Radias and Amplitude Modulation?

Discussion relating to the Korg RADIAS, RADIAS-R and the R3

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CasaNovaCaine
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Joined: Thu Jul 23, 2009 3:07 am
Location: Ohio

Radias and Amplitude Modulation?

Post by CasaNovaCaine »

I was looking over the types of synthesis the Radias can use, and was reminded at how few limitations it seems to have. I own a Radias and continue to love it on a daily basis.

Re-reading the subject of amplitude modulation on the Sound on Sound Synth Secrets site:

http://www.soundonsound.com/sos/mar00/a ... ecrets.htm

...I came to an initial conclusion that the Radias does not use amplitude modulation. I would have to use the virtual patching to rout one of the two oscillators (not LFOs) directly to the amp, but osc1 or osc2 are not selectable sources. MIDI1 thru MIDI5 are selectable sources however, and I thought if you used a MIDI instrument that uses a raw saw, square, triangle, sine, etc. waveform, and then set the appropriate MIDI channel as a source, you could then perform amplitude modulation!

I don't claim to be a very experienced synth programmer but am learning. So if anyone could find flaws or successes in my routing, we could all further our programming knowledge together! My apologies for making that sound so cheesy.

But seriously...amplitude modulation on the Radias...is it possible?
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Citizen Klaus
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Joined: Thu Jul 23, 2009 2:39 pm
Location: Bloomington, IN

Re: Radias and Amplitude Modulation?

Post by Citizen Klaus »

CasaNovaCaine wrote: But seriously...amplitude modulation on the Radias...is it possible?
Caveat: I don't currently own a Radias, but I plan to rectify that, and I've spent a fair bit of time with the manual.

Would AM work if you set the virtual patch source to "KeyTrack"? The manual (p. 92) is a bit vague, but it seems as though that would route your oscillator output to the destination.

Edit: Nevermind. I see now that KeyTrack simply lets you use the keyboard as a sort of coarse-stepped fader system.


Edit 2:
MIDI1 thru MIDI5 are selectable sources however, and I thought if you used a MIDI instrument that uses a raw saw, square, triangle, sine, etc. waveform, and then set the appropriate MIDI channel as a source, you could then perform amplitude modulation!
I would think that would only work if your MIDI source had its own virtual patch system, and you used an audio-frequency oscillator to modulate some MIDI parameter (pitch bend, a control change, etc.) and then used that parameter as a virtual patch source. Even then, you'd get a very coarse sort of AM.
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