187 APPENDIX B - GLOSSARY
Quaver
Classical term for the length of a note equal to half of a
Crotchet.
R
Rate
Speed.
Rectifier, Rectification
Type of signal processing where one half (either upper or lower)
of a signal is inverted (see “Full wave rectification” on page 181)
or zeroed (half wave rectification). The Virus offers full wave rec-
tification.
Resonance
Boosting of frequencies close to the cutoff point in a filter (origi-
nally via Feedback). This term derives from the distinctive fre-
quency “formants” caused by physical attributes of acoustic
instruments e.g. a piano or acoustic guitar.
Ring Modulator (Ringmod)
Synthesizer module which multiplies two signals, often creating
bell-like tones.
S
Sample and Hold (S+H)
A clocked processor which takes a regular sample of input lev-
els and holds this until the next clock (so the output is stepped).
Sample and Hold is a random source in the Virus LFOs because
its input is always noise.
Sample and Glide (S+G)
Sample and Hold, but smoothed.
Saturation
Usually: The smooth distortion caused by overloading a filter
input or magnetic tape.
Semiquaver
Note length: Half a Quaver, one quarter of a Crotchet.
Semitone
Pitch interval equal to one twelvth of an Octave. The keys on a
keyboard are a semitone apart.
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