From gstopp@fibermux.comTue Aug 1 15:11:02 1995 Date: Tue, 01 Aug 95 14:55:23 PST From: gstopp@fibermux.com To: analogue@hyperreal.com Subject: Minimoogs are speed sensitive Here's a quirk to the Minimoog that I haven't seen on any other synth... Set the filter pots like this: CUTOFF......0 EMPHASIS....halfway up AMOUNT......halfway up or more ATTACK......0 DECAY.......1-2 seconds SUSTAIN.....0 Set the amplifer pots like this: ATTACK......0 DECAY.......max SUSTAIN.....0 Turn on the DECAY switch so that notes sustain after key release. This makes yer normal "|\" downramp envelope. Hit one key, wait a couple seconds, then start hitting the key faster and faster, and the peak of the envelope rises and the filter opens up more and more the faster you trigger the envelope. This makes it "speed sensitive" instead of velocity or pressure sensitive. Seems like the VCF envelope generator attack logic dumps the same charge on the EG cap regardless of where it is on the decay slope so the attack builds on the previous envelope cycle. It doesn't do this if the attack is anything other than zero, however. Anyway this suggests a new module which I've never heard of which outputs a slow moving voltage which rises as the incoming trigger speeds up and falls as the incoming trigger slows down. Hmmm what to call it..."trigger rate integrator"? "speed detector"? "F-to-V converter"? Just a thought.