At the very top of the module is a slider called initial gain.
Gain is another word for volume.
It's really important control as it sets the volume of the signals which pass through the 2600.
It opens the amp up... as you move the slider to the right.
Normally, the INITIAL GAIN slider will be set to closed (full left).
This "gates the sound".
The envelopes can now open and close the VCA,
allowing silence in between the times when
notes are being played.
The VCA has four inputs, two of which are audio,
two of which are control inputs.
One of the two audio inputs is normalled to the filter’s output.
The other is normalised to the ring mod.
The control inputs are hard wired to the AR & ADSR envelope generators.
The AR generator, is also labeled LINEAR,
while the the ADSR generator, is labeled EXPONENTIAL.
while the the ADSR generator, is labeled EXPONENTIAL.
These are response curves.
Remember, that you can use both envelopes simultaneously.
That is, the AR + ADSR can create really complex envelopes
when used together.
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