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ffx · Joined: 02 Feb 2012 Posts: 48

Is there a way to invert the oscillator waveform on the EXB-Radias or a way to emulate an inversion?

CharlesFerraro · Posted: Fri Mar 16, 2012 9:49 am Post subject:

Nope. The oscillators are free-running, that is, unless you have the timbre on mono. What exactly are you trying to do? Using unison within the oscillator and setting the phase will adjust the start position of the stacked oscillators.
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ffx · Joined: 02 Feb 2012 Posts: 48

Hi,

if you use a saw wave and add a reverse saw wave to osc 2 and then finetune up osc 2 a bit, you will get solid pwm wave modulation. Nice SID sound. This is what I want to get with EXB-Radias. I want this there to later combine the pwm sound type with other features from Radias.

So you say the oscs are freerunning until I switch to mono mode? But freerunning oscs wouldn't be a problem, I think.

ffx · Joined: 02 Feb 2012 Posts: 48

So there is no way?

CharlesFerraro · Posted: Fri Mar 16, 2012 12:56 pm Post subject:

I think you would be fine with oscillator 1 set to saw with the modulation set to 'waveform'. set control 1 to 50% and control 2 to about the same then adjust lfo 1 rate to taste.
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Computer: HackBook Pro 13" 2.66GHz Core2Duo, 8g RAM, 120gSSD+320gHD, SnowLeopard 10.6.8
Software: Cubase 6.5.4, Kore/Kontakt players, Alchemy player, KARMA M3 Software
Modules/Synths/Keys: EHX VoiceBox, Korg RADIAS, M3-M(all EXBs), Akai MPK61
Racks: Tascam TA-1VP, Behringer ADA8000, RME Fireface 800
Speakers: Blue Sky MediaDesk MKII 5.1, Mackie HR624 MK2(x5) with Tannoy TS10

ffx · Joined: 02 Feb 2012 Posts: 48

HardSync · Senior Member Joined: 07 Jan 2011 Posts: 261

ffx · Joined: 02 Feb 2012 Posts: 48

HardSync · Senior Member Joined: 07 Jan 2011 Posts: 261

True.

The Radias accepts audio inputs (which you can use the Aux L/R bus to input an EDS wave into a Radias program when in Combi mode), despite the lack of reverse waveforms in the Radias itself.

As noted above, Waveform Modulation is probably your best bet. You can get really close to PWM by setting LFO 1 to a triangle wave and increasing the control 2 modulation intensity. Adjust the speed of LFO 1 accordingly or use a controller to do so and you're rocking.

Will it be exactly what you want? No. But I like work with what I have rather than trying to make it be something it isn't.

X-Trade · Posted: Sat Mar 17, 2012 6:34 pm Post subject:

You could try ring modulating a sawtooth wave with a pulse wave.

Just trying to imagine the resulting waveform from the offset inverse sawtooth in my head..

I assume you're not after typical square wave pwm?

Or are you talking about something else entirely? Using the decimator wave shaper may help.
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