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

[Manuel Odendahl]

Hi Veronica,

On May 1, 2008, at 1:46 AM, Veronica Merryfield wrote:
> A different thought, this would need 12 9bit counters and 12 9bit  
> compare logic blocks - that ought to fit in a small CPLD that cost a  
> few bucks and the programming tools are free.

Yes, I was thinking about this one. definitely easier and more  
reliable to design than on a uC. I toyed a bit with the uC  
implementation, using a 512 word buffer to make a "fast" version of  
the buffer. But still, at 20 instructions in between each bit toggling  
in the best case, you're quite living on the hard side. Maybe if you  
have a PLL inside the uC, like the dspics, you can get a bit more  
power and still track the frequency accurately, but the CPLD one is  
definitely easier.

Cheers, Manuel