[sdiy] How to get any TET from your Deepmind12

[ColinMuirDorward]

Oh yeah, 88CET = 13.64TET, so I guess I simply plug that into the formula
and solve as usual.

(Sorry, small jump in the convo here because I think I inadvertently missed
the reply to all button in a previous email.)

On Wed, Feb 19, 2020 at 7:58 AM Ian Fritz <ijfritz at comcast.net> wrote:

> With an analog VCO you can get any ET in seconds just by scaling and
> translating the input CV. For my alternate tuning I usually like the "88
> CET", which doesn't even have octaves. It can be heard on some of my audio
> and youtube demos.
>
> Ian
>
>
>
> On Feb 18, 2020, at 5:29 PM, ColinMuirDorward <colindorward at gmail.com>
> wrote:
>
> Ha, well put, Chris.
> Yes, like Adam said, it's simply the number of notes in an octave, spread
> in equal increments. aka EDO (equal division of the octave)
> It's nice to switch that up and try some other tunings. A bit like tasting
> different cuisines. There are a lot of notes to choose from!
> Colin
>
> On Tue, Feb 18, 2020 at 10:26 PM Adam Inglis (sdiy) <synthdiy at adambaby.com>
> wrote:
>
>> 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>
>> 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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