Heckmann Audio Repro-1 100B, Operation Manual

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DECAY knob: Varies the time for the envelope to fall from maximum to the SUSTAIN
level, also within a range of 2 milliseconds to more than 6 seconds.
SUSTAIN knob: The “hold” level, from zero to maximum. An interesting detail: while
being adjusted, SUSTAIN always decays to the new level – the longer the DECAY, the
longer it takes to reach the new SUSTAIN setting.
RELEASE knob: The time it takes for the envelope to fall from the current level
(usually SUSTAIN) down to zero after the key is released. The range is 2 milliseconds
to more than 6 seconds.
2-8 AMP ENVELOPE
The AMP ENVELOPE controls shape the envelope applied to volume, pre-effects.
Volume Curve trimmer: In the original hardware, the VOLUME knob actually controls
the amount of amp envelope modulating the final VCA. It also affects the curvature of
the envelope – not by design, but as a side-effect of how it works.
As Repro-1’s equivalent OUTPUT knob comes after all effects, the only feasible way to
implement this quirk is as an independent control (the unlabelled “trimmer” between
DECAY and SUSTAIN).
Here is how the attack and decay stages appear when Volume Curve is set to zero and
100. Note the punchy s-curve and shorter decay at minimum Volume Curve :
with trimmer set to minimum with trimmer set to maximum
INTRO SYNTH SEQUENCER KEYS-PERF EFFECTS TWEAKS CONFIG NKS
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