[sdiy] dsPIC Stuff

[Robin Whittle]

Hi Scott,

Thanks for these swinging, delicate little electronic music-box pieces!
 I assume these are straight, without reverb.  The lower notes have a
somewhat resonant quality so it sounds rather physical.

Its great to hear what you have been able to do with three very small
and inexpensive pieces of *digital* silicon, DIP packages, protoboard,
hand-soldering and some serious firmware.  Did you write in C or Assembler?

What do you think about the audio quality of the DACs?  Did you go to
any great trouble with power supplies, sheilding or op-amps to get the
desired audio quality?

Can you tell us the sample rate you chose?


For those not up to speed on the dsPICs with dual audio quality DACs,
they are in various packages, including 28 pin DIP:

  http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=8192&mid=14

This table used to list the dual channel 16 bit audio DAC as something
like "1-D/A 2x16-bit @ 100(ksps)", but I can't see this information now.
 An example of the DIP devices with this DAC is the dsPIC33FJ128GP802:

  http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en532298

  - Robin