[sdiy] dsPICs with DACs: external 16bit?

[Tom Wiltshire]

On 7 Jul 2008, at 14:28, Michael Zacherl wrote:

> So, more generally spoken: _If I wanted_ more accuracy, would it be  
> reasonable to fit a set of 16bit ADC/DAC on a µC board (Arduino,  
> PIC, ...)?
> I just wondered when these little things hit their limits in  
> respect data handling speed and I/O capabilities.
> Just thinking of smaller apps like delays etc.
>
>    Michael.

Seb Francis' 4xD flanger/delay is a example of exactly this ( http:// 
burnit.co.uk/sdiy/index.php?page=4xd ).

He's got a dsPIC connected up to a 24-bit codec for input and output,  
though he's only using 16-bits (Cirrus 24-bit parts are so cheap you  
might as well use them). There's another PIC to handle the user  
interface to give you the maximum number of clock cycles for the  
audio processing. He has some notes about using the board as a  
general purpose DSP, and what he's already done gives some indication  
of what is possible. It's good work.

If I didn't have about another million projects already, I'd build  
one ;)

T.