Yamaha DX21 - Manual (Page 35)

including extremely realistic bells, explosions, etc. More even ratios are more useful
for creating musical instrument sounds. It is possible to combine a modulator set
to a fractional ratio at a low operator level with even-ratio operators to add bite
to a string sound and many other effects.
The standard DX21 keyboard pitch is 8’, therefore in terms of footage: 0.50 = 16’,
1.00 = 8’. and 2.00 = 4’.
B2: DETUNE
This parameter permits slight detuning of the selected operator in relation to the
others, making it possible to create richer, fuller voice effects. If detune is applied
to carriers, the result is a thick, multi-instrument effect. Applied to modulators the
result is a slight periodic variation in timbre— sometimes similar to a phase shift
effect.
The data range is from -7 to +7, for a maximum detuning range of plus or minus
2 cents (1/600th of an octave). At +0 no detune effect is produced.
B3-B7: ENVELOPE GENERATOR, AR, D1R, D1L, D2R, RR
These switches select the specific envelope generator parameters to be worked
on: ATTACK RATE, DELAY 1 RATE, DELAY 1 LEVEL, DELAY 2 RATE and RELEASE
RATE.
The data range for AR, D1R, and D2R is 0 to 31, with 31 being the fastest rate
(instantaneous) and 0 the slowest. RR and D1L have a data range of from 0 to
15, with 15 being maximum level and 0 being zero level for D1L
The following EG curve shows the relationship between the RATE and LEVEL
parameters.
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