Yamaha Electone EL-900 Owner's Manual page 122

E nvel ope Param et ers
B y usi ng t he m odul at ors and set t i ng t hem t o vari ous out put l evel s, you
can creat e al l ki nds of sounds. T hese sounds w i l l be st at i c, how ever,
unl ess you have t he out put l evel s change i n t i m e. T hat i s preci sel y w hat
an envel ope does. It vari es t he out put of an O perat or i n t i m e so t hat you
can vary t he t one or t he l evel . If t he out put of t he m odul at or changes, t he
t one w i l l change. If t he out put l evel of t he carri er changes, t he vol um e
w i l l change.
2 3 5 6
AR D1R D2R RR
1
OUTPUT
4
LEVEL
D1L
Key on Key off
Feedback
T he out put of a m odul at or can al so be ci rcl ed back t o i t s i nput , al l ow i ng
i t t o m odul at e i t sel f as w el l as t he O perat or bel ow i t . Thi s i s cal l ed feedback,
and i t adds harm oni c com pl exi t y t o t he t one. O perat ors usi ng feedback
are i ndi cat ed by a l i ne t hat enci rcl es t he ri ght si de of t he O perat or.
Feedback cannot be di rect l y cont rol l ed; how ever, you can adj ust t he
param et ers of O perat ors t hat have feedback t o change t he charact eri st i cs
8
of t he feedback sound.
122
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