> I haven't used the ISD chips since they first came out in those
> expensive personal memo recording devices that held a whopping
> 60 seconds

>From "fairly" recent experience the ISD-type chips I tried were still
only about 8kHz. This was way below the quality I wanted which is
why I did the project with a dsPIC33FJ64GP802. And of course
with a cheap-as-chips many-GB SD card you can have untold files
and hours and hours of playback

On a related note -

I've seen that several projects in Silicon Chip lately have been using
a PIC32 with a WM8731 CODEC IC for real-time audio conversions

Joe


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