From Brian Willoughby Sent Mon, Jul 23rd 2018, 03:09
From Brian Willoughby Sent Mon, Jul 23rd 2018, 03:09
I=E2=80=99m trying to reproduce this patch on the Matrix-12. I assume that since the OB-X has SVF circuits that the Matrix-12 should = be set to 2-pole lowpass. Stacking 12 voices with Detune set to 50% seems to work fairly well. The = Matrix-12 surely has variation in the VCF cutoff tracking since that=E2=80= =99s one of the things adjusted for on the TUNE page. Brian On Jul 20, 2018, at 6:45 AM, Michael E Caloroso = <xxx.xxxxxxxxxxx@xxxxx.xxx> wrote: > Actually I did not use cross mod or hard sync. Just ramp waveforms > (VCO2 at half level) with resonance and EG modulation at full, with > unison turned on. >=20 > The key is those SVF filters and full EG modulation - little known > secret is that the modulation depth isn't identical between voice > cards due to imperfections in the circuit. With greater modulation > depth, VCF Cutoff is going to vary between voices. But that > "imperfection" is the key to the sound. By pushing EG modulation to > max, you're exploiting the imperfection because as the EG is decaying, > the VCF cutoff of all those voices firing in unison go from very > different to closer. That's how that "grind" is created - badly > matched cutoffs sweeping, then as it decays to sustain level the > cutoffs are now closer. >=20 > Then the patch is just fine tuning sustain level and VCF cutoff until > it is "just right". No doubt that some distortion in the 3080s is > also adding some dirt to the sound. >=20 > I've been chasing "that sound" for years. It wasn't until I got the > OB-X that I realized how the "imperfections" were a big contributor. > Every other synth was "too perfect". I used to use VCO2 FMing VCF > cutoff on the Memorymoog but never got it right. Only the OBX or a > SEM polysynth (albeit a bit more work) can pull this off. >=20 > That sound was a factory preset for the pinstripe version of the OBSX, > but never the OBX. But the OBSX preset doesn't work because the VCF > is swept on release NOT decay.