Zebra...FM feedback doesn't work?

[JoeLowery215]

Hi. Let's say I have a Sine modulator going into an FMO1 set on FM by input. I turn the FMO 1 FM knob up for that classic FM sound...but then I ALSO want FMO1 to have feedback as well...

This doesn't seem possible in Zebra right? Unless I'm missing something.

[yellowmix]

Not at the same time as far as the manual describes FM by Input and FM Self are mutually exclusive. But there are likely multiple workarounds. Use another Sine OSC going into a sidechain of a mixer with the Sine modulator and use the mixer knob to balance the two.

[JoeLowery215]

Thanks! Can you explain how to do this exactly? I’m a little confused.

[JoeLowery215]

Not at the same time as far as the manual describes FM by Input and FM Self are mutually exclusive. But there are likely multiple workarounds. Use another Sine OSC going into a sidechain of a mixer with the Sine modulator and use the mixer knob to balance the two.

Sorry meant to quote you

[yellowmix]

Thanks! Can you explain how to do this exactly? I’m a little confused.

Lane 1: Osc 1 with Sine, Mixer with input from Lane 1 and sidechain from Lane 2, then FMO1 set to FM from input.
Lane 2: Osc 2 with Sine, mute the lane if you don't want to hear it.

Osc 1 will be the "self" modulating so make sure that and FMO 1 are tuned the same. Osc 2 is your "free" tuned modulator.

Use the mixer balance between "self" and "free" relative to the FM knob amount. You could also use each oscillator's gain controls especially since they can be modulated.

You can stick an FMO directly on Lane 2 or insert mixers to grab sidechain from OSC 1 and OSC 2 if you want to re-use the same tunings for another FMO on Lanes 3 and 4.

[JoeLowery215]

Thanks! Can you explain how to do this exactly? I’m a little confused.

Lane 1: Osc 1 with Sine, Mixer with input from Lane 1 and sidechain from Lane 2, then FMO1 set to FM from input.
Lane 2: Osc 2 with Sine, mute the lane if you don't want to hear it.

Osc 1 will be the "self" modulating so make sure that and FMO 1 are tuned the same. Osc 2 is your "free" tuned modulator.

Use the mixer balance between "self" and "free" relative to the FM knob amount. You could also use each oscillator's gain controls especially since they can be modulated.

You can stick an FMO directly on Lane 2 or insert mixers to grab sidechain from OSC 1 and OSC 2 if you want to re-use the same tunings for another FMO on Lanes 3 and 4.

Awesome thanks. I’ll give this a try.

Why would Osc 1 be self modulating?

[JoeLowery215]

Thanks! Can you explain how to do this exactly? I’m a little confused.

Lane 1: Osc 1 with Sine, Mixer with input from Lane 1 and sidechain from Lane 2, then FMO1 set to FM from input.
Lane 2: Osc 2 with Sine, mute the lane if you don't want to hear it.

Osc 1 will be the "self" modulating so make sure that and FMO 1 are tuned the same. Osc 2 is your "free" tuned modulator.

Use the mixer balance between "self" and "free" relative to the FM knob amount. You could also use each oscillator's gain controls especially since they can be modulated.

You can stick an FMO directly on Lane 2 or insert mixers to grab sidechain from OSC 1 and OSC 2 if you want to re-use the same tunings for another FMO on Lanes 3 and 4.

Thanks for the tip but I don't think this is producing the feedback for FMO 1. I just tried it

[KBSoundSmith]

Maybe this is what you're asking for? Try this:

• Initialize patch
• Setup Osc1 to output a Sine wave.
• Under Osc1 OscFX, select Scrambler
• Insert FMO1 to receive Osc1 as a Modulator
• Use FM dial on FM01 to desired amount
• Use Scrambler amount on Osc1 as a feedback control

To be clear, this would be Osc1 acting as feedback to Osc1. From the manual:

Scrambler -- Similar to operator feedback in FM synthesizers: the phase of the wave-
form is modulated by the wave itself, creating many new overtones. If you
need dirty-sounding digital oscillators, this is the one.

But if you are trying to Osc1 feed into FM01, but have the feedback either be the output of FM01 back into either Osc1 or FM01, that I believe you can't do.

[Etienne1973]

I understand what you are trying to achieve the same way as yellowmix. Feedback FM = pitch ratio 1:1 FM, right? So you want FMO 1 modulated by 2 operators at the same time? 1 with different pitch and another with same pitch as carrier FMO 1?

[JoeLowery215]

I understand what you are trying to achieve the same way as yellowmix. Feedback FM = pitch ratio 1:1 FM, right? So you want FMO 1 modulated by 2 operators at the same time? 1 with different pitch and another with same pitch as carrier FMO 1?

Nope. There's a cool trick/lead sound you can create with just two operators.

Feed a modulator (B) up an octave into a (A) carrier, then adjust the feedback of A. You get this awesome, muffy lead sound.

I can get kinda close in Zebra but there's no way to have the final carrier have feedback into itself

So it would look like this:

B (ratio 2:1) > A (with feedback)

[JoeLowery215]

Oh apparently I'm an idiot: