[sdiy] How to get any TET from your Deepmind12

[ColinMuirDorward]

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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