RackPack: Transient Designer
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Diagram 4 illustrates the original waveform and the envelope creation
to control the SUSTAIN processing. Envelope generator Env 1 follows the
original waveform, Env 2 is generated with prolongued sustain.
Diagram 5 shows the difference between Env 4 and Env 3 that defines
the control voltage of the VCA.
Diagram 6 displays the processed waveforms with maximum and mini-
mal sustain to compare against the original waveform in diagram 4.
Diagram 4: Generated Envelopes (Sustain)
Env 3
Env 4 (Prolongued Sustain)
Original Waveform
t/ms
U/V
Diagram 5: Calculated Control Voltage (Sustain)
Difference Env 4-Env 3
(Equals VCA Control Voltage)
t/ms
U/mV
Diagram 6: Processed Waveforms (Sustain)
Maximum Sustain
Minimum Sustain
Original Waveform
t/ms
U/V
Sustain Control Circuitry
Technology
