[sdiy] A new shade of pink (noise)

[Tom Wiltshire]

> On 25 Nov 2020, at 14:35, Richie Burnett <rburnett at richieburnett.co.uk> wrote:
> 
> Yes, Tom, I think your explanation is right.

Phew!!

> Except rather than the number getting bigger as you add more binary digits to the left, instead think of adding extra fractional binary digits to the right.  Then all of your noise sources have the same peak amplitude, you are just adding some intermediate fractional levels in between to allow you to do the interpolation.  Then you don't have to shift everything by the correct amount before you add up all the totals to get equal weighting.

Yes, you’re right. Adding fractional bits to the right is a better way to think of it.

> Did you get the ZIP file with recordings of the individual noise source example waveforms?  It didn't make it through on the list but I'll try message you again separately.

Yes, I got it, thanks. Nice to see it in action.

> I think the real clever bit of Stenzel's method is in the detail of how he implements these linear interpolations.  He treats the two PRBS output levels as "-1" and "+1" from what I can recall, instead of binary 0 and 1. Then you can feed these into an integrator which will do the ramping up and ramping down for you.

Yeah, that’s sneaky. I like it!

Tom

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       Electric Druid
Synth & Stompbox DIY
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