DSP Robotics Support

Hi. Is it possible to do linear detuning in Flowstone?
If so, how would i do that?

Cheers,
Espen.

Hi Espen

I’m not too sure what you mean by linear detuning. Do you mean adding or subtracting in Hz rather than Pitch (0-127) or normalised frequency (0-1)? Hz offset would give a bigger detune at lower frequencies, assuming the offset was constant.

Cheers

Spogg

Hi Spogg. I guess linear detuning isnt the right word. I saw someone use that word on another forum discussing detuning.

What i mean about 'linear detuning' is when you detune, lets say both oscillators, you get this beating effect. Now some synthesizers are able to do detuning without that beating effect. I believe the Minimoog and the taurus are capable of this?

Every detune causes the beating effet because of phase cancellations. If you are talking about the flanging effect, then its because both oscillators are starting their phase from 0 on every keypress. You have to randomize their phase on each key trigger to get rid of it.

Its hard to explain exactly what i mean. Do you happen to own Bazille by u-he? There is a 'beating' mode for the detuning part which will explain what i mean.

Nope I dont have it. Why dont you make some audio demos showing us the beating and non beating ones

Yes I could do that.

Detuned oscs will beat, yes, but the beating might be more or less prominent depending on the waveforms. Try with two saws. Then invert one saw ( multiply by -1).

Thank you Martin. Will try that.

Here's a demo of a module I knocked up just the other week to generate a randomly detuned version of an equal tempered (normal) scale.

So if you run a pair of oscillators, one using the normal scale and the other the detuned you should get pretty much what you're after.

Note that the numbers all belong to my project, so you'll likely have to modify them somewhat

But the general priciple might help. The ruby section generates a random range, with a minimum and maximum, which is applied to the input numbers. It's scaled (by this : * @input[j] ), so that you get roughly equal beats throughout the keyboard. Whereas simple de-tuning makes high notes beat faster than low notes.

Hugh