[sdiy] How to get any TET from your Deepmind12

Adam Inglis (sdiy) synthdiy at adambaby.com
Wed Feb 19 04:26:31 CET 2020


12 tone equal temperament is the traditional (thanks JS Bach) division of the octave.

> On 19 Feb 2020, at 1:19 pm, Chris McDowell <declareupdate at gmail.com> wrote:
> 
> What is blazes is TET?!
> 
> 
> 
>> On Feb 18, 2020, at 5:11 PM, ColinMuirDorward <colindorward at gmail.com <mailto:colindorward at gmail.com>> wrote:
>> 
>> I just posted this on one of the forums, but perhaps someone here might find it useful as well.
>> 
>> I'm sure lots of folks have figured it out already, but it wasn't till two years after buying a DM12 that I realised you could get pretty much any equal division of the octave tuning out of it. Here's how: 
>> 
>> You'll need two modulation slots. NoteNum->PitchCoarse and NoteNum->PitchFine.
>> 
>> To solve for the coarse amount use (1536-128(TET))/TET
>> 
>> You'll probably get something like -54.8571 (this is for 21TET).
>> (BTW, it's negative because we need to reduce the key scaling down from the hardwired 12TET amount. If you plugged in for 10TET, you'd get a  positive value.)
>> 
>> So, round that to -55 and plug it into your coarse amount. Now we get out our FineTune to trim the error away. 
>> 
>> Multiply the difference by 256. So that's 256*0.142857... giving us 36.5714. Round that to 37 and enter that into the NotNum->fine tune amount.
>> Note that this is a positive modulation amount because we rounded our coarse down to 55, which made the spread a wee bit more than 21tet.
>> Also you can just trim the fine amount by ear.
>> 
>> Done!
>> 
>> I believe this works for any TET up to 1536TET. 
>> 
>> 
>> -- 
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>> -
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