During some private coaching I was asked if it is possible to build something like the Buchla Spectral Processor in Kyma. Certainly the answer is yes Or as Pete once said to me: “Of course this is possible in Kyma, I just don’t know how it’s done yet.”
Anyway, we just started to build it and of course we ended up with something different than the original. I’m not going to do a tutorial on how that Sound was made, I just want to explain the basic operation and of course share the Sound. So let’s have a look at the VCS and I’ll walk you through:
The Sound has two mono inputs, namely A and B. Each input has got its own embedded VCS. On the A-side you set two 16-band filters (A and B ) and you can morph between them using the Morph Fader. Also using the SingleA and/or B toggle you can isolate a single Band and sweep through the filters using BandA and/or B. Finally there are two faders for Bandwidth (BW) and Level. The potentiometers and the Freeze toggle affect the B-side:
The first 16-band filter is set manually (A) while the second set of filters (T) is the envelope followed output of the A-side. Therefore you need the potentiometers: Attack and Release affect the followed envelope using the new BiDiFollower class. Also there is a control for PreEmphasis in dB which is basically a high shelving filter. Frequency sets the frequency where the boost starts. The PreEmphasis will only affect the followed envelopes, not the output of A. The Freeze button sampleAndHolds the current envelope values and can be used to extract a static filter setting from the A input.
So the B-Side is kind of a Vocoder but the funky thing about it is you can morph between different filter settings on the A-side and therefore morph between different filter settings for the analysis/envelope followers.
Just for the fun of it I’ve added another version where the Morph faders get modulated by a LFO. But there are lots of other modulation possibilities here and also we haven’t even used the AnalogSequencer yet Let me know if you come up with something, feel free to share it on the Kyma Community Sound Library as well.