[sdiy] Top Octave Generator (was Chinese MG-1s??!?)

[Manuel Odendahl]

On Apr 30, 2008, at 7:22 PM, Veronica Merryfield wrote:
>> C low	÷478
>> C#		÷451
>> D		÷426
>> D#		÷402
>> E		÷379
>> F		÷358
>> F#		÷338
>> G		÷319
>> G#		÷301
>> A		÷284
>> A#		÷268
>> B		÷253
>> C high	÷239

Untested idea, but as the ratios are fixed, you could write some long  
main loop being basically a sequence of nop loops interspersed with  
various bit banging calls to set the output frequencies at the right  
times, and then just run the input of the TOG as the oscillator of the  
microcontroller.

It would be like

239 nops
set C high
13 nops
set B
14 nops
set A#
etc...

(I skipped the clearing, but you get the idea).

Btw, hello everybody, I'm new to the list :)

Regards, Manuel
>>