Hi Jeanette,
If you want to reduce the amount of table elements, you could calculate
the offset from the key base note, take it mod 12 and have a 12-element
array for every scale you want to implement (pseudo-C ahead):
bool minor[] = [true, false, true, true, false, true, false, true,
true, false, true, false];
uint32_t offset = 2; // key: D
// add offset instead of subtract to ensure the result is positive
uint32_t additive_offset = 12 - offset
uint32_t index = (note + additive_offset) % 12;
if minor[index]
play_note(note);
Won't probably make much of a difference in performance really, but it
should make it easier to implement all scales in all keys.
Hope that helps! :)
keep grooving
Roman
P.S. Duplicate because I sent with the wrong email address first ;)
"Jeanette C." <jul...@mail.upb.de> writes:
> Gopod morning Fons!
> Dec 31 2021, Fons Adriaensen has written:
> ...
>> There is code doing this [quantise frequency to scale] in zita-at1 (the
>> autotuner). It has some
>> refinements such as an optional preference for the previous note.
>> I will look this up and isolate it - it may be difficult to find
>> as it is integrated with other functionality.
> Many thanks, this is great! You are, as always, very kind.
>
> Best wishes,
>
> Jeanette
>>
>> Ciao,
>>
>> --
>> FA
>>
>>
>>
>
> --
> * Website: http://juliencoder.de - for summer is a state of sound
> * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g
> * Audiobombs: https://www.audiobombs.com/users/jeanette_c
> * GitHub: https://github.com/jeanette-c
>
> I thought love was just a tingling of the skin <3
> (Britney Spears)
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