Yamaha CSY-1 Manual page 9

FILTER Q
Switch the filter to manual control by putting
the filter lever in the "control" position (down).
You can now control the filter characteristics
(from lowpass to highpass, and degree of reso-
nance) with the cutoff frequency and resonance
controls.
€ P—— Ó!
ENVELOPE Ө
The term "envelope" may seem strange, however,
every sound event has an envelope. If you draw
a heavy line connecting the peaks of the sound's
waveform, you would have the event, or "en-
velope" waveform. Synthesizers employ separate
envelope generators with. a varying number cf
controls to adjust the different portions of the
envelope wave shape. The Yamaha CSY-1 preset
voices all have preset attack and sustain envelope
patterns. In the preset position, the "attack"
(the time required for a note to reach full volume)
and the length of time the note sounds (sustain
and release) are adjusted for you in advance. By
placing the envelope lever in the control position,
the preset envelope is cancelled and the variable
attack and sustain controls are now functional.
When the attack control is set to "slow", a long
rise time results. When the sustain control is set
to 'long" the tone will continue. to sound for
quite some time after the key is released. Con-
versely, when the controls are set to fast and short,
a staccato tone will result.
MÀ 7 ENVELOPE