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DBX (noise Reduction)
dbx is a family of Audio noise reduction, noise reduction systems developed by dbx, Inc., the company of the same name. The most common implementations are dbx Type I and dbx Type II for analog tape recording and, less commonly, vinyl Gramophone record, LPs. A separate implementation, known as dbx-TV, is part of the multichannel television sound, MTS system used to provide stereo sound to North American and certain other TV systems. The company, dbx, Inc., was also involved with Dynamic Noise Reduction (DNR) systems. History The original dbx Type I and Type II systems were based on so-called "linear decibel companding" - compressing the signal on recording and expanding it on playback. It was invented by David E. Blackmer of dbx, Inc. in 1971. A miniature dbx Type II decoder on an integrated circuit was created in 1982 for use in portable and car audio, although only a few devices took advantage of it, such as certain Panasonic portable cassette players and Sanyo car stereos. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dbx Logo 2
dbx or DBX may refer to: * dbx (debugger), a Unix source-level debugger * dbx (company), a professional audio recording equipment company ** dbx (noise reduction), a noise reduction system invented by dbx, Inc. * .dbx, the file extension for Microsoft Outlook Express data files * direct byte execution, a tagline used for Jazelle, one of the execution states found in ARM processors * DBX, annual Dropbox (service), Dropbox developer conference and NYSE ticker symbol for Dropbox * Aston Martin DBX, an automobile model In music: * DBX, the stage name of turntablist Danny Marquez, formerly of Trik Turner * DBX, an alias of American minimal techno artist Daniel Bell (musician), Daniel Bell * DBX, the Dave Brockie Experience * DBX, an English group composed of producers Pete Kirtley and Sacha Collisson, and singer-songwriter John James Newman {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tape Hiss
Tape hiss is the high frequency noise present on analogue magnetic tape recordings caused by the size of the magnetic particles used to make the tape. Effectively it is the noise floor of the recording medium. It can be reduced by the use of finer magnetic particles or by increasing the tape speed or the track width used by the recorder. A 3 dB improvement of the signal to noise ratio occurs for every doubling of the track width. A number of noise reduction techniques can be used to reduce the impact of tape hiss, including Dolby NR and DBX, or, in the case of videotape recording, frequency modulation of either the composite video signal, or the luma component. See also * Audio quality measurement * Sound recording Sound recording and reproduction is the electrical, Mechanical system, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of ... Ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Record Surface Noise
In sound and music production, sonic artifact, or simply artifact, refers to sonic material that is accidental or unwanted, resulting from the editing or manipulation of a sound. Types Because there are always technical restrictions in the way a sound can be recorded (in the case of acoustic sounds) or designed (in the case of synthesised or processed sounds), sonic errors often occur. These errors are termed artifacts (or sound/sonic artifacts), and may be pleasing or displeasing. A sonic artifact is sometimes a type of digital artifact, and in some cases is the result of data compression (not to be confused with dynamic range compression, which also may create sonic artifacts). Often an artifact is deliberately produced for creative reasons. For example to introduce a change in timbre of the original sound or to create a sense of cultural or stylistic context. A well-known example is the overdriving of an electric guitar or electric bass signal to produce a clipped, disto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LP Album
The LP (from long playing or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk. Introduced by Columbia Records in 1948, it was soon adopted as a new standard by the entire US record industry and, apart from a few relatively minor refinements and the important later addition of stereophonic sound in 1957, it remained the standard format for record albums during a period in popular music known as the album era. LP was originally a trademark of Columbia and competed against the smaller 7-inch sized "45" or "single" format by RCA Victor, eventually ending up on top. Today in the vinyl revival era, a large majority of records are based on the LP format and hence the LP name continues to be in use today to refer to new records. Format advantages At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Root Mean Square
In mathematics, the root mean square (abbrev. RMS, or rms) of a set of values is the square root of the set's mean square. Given a set x_i, its RMS is denoted as either x_\mathrm or \mathrm_x. The RMS is also known as the quadratic mean (denoted M_2), a special case of the generalized mean. The RMS of a continuous function is denoted f_\mathrm and can be defined in terms of an integral of the square of the function. In estimation theory, the root-mean-square deviation of an estimator measures how far the estimator strays from the data. Definition The RMS value of a set of values (or a continuous-time waveform) is the square root of the arithmetic mean of the squares of the values, or the square of the function that defines the continuous waveform. In the case of a set of ''n'' values \, the RMS is : x_\text = \sqrt. The corresponding formula for a continuous function (or waveform) ''f''(''t'') defined over the interval T_1 \le t \le T_2 is : f_\text = \sqrt , and the R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voltage-controlled Amplifier
A variable-gain (VGA) or voltage-controlled amplifier (VCA) is an electronic amplifier that varies its gain depending on a control voltage (often abbreviated CV). VCAs have many applications, including audio level compression, synthesizers and amplitude modulation. A crude example is a typical inverting op-amp configuration with a light-dependent resistor (LDR) in the feedback loop. The gain of the amplifier then depends on the light falling on the LDR, which can be provided by an LED (an optocoupler). The gain of the amplifier is then controllable by the current through the LED. This is similar to the circuits used in optical audio compressors. A voltage-controlled amplifier can be realised by first creating a voltage-controlled resistor (VCR), which is used to set the amplifier gain. The VCR is one of the numerous interesting circuit elements that can be produced by using a JFET (junction field-effect transistor) with simple biasing. VCRs manufactured in this way c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portastudio
Portastudio refers to a series of Multitrack recording, multitrack recorders produced by TASCAM beginning in 1979 with the introduction of the TEAC Corporation, TEAC 144, the first four-track compact cassette-based recorder. A TASCAM trademark, "portastudio" is commonly used to refer to any self-contained multitrack recorder dedicated to music production. The Portastudio is credited with launching the home recording revolution by making it possible for musicians to easily and affordably record and produce multitrack music at home and is cited as one of the most significant innovations in music production technology. History Cassette Portastudios The first Portastudio, the TEAC 144, was introduced on September 22, 1979, at the AES Convention in New York City. The 144 combined a 4-channel Mixing console, mixer with Panning (audio), pan, Treble (sound), treble, and Bass (sound), bass on each input with a cassette recorder capable of recording four tracks in one direction at 3¾ Inch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tascam
TASCAM is the professional audio division of TEAC Corporation, headquartered in Tokyo Japan. TASCAM established the Home Recording phenomenon by creating the "Project Studio" and is credited as the inventor of the Portastudio, the first cassette-based multi-track home studio recorders. TASCAM also introduced the first low-cost mass-produced multitrack recorders with Simul-Sync designed for recording musicians, and manufactured reel-to-reel tape machines and audio mixers for home recordists from the early 1970s through the mid-1990s. Since the early 00's, TASCAM has been an early innovator in the field-recording and audio accompaniment to video with their DR-series recording platforms. TASCAM celebrated its 50th anniversary in 2021. TASCAM tape Portastudios were cited by Reverb.com as one of the top used gear pieces to increase in value in 2020, with original units jumping 30-65% over their price two years prior. History TASCAM started out as a research and development gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolby Noise Reduction System
A Dolby noise-reduction system (Dolby NR) is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. The first was Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market, which helped make high fidelity practical on cassette tapes, which used a relatively noisy tape size and speed. It is common on high-fidelity stereo tape players and recorders to the present day. Of the noise reduction systems, Dolby A and Dolby SR were developed for professional use. Dolby B, C, and S were designed for the consumer market. Aside from Dolby HX, all the Dolby variants work by companding: compressing the dynamic range of the sound during recording, and expanding it during playback. Process When recording a signal on magnetic tape, there is a low level of noise in the backgrou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolby Noise-reduction System
A Dolby noise-reduction system (Dolby NR) is one of a series of audio noise reduction, noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. The first was #Dolby A, Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is #Dolby B, Dolby B (introduced in 1968), a sliding band system for the consumer market, which helped make high fidelity practical on cassette tapes, which used a relatively noisy tape size and speed. It is common on high-fidelity stereo tape players and recorders to the present day. Of the noise reduction systems, Dolby A and #Dolby SR, Dolby SR were developed for professional use. Dolby B, #Dolby C, C, and #Dolby S, S were designed for the consumer market. Aside from #Dolby HX/HX-Pro, Dolby HX, all the Dolby variants work by companding: compressing the dynamic range of the sound during recording, and expanding it during playback. Process W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll-off
Roll-off is the steepness of a transfer function with frequency, particularly in electrical network analysis, and most especially in connection with filter circuits in the transition between a passband and a stopband. It is most typically applied to the insertion loss of the network, but can, in principle, be applied to any relevant function of frequency, and any technology, not just electronics. It is usual to measure roll-off as a function of logarithmic frequency; consequently, the units of roll-off are either decibels per decade (dB/decade), where a decade is a tenfold increase in frequency, or decibels per octave (dB/8ve), where an octave is a twofold increase in frequency. The concept of roll-off stems from the fact that in many networks roll-off tends towards a constant gradient at frequencies well away from the cut-off point of the frequency curve. Roll-off enables the cut-off performance of such a filter network to be reduced to a single number. Note that roll-o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal-to-noise Ratio
Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise. SNR is an important parameter that affects the performance and quality of systems that process or transmit signals, such as communication systems, audio systems, radar systems, imaging systems, and data acquisition systems. A high SNR means that the signal is clear and easy to detect or interpret, while a low SNR means that the signal is corrupted or obscured by noise and may be difficult to distinguish or recover. SNR can be improved by various methods, such as increasing the signal strength, reducing the noise level, filtering out unwanted noise, or using error correction techniques. SNR also determines the maximum possible amount of data that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
