Semi-pointless challenge... Making orange noise in Zebra :)

[Sendy]

Yeah, I know.

Orange noise is white or pink (unsure...) noise with bands of zero energy which coincide with the notes of a particular scale. This is interesting musically because it supposedly has a "sour" tone, and I'm guessing it could well mesh with music more transparently.

A similar idea is noise with all the harmonics of one note removed... If you have a classical-style patch with a saw wave and a bit of noise, it might be an interesting effect to notch the noise on every (or most) harmonics of the sawtooth. I'm wondering if the psychoaccoustic masking effect might render any benefits moot, though...

So here's the challenge... Is anything like this possible in Zebra?

I'm thinking the comb modules might come in handy, but I'm no expert on those, so I'm just going to experiment...

If the worse comes to the worst, there's always individually notching every frequency out with a wave editor, I suppose... (such a task is not beyond me )

[Howard]

Might be able to do this with Allpass filter(s) in parallel with the dry signal. Or folded XMF? Thanks for the inspiration!

[jupiter8]

I may very well be overthinking this (or just plain wrong) but if the notches are thin enough it would just sound like an inverted sawtooth mixed with noise IE exactly the same. That doesn't sound right. I don't know,interesting challenge,please post the results.

[xh3rv]

SR Decimate filter is interesting here Try with everything zero but keyfollow

[e] The reasoning - dipping below Nyquist doesn't mean higher frequencies are filtered out, it means they're made discrete and 'blocky' from a graphical perspective; they actually generate distorted harmonics. They won't generate harmonics where the sample rate is sort of in tune, however, as these will be sampled without errors from discretization.

[FarleyCZ]

I don't think it would sound like inverted saw and noise. I bet that thin notches would couse noise being pretty much same sounding as the original one, becouse fequencies in noise appear randomly, if I'm right. But just guessing too. Interesting in result if someone get it done.

[hakey]

Internet fail - can't find an audio example of orange noise anywhere!

[FarleyCZ]

...which makes whole thing even more interesting.

[hakey]

"Orange noise is most easily generated by a roomfull of primary school students equipped with plastic soprano recorders"

[Sendy]

I don't think it would sound like inverted saw and noise. I bet that thin notches would couse noise being pretty much same sounding as the original one, becouse fequencies in noise appear randomly, if I'm right. But just guessing too. Interesting in result if someone get it done.

If the bandwidth of the notches were very thin, yes, I'm guessing it'd sound identical to normal noise. If they weren't so thin, I'm fairly sure it would sound like a 'frozen phase' effect (i.e. comb filtering without modulation) but with perhaps some quasi-musical character (similar to how the same situation but with bandpasses instead of notches would sound 'musical').

Also, bear in mind these are two problems, one is to remove the notes of a scale at every octave from the noise (I'm guessing just the fundamentals here, not every harmonic as well), and the other is to remove all the harmonics of a given note (which could then be transposed at will, of course).

I suppose the motherproblem then is to erase all the harmonics of all the notes of a particular scale, but would there really be any noise left after this?

These are interesting challenges to me because they sound like they should be doable, and also useful musically, yet I haven't thought of a way of doing it.

Can't really give it much thought as I'm currently going through all my VSTi's and installing them... Very very tedious especially when having to find and enter all these licence codes!