Elka Synthex: Digital Ring Modulation??

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HideawayStudio
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Elka Synthex: Digital Ring Modulation??

Post by HideawayStudio » Sun Nov 07, 2010 2:39 pm

Can someone who really -knows- this lovely beast explain to me exactly how its digital ring mod works from both technical and UI points of view.

The Elka Synthex is a DCO synth and traditionally frequency modulation via cross modulation is much more tricky to implement - hence my curiosity.

I have the schematics but some real world experience with the instrument would further my understanding.

Naturally, if anyone has a Synthex they'd like to give me to pull apart and study........ :)

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Re: Elka Synthex: Digital Ring Modulation??

Post by cornutt » Sun Nov 07, 2010 4:35 pm

Is this one of those deals where they square up the waveforms and then run them through an XOR logic gate? That really isn't ring modulation, but it produces a similar effect. True ring modulation in the digital domain is done by multiplying the sample values of the two signals.
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Re: Elka Synthex: Digital Ring Modulation??

Post by Synthaholic » Sun Nov 07, 2010 6:56 pm

Does the Synthex have a *digital* ring mod? An analog ring mod is certainly doable on a DCO synth, since it occurs beyond the oscillator stage (unlike cross mod or FM).

If it's digital, it's probably the XOR method Cornutt mentioned (like the MG-1 uses). It wouldn't be sample multiplication without an A/D and D/A conversion.
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Re: Elka Synthex: Digital Ring Modulation??

Post by rjd2 » Mon Nov 08, 2010 4:05 am

i dont know HOW the circuitry works, cause frankly, i dont really give a s**t, but i CAN tell you that its really fun and using it on both oscillators can turn the synthex into a wierd noise machine approaching the cs40m. with differing octave settings it can do some things that are sort ofhard to describe. its really fun.

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