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Turns out that behavior is explained by the Ring Mod in the MS-20 actually being an XOR configuration. A modern synth that I can think of with this same configuration is Steinberg's Retrologue 2.CharlesFerraro wrote:There is something I messed up on (maybe two things but the other one doesn't really matter). The ring mod setup in MS-20 behaves super strange in that the pulse width control on oscillator 1 seems to fade up the signal of oscillator 2. At first I thought it was simply an AM configuration but it's not! I was only able to mimic the same sound on AL-1 by assigning a macro to the pulse width of osc 1 and mix level of osc 2 so that when the osc 1 pw was pushed to the point of zero output osc 2 would have it's gain all the way up in the mixer. Very strange!
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Interesting to note that the output waveform of the square LFO has a DC offset because it is unipolar. Haven't listened to see if the triangle/saw is bipolar but I suspect it is. (Turns out the graphic in the patch panel shows the tri/saw MG output is in fact bipolar). It would be neat if the saw up/down transformations are actually offset too while the tri remained centered. I don't think this is the case but I can check.
If anyone would like me to find the LFO rates of the 20 lmk. It would be interesting to find out if I can get a faster rate with it tempo sync'd at 300bpm vs AMS boosted.
Since I can't use an AMS mixer source for LFO rate (or in the very least the option is greyed out in the editor), as of right now, I don't think it's possible to keytrack the LFO rate to tune it like I did with the LFO's in AL-1. There might be a trick or two to examine in the patch panel but I haven't gone over that section yet.
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It's simply impossible to go super in-depth while keeping the video around ten minutes long. There are tons of subjects that I could go into detail on like CVs, linear vs exponential FM, signal flow... But I'd rather these tutorials be bite-sized snippets that include at least some information or techniques that aren't in the manual. All that being said, something that IS in the manual but still worth mentioning: when EG1 is manually patched into pitch via the panel it acts as a conventional envelope. That is to say, the start of the attack is the same pitch as note-on while the sustain pitch is pushed further and further from that start point with more EXT intensity.
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