SynthMaker

How to Sync, Ringmod OSCs

Archive · 2011 11 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

1-2-Many ·

Is there info anywhere on how to do these operations within SM?

trogluddite ·

He he, yes those terms aren't very helpful in the search box - far too many unrelated hits!

They are both easy to do, though. Much easier in DSP than in a real analogue circuit, in fact.

Ring Modulation - just multiply the two oscillator outputs! Sync - you can generate the 'boolean' for the sync signal by checking when the 'Master' oscillator goes above zero. Note that this only works with simple oscillator waveforms - complex waves that cross zero many times will cause multiple 'sync's' per cycle. Here's a shot that shows how you might wire them up...

infuzion ·

trogluddite wrote: Sync - you can generate the 'boolean' for the sync signal by checking when the 'Master' oscillator goes above zero. Note that this only works with simple oscillator waveforms - complex waves that cross zero many times will cause multiple 'sync's' per cycle. Here's a shot that shows how you might wire them up...

I think that will keep syncing the 2nd OSC for 1/2 the 1st's cycle?

nix ·

I think it's right infuzion, sync is only on false to true, not true to false also. I am about to implement it in Entrancer, my synth.

trogluddite ·

Nix is correct, the sync is only on the False to True. (as described when you click on the primitive to see the 'long' connector name!!)

rl ·

AFAIK the sync in the build-in oscillators is not bandlimited...

trogluddite ·

rl wrote: AFAIK the sync in the build-in oscillators is not bandlimited...

Yes, just a hard reset of the wavetable counter ,judging from what the scope shows. But hey, sync is supposed to sound nasty, he he!! 😈

1-2-Many ·

Thanks Guys, The orig question came up when trying to create a pwm SAW...Still fine tuning it 🙂

Not quite sure if it's working properly

infuzion ·

OSM for lazy ppl plz?

1-2-Many ·

🙂 Here ya go

infuzion ·

Well, first of all, SM's PWM is bugged IMHO. So, try the one in my link first, & use a dual scope to test them against each other. Let us know how that goes please.

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