[sdiy] XOR as 'digital' ring modulator

[Speth, John]

Of course, it's the good sound we're after when all is said and done.  The MOTM-120 (http://www.synthtech.com/motm120.html) features a digital ring-mod.  I socketed the digital chip in my M120 so I could experiment with XOR vs NOR easily.

To my ears they both sounded the same when two waveforms were driven into it.  The XOR will sound the squared wave version of the sounding input if the other input is silent (IOW, out = in).

It was my opinion that a ring-mod should be silent when one of the inputs is silent so I left the NOR chip installed.  I still like it that way.  I wouldn't say a digital ring-mod is any kind of sub for the analog version.  It just sounds too different.

John Speth
mailto:john.speth at coherent.com

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