Filter
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296 Glossary
01V—Owner’s Manual
Q—The unit used to express a filter’s selectivity. High values imply a narrow frequency
band, low values, a wide frequency band.
Quantization—The PCM process in which PAM pulses are approximated to the
nearest binary value available.
S/PDIF format—See Coaxial format.
Sampling rate — The number of times per second analog audio signals are sampled
(i.e., measured) during A/D conversion. Common digital audio sampling rates are
32 kHz, 44.1 kHz, and 48 kHz.
Scene memories—Memory locations used to store mix scenes. See also Mix scene.
Shelving—A type of EQ circuit used to cut and boost frequencies above or below a set
frequency. It produces a shelf-looking response curve. High and low EQs are usually of
the shelving type. Contrast with Peaking.
Signal-to-noise ratio (S/N)—In an audio system, the difference between the oper-
ating signal level and the residual noise floor expressed as a decibel ratio, commonly
used to measure a system’s noise performance.
Snapshot—See Mix scene.
ST OUT—The 01V stereo output.
System Exclusive—A type of MIDI message for exclusive use with a particular
device. See also Bulk Dump.
THD (Total Harmonic Distortion)—The measure of distortion introduced by an
audio system relative to the audio signal expressed as a percentage. Compared to
third-harmonic distortion, which is the measure of a single harmonic, total harmonic
distortion is the sum of distortions produced at all harmonics.
Unity gain—A gain of one.
Wordclock—A clock signal used to synchronize the data processing circuits of all
devices connected in a digital audio system. The wordclock frequency is the same as the
sampling rate.