Noise waveform ignores frequency parameter

Question

Noise waveform ignores frequency parameter

octetta opened this issue a year ago · comments

Joseph Stewart commented a year ago

Is this by design?

Should I be filtering the noise to a specific frequency I desire?

If I want to use noise as a modulator, what's the best way to achieve this?

From a math point-of-view maybe my question makes no sense.

From an old-synth-nerd point-of-view I think it does.

Dan Ellis · Answer 1 · Tue Mar 07 2023 09:03:07 GMT+0800 (China Standard Time)

It’s not clear what a frequency parameter should do for noise. White noise is supposed to be flat in frequency. You probably want to put it through a variable filter. DAn.

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On Mon, Mar 6, 2023 at 13:03 Joseph Stewart ***@***.***> wrote: Is this by desing? Should I be filtering the noise to a specific frequency I desire? — Reply to this email directly, view it on GitHub <#31>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEGZUIVHZW27M33FIZ7DBLW2YRH7ANCNFSM6AAAAAAVROLZAE> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

Joseph Stewart · Answer 2 · Tue Mar 07 2023 09:51:45 GMT+0800 (China Standard Time)

Makes sense. Is it possible for the filtered output as a LFO?

Joseph Stewart · Answer 3 · Thu Mar 16 2023 07:05:58 GMT+0800 (China Standard Time)

Agree that this isn't needed.

smutax · Answer 4 · Wed Dec 13 2023 03:43:26 GMT+0800 (China Standard Time)

Hi. So was it something like "random (noise) LFO waveform" @octetta had in mind as modulation source? Like Sample & Hold LFO! Can it be achieved, or it's not implemented at this stage? That would be very nice! Also, as feature suggestion, would be great to have osc pan as modulation destination! Cheers.

Dan Ellis · Answer 5 · Thu Dec 14 2023 02:11:27 GMT+0800 (China Standard Time)

I just implemented a random-value sample-and-hold modulator in the lfosnh branch. So these commands:

amy.send(osc=1, freq=4, amp=0.1, wave=amy.NOISE)
amy.send(osc=0, wave=amy.SINE, mod_target=amy.TARGET_FREQ, mod_source=1)
amy.send(osc=0, note=64, vel=1)

.. will generate a sine tone whose pitch shifts randomly by a small amount 4 times a second. Is that what you meant?

Brian Whitman · Answer 6 · Thu Dec 14 2023 02:35:02 GMT+0800 (China Standard Time)

Also, as feature suggestion, would be great to have osc pan as modulation destination

That should already exist, although I'd believe it's not documented well. TARGET_PAN should work!

smutax · Answer 7 · Fri Dec 15 2023 03:13:35 GMT+0800 (China Standard Time)

Also, as feature suggestion, would be great to have osc pan as modulation destination

That should already exist, although I'd believe it's not documented well. TARGET_PAN should work!

Thanks for pointing out. Will try that. Cheers.

smutax · Answer 8 · Fri Dec 15 2023 04:07:05 GMT+0800 (China Standard Time)

I just implemented a random-value sample-and-hold modulator in the lfosnh branch. So these commands:
amy.send(osc=1, freq=4, amp=0.1, wave=amy.NOISE)
amy.send(osc=0, wave=amy.SINE, mod_target=amy.TARGET_FREQ, mod_source=1)
amy.send(osc=0, note=64, vel=1)
.. will generate a sine tone whose pitch shifts randomly by a small amount 4 times a second. Is that what you meant?

That might be it! I need to test and see. Thanks a lot for that @dpwe ! 👏

Joseph Stewart · Answer 9 · Fri Dec 15 2023 10:39:51 GMT+0800 (China Standard Time)

Here's a wire protocol example showing the TARGET_PAN in operation:

v1w0f1a1
v0w0g512L1
v0n64l1