Faking Polyphony

It’s time to get a little fancier. We’re now going to make our sequence “polyphonic”. I put this in quotes because we’re sort of faking it — Evolver can only play one envelope at a time, but using the sequencer, we can actually play chords!

Remember that modulation sources are like invisible hands, and when routed to destinations, it’s like having those invisible hands turning those knobs the way you want. The sequencer is really just another modulation source, and we’re going to use the hands to vary the different oscillator pitches for us, as though before every key press we were reconfiguring the oscillators to make a new “1-finger chord”.

Unlike the oscillator frequency parameters and the MIDI tune numbers, the sequencer allows you to enter “quarter tones”. This is pretty cool, as not a lot of hardware synths support any sort of alternative tunings. For now it means that 2 sequencer steps are required to change the pitch one half-step.

This is really important, so I’m going to say it again: The sequencer’s oscillator Frequency values are in quarter-tone increments. So if you want step 2 to be an octave higher than step 1, you need to add 24 to step 1’s value, not 12.

Appendix A has a table of MIDI note values converted to Evolver Sequencer oscillator values, assuming you have MIDI Transpose set to +24.

Упражнение 1А:

Дата добавления: 2015-08-20