Usually for data intensive calculation higher data
rate transfer usually win hands down. 32 - bits, data
transfer from external memory. I believe dspic has a
problem when excessively accessing external memory
since it heavily depends on the throughput of the
transfer. 
There is the effect of disminishing returns......... I
have yet to find out yet. The point is that the CHIP
must be fast enough for realtime conversion and
nothing more(just being a player).

John

--- Wouter van Ooijen <wouter@voti.nl> wrote:

> > I don't believe they use dedicated MP3-decoder IPs
> because 
> > they support
> > multiple audio formats, so I can only assume the
> decoding is done in a
> > micro. But again, I may have underestimated the
> speed of 
> > those processors,
> > or perhaps they're more finely tuned to that kind
> of calculation.
> 
> remember a discussion about ARM-versus-PIC
> performance? IIRC a 60 MHz
> ARM can do real-time MPEG decoding. This is probably
> one of the
> applications where 32 bit versus 16 bit offers real
> advantage.
> 
> Wouter van Ooijen
> 
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>  
> 
> -- 
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