Hi,

Funny you should mention it - I've just been building a dsPIC based guitar
effects unit. It consists of a dsPIC33FJ64GP706 (which i got free off
microchip), and a CS4270 and lots of capacitors (which i didn't get free
().

The main limit I've met so far is RAM, which limits the amount of
reverb/delay you can add. My chip has 16kb, enough for a fairly muddy
bathroom-sounding reverb, but little more.

With ~500 cycles per sample (48khz stereo) and a one-cycle MAC it is
possible to do a fair bit of FIR/IIRing, I haven't really stretched it yet
though (haven't figured out what I want it to do!).

Jonny

Eric Brombaugh wrote:

> Doughy wrote:
>> Hello all,
>>
>> I am a signal processing engineer and also a guitarist. I would like
>> to start messing around with creating my own effects, and was
>> wondering the best DSP to do so.
>
> Depends on what you want to do and how much you want to spend. For
> low-end stuff, Microchip dsPIC processors are cheap, easy to interface
> and easy to program. They're not super fast though, so they won't be
> good for complex processing. For more complex processing you'd probably
> like to try ADI & TI DSPs that run much faster.
>
> Eric