2021. WMNF airs several progressive talk and news programs focused on LGBTQ issues, animal and environmental preservation and civil right, hosted mostly by volunteers. Among
7254-618: The new show "Jazz in the Night." Before going on the air the station conducted a door to door campaign to raise startup funds. The station signed on the air on September 14, 1979 ; 45 years ago ( September 14, 1979 ) . It was established by the Nathan B. Stubblefield Foundation, a non-profit organization started solely for this purpose. The Board of Directors comprises programmers, volunteers, staff, and community members. The first WMNF studios were in an old house in south Tampa, moving to
7347-427: The only stations currently authorized to broadcast both analog and digital signals, unlike full-power stations which must broadcast a digital signal only. In Canada, there is no formal transmission power below which a television transmitter is considered broadcasting at low power. Industry Canada considers that a low power digital television undertaking "shall not normally extend a distance of 20 km in any direction from
7440-533: The polycarbonate plastic and aluminium found in CDs. The data integrity of compact discs can be measured using surface error scanning , which can measure the rates of different types of data errors, known as C1 , C2 , CU and extended (finer-grain) error measurements known as E11 , E12 , E21 , E22 , E31 and E32 , of which higher rates indicate a possibly damaged or unclean data surface, low media quality, deteriorating media and recordable media written to by
7533-479: The public affairs director and show host said he was not given a reason. He told the Tampa Bay Times "No community radio station has been as consistently successful as WMNF. You'll have to ask the general manager why he terminated me." The station told the newspaper that Lorei was given the reason by the general manager and a member of the board and that it would be his choice to disclose the reason. Lorei had been
7626-538: The raw data stored on the disc. These encoding techniques (defined in the Red Book ) were originally designed for CD Digital Audio , but they later became a standard for almost all CD formats (such as CD-ROM ). CDs are susceptible to damage during handling and from environmental exposure. Pits are much closer to the label side of a disc, enabling defects and contaminants on the clear side to be out of focus during playback. Consequently, CDs are more likely to suffer damage on
7719-432: The same physical geometry as CD, and most DVD and Blu-ray players are backward compatible with audio CDs. CD sales in the United States peaked by 2000. By the early 2000s, the CD player had largely replaced the audio cassette player as standard equipment in new automobiles, with 2010 being the final model year for any car in the United States to have a factory-equipped cassette player. Two new formats were marketed in
7812-481: The same-sized disc. The Mini CD has various diameters ranging from 60 to 80 millimetres (2.4 to 3.1 in); they have been used for CD singles or delivering device drivers . The CD gained rapid popularity in the 1990s, quickly outselling all other audio formats in the United States by 1991, ending the market dominance of the phonograph record and the cassette tape . By 2000, the CD accounted for 92.3% of
7905-503: The standard in 1996. Philips coined the term compact disc in line with another audio product, the Compact Cassette , and contributed the general manufacturing process , based on video LaserDisc technology. Philips also contributed eight-to-fourteen modulation (EFM), while Sony contributed the error-correction method, CIRC, which offers resilience to defects such as scratches and fingerprints. The Compact Disc Story , told by
7998-478: The term was not a political term but rather “It was an anti-Semitic racial slur that is highly offensive to any Jewish person.” Creative Loafing Tampa Bay reported that opinions on use of the term and its 'hurtfulness' were mixed from the Jewish community. Creative Loafing Tampa Bay wrote that while "most folks agree that it was not the best choice of words ... many in the community do believe that Lorei never meant to use
8091-710: The various classes of FM stations, the reference facilities for each station class, and the protected and city grade contours for each station class: Historically, there were local "Class A" frequencies (like AM radio's class C stations) to which only class A stations would be allocated & the other frequencies could not have a class A. According to the 1982 FCC rules & regulations, those frequencies were: 92.1, 92.7, 93.5, 94.3, 95.3, 95.9, 96.7, 97.7, 98.3, 99.3, 100.1, 100.9, 101.7, 102.3, 103.1, 103.9, 104.9, 105.5, 106.3 & 107.1. Stations on those twenty frequencies were limited to having equivalent signals no greater that 3KW at 300 feet (91 meters) above average terrain. The US
8184-420: The windings (the pitch ) is 1.6 μm (measured center-to-center, not between the edges). When playing an audio CD, a motor within the CD player spins the disc to a scanning velocity of 1.2–1.4 m/s ( constant linear velocity , CLV)—equivalent to approximately 500 RPM at the inside of the disc, and approximately 200 RPM at the outside edge. The track on the CD begins at the inside and spirals outward so
8277-586: The word in an anti-semitic manner." Creative Loafing Tampa Bay says they are giving some context by referencing that Rob Lorei, in 1978, snuck into a Ku Klux Klan rally to assess how deep-seated the racism was" and how much of "a threat the KKK was to the Tampa Bay area." and in 1980 Rob Lorei helped "usher in WMNF’s first Jewish program (“The Jewish Sound,” now known as “The Sunday Simcha”)" WMNF broadcasts four HD Radio channels which are also online streams and accessible on
8370-468: Was an early device that used light for both recording and playback of sound signals on a transparent photograph . More than thirty years later, American inventor James T. Russell has been credited with inventing the first system to record digital media on a photosensitive plate. Russell's patent application was filed in 1966, and he was granted a patent in 1970. Following litigation, Sony and Philips licensed Russell's patents for recording in 1988. It
8463-490: Was created in 1982 by the FCC to allocate channels for smaller, local stations, and community channels, such as public access stations. LPTV stations that meet additional requirements such as children's " E/I " core programming and Emergency Alert System broadcasting capabilities can qualify for a Class A (-CA) license. Broadcast translators , boosters , and other LPTV stations are considered secondary to full-power stations, unless they have upgraded to class A. Class A
8556-459: Was easily made. Sony first publicly demonstrated an optical digital audio disc in September 1976. A year later, in September 1977, Sony showed the press a 30 cm (12 in) disc that could play an hour of digital audio (44,100 Hz sampling rate and 16-bit resolution) using modified frequency modulation encoding. In September 1978, the company demonstrated an optical digital audio disc with
8649-509: Was published on 1 March 1979. A week later, on 8 March, Philips publicly demonstrated a prototype of an optical digital audio disc at a press conference called "Philips Introduce Compact Disc" in Eindhoven , Netherlands. Sony executive Norio Ohga , later CEO and chairman of Sony, and Heitaro Nakajima were convinced of the format's commercial potential and pushed further development despite widespread skepticism. In 1979, Sony and Philips set up
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