Audio Mixer and Modulation
On the far right hand side of the front panel there is a fourth unit labelled "PSU-3302" which is a mixer and modulation section where the three audio channels from the synthesizer units are mixed into a single channel with separate outputs and volume control for line and headphones. There are also three external mixer inputs for effects loops or other sound sources. The mixed level can be modulated by control voltages from an LFO or envelope enabling for example fade-ins while playing the keys.
The Modulation part of the PSU-3302 unit comprises an auxiliary envelope with delay and 3 separate outputs which simultaneously outputs the normal CV signal as well as an inverted signal and a voltage offset version of the signal. There is also a Sample & Hold module with its own built-in clock frequency function so no need to sacrifice an LFO, and there are two Control Voltage Processors, as well as inputs for the Korg PS-3010 Polyphonic Keyboard and the Korg PS-3040 Dual Foot Controller.
Read more about this topic: Korg PS-3300
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