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these feedback links can be utilized in combination with an computer
edit program application.
the sound and its dynamics: modulation as a function of time
The time course of the modulation depth, the modulator output level
can be precisely determined. This applies equally to the output level,
the output level of the carrier. On the Yamaha synthesizers it is shown
by means of a diagram how this variable may change over time.
In the picture above we read vertically the modulation depth. We see
the horizontal time axis, indicated when a key is pressed and released.
The function shown above, which is started when pressing and end
when you release a key, indicates a possible variation in time. We thus
obtain a better understanding of how the amplitude of the modulator
and carrier oscillation changes with time and, thus directly connected,
how the resulting sound itself develops over time.
Such a variable in time called an envelope and is formed by the so
called envelope generator (
).
EG
volume and timbre envelope
Each operator contains an envelope generator. The output level, the
vibration magnitude (the amplitude, the volume) of each carrier and
modulator can be controlled independently. Thus timbre course
(modulator envelope) can be completely independent from loudness
course (carrier envelope). A similar envelope generator can be used to
FM Synthesis I, global and simple, © Ernst Bonis 1985/1993/2013
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