[sdiy] Waveform/source mixers in classic polysynths

[Tom Wiltshire]

The accepted wisdom is that audio mixers should use a log response rather than linear response. Audio mixers are usually equipped with log pots for this reason.

However, many polysynths have a waveform or oscillator/noise source mixer which usually uses linear control. Is there any reason for this?

Is it just that it was simplest when the obvious VCA to control a source’s level ahead of the filter was based on an OTA, which has a linear response?

Are there any examples of classic synths where this is *not* the case, and the waveform/source mixing is done with an audio/log response?

Background: I’ve been looking at old schematics again, for the Prophet 5 (learning from the masters!). I suppose there’s an outside chance they did a Lin/log conversion in the software before they sent the CV out, but I seriously doubt it.

Thanks,
Tom

==================
       Electric Druid
Synth & Stompbox DIY
==================