The Hardwired Modulation Matrix - Xils lab PolyKB III User Manual

6.1.6.1

The hardwired Modulation Matrix

This section has five fixed modulation sources, the LFO1, the Noise (or LFO2), the ADSR2, the VCO2
and Velocity, and different targets for these sources, like the pitch of the Oscillators, the Filter Cut Off,
or the Waveform settings. In this section the assignation use switches, like on the original PolyKB
synthesizer. This kind of Modulation Matrix is called hardwired, as the sources and destinations are
predefined and can't be changed. This is the original vintage PolyKB matrix, which in the 80s might
have been one of the most powerful ones provided in a hardware synth.
Programming the modulation is very easy: a switch connects a source to a destination, while a knob sets
the level of the source signal, and therefore the amount of modulation applied to the destination.
Important : The switches have three states allowing positive (Green Led On) or negative (Red Led On)
modulation.
When no led is lit, either green or red, no modulation occurs, and the path between the source and the
destination is broken. ( Which is the default state of the switches )
Tip : Modulating the wave parameter of the oscillators is very specific to the PolyKB. A large amount
of modulation can act as a morphing between waveforms (from triangle to pulse). While a small