[sdiy] dsPIC Stuff

[Oren Leavitt]

On 11/11/2012 8:08 PM, Scott Gravenhorst wrote:
>
> My Brain Is An Electron:
> http://electro-music.com/forum/download.php?id=32641
>
> Sometimes I Repeat Myself:
> http://electro-music.com/forum/download.php?id=32653
>
> These two pieces were done using an 8 voice polysynth implemented on dsPICs
> (a big thank you goes out to Tom Wiltshire for his help).
>
> The "Harpie" instrument consists of 3 dsPIC33F ICs, one serves as a MIDI
> controller and voice assigner which communicates via a one way SPI channel
> to the other two "voice engines".  Each voice engine manifests 4
> Karplus-Strong string models.  The Karplus-Strong model parameters for
> reflection filter Fc and linear damping are controlled by pots feeding ADC
> input pins.
>
> The second piece was done by recording the same MIDI sequence twice - one
> time an octave higher than the other and using Audacity, the two recordings
> were offset some small number of milliseconds in time and then mixed into a
> stereo track.
>
> The synthesizer is built on 2 stripboards and all 3 dsPICs run at 40 MIPS
> with a 20 MHz xtal.
>
> -- ScottG
> ________________________________________________________________________
> -- Scott Gravenhorst
> -- FPGA MIDI Synth Info: jovianpyx.dyndns.org:8080/public/FPGA_synth/
> -- FatMan Mods Etc.: jovianpyx.dyndns.org:8080/public/fatman/
> -- Some Random Electronics Bits: jovianpyx.dyndns.org:8080/public/electronics/
> -- When the going gets tough, the tough use the command line.
>


Mighty good stuff there Scott! Some amazing horsepower in those little
dsPICs.

- Oren