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The purpose of quantization in music processing is to provide a more beat-accurate timing of sounds. [2] Quantization is frequently applied to a record of MIDI notes created by the use of a musical keyboard or drum machine. Additionally, the phrase "pitch quantization" can refer to pitch correction used in audio production, such as using Auto-Tune.
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A PCM signal is a sequence of digital audio samples containing the data providing the necessary information to reconstruct the original analog signal.Each sample represents the amplitude of the signal at a specific point in time, and the samples are uniformly spaced in time.
Linear pulse-code modulation (LPCM) is a specific type of PCM in which the quantization levels are linearly uniform. [5] This is in contrast to PCM encodings in which quantization levels vary as a function of amplitude (as with the A-law algorithm or the μ-law algorithm ).
As the dynamic range is measured relative to the RMS level of a full scale sine wave, the dynamic range and the level of this quantization noise in dBFS can both be estimated with the same formula (though with reversed sign):
Since around 1989, 1-bit delta-sigma modulators have been used in analog-to-digital converters.This involves sampling the audio at a very high rate (2.8224 million samples per second, for example) but only using a single bit.
Computer Music Project at Carnegie Mellon University, Roger B. Dannenberg Yes Yes Yes Yes Pure Data: Pd Community, Miller Puckette: Yes Yes Yes Yes BSD-3-Clause: Sonic Pi: Sam Aaron Yes Yes ? Yes MIIT SuperCollider: SuperCollider community, James McCartney Yes Yes Yes? Yes GPL-3.0-or-later: TidalCycles: Alex McLean et al Yes Yes Yes Yes GPL-3.0 ...
The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint.