Make room for the resonance

Discontinued products Shruthi
#1

Here is a tip I have found…

Start with the “init” sound. Set the first oscillator to square ; set the second oscillator to “none”. Set the mixer balance to 0 (so oscillator 1 takes the full dynamic range), set cutoff to 70, resonance to 40. Ok? Play a few bass notes, sweep the cutoff up and down, now you get the sound?

Now set the mixer balance to 32 (oscillator 1 only uses half the dynamic range), Play a few bass notes, sweep the cutoff… Can you hear the difference? You leave more room for the resonance to develop without clipping, and I think this makes for very good SH-101 imitations!

This is the second “trick” of the Roland IR3109-based circuits (the first one being the resonance loudness drop compensation) - the signal level into the filters are 9 dB lower than on the SMR-4 (contrary to my intuition which was to maximize it to avoid increasing the noise floor), and this gives room for a very round resonance to develop without soft-clipping. Magic in the circuit, not in the chips…

#2

This is only for the IR3109-based filter boards, isn’t it?

#3

No, this is a trick to make the SMR-4 sound closer to the IR3109.

#4

oh I see! Thanks :slight_smile:

#5

sounds nice!
but it only works, if the 2nd ocs is silent.

gives me an idea for a small new feature:

the mix knob for blending osc1+2 is nice - so keep it that way, but maybe add overall level as a mod destination to be used with the offset source for that trick.

i dont want to bug you with feature requests as you have a lot of work, but i imagine it should not be a big thing. (would add a new variable to the patch data though, if i get it right) maybe implement it, when the patch data is changed for another reason (if that happens)

#6

Ok if there’s enough CPU for an extra multiplication per sample (it’s that tight :D)