On 2011-02-21 18:50, Chris McSweeny wrote:
> Or is it unrealistic on a single chip, given the need for A/D,
> encoding, decoding, memory and D/A, in which case what chipset might
> do the job? Very happy with SM components provided they're not too
> dense (I normally use SOICs, but could go a bit closer pin spacing
> than that).
>
> Thanks,
>
> Chris

There are many PICs with ADCs for recording, and many can do fast enough=20
PWM for acceptable audio output even without a DAC.  If you choose a=20
"small" one, the issue may be having enough sample memory to hold the=20
recorded sound. You can add external memory, but at that point I'd=20
probably just choose a PIC with "a lot" of onboard memory and an onboard=20
DAC.  (I have recently been playing with dsPIC33FJ128GP802/04, with=20
128KB flash and onboard DACs, available in 6x6mm QFN and 10x8mm SOIC)

So what exactly is your size/weight budget?  What duration sound do you=20
wish to record?  Also, how loud do you want it?  The audio amp seems=20
like the only thing you couldn't find integrated into the PIC.


Joe Koberg


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