[sdiy] Quad wavetable osc

[karl dalen]

Great stuff as usually Tom! 
How much computing power do you have left in the 802? 

KD

--- Den tis 2011-08-16 skrev Tom Wiltshire <tom at electricdruid.net>:
> Hi all,
> 
> I've recently been doing some more work on my wavetable
> oscillator. Movie below:
> 
> http://www.electricdruid.net/QuadWavetableOsc.mov
> 
> (20Mb)
> 
> This is four wavetable oscillators running at 89KHz, 16-bit
> on a dsPIC 33FJ128GP802. The DAC is stereo, so it outputs a
> pair of oscs on each channel. Currently I've only got this
> running on test hardware, so I haven't got many controls on
> it, although there are loads in the code - just broad
> frequency knobs for each osc and a global control for
> scanning the wavetable. The software includes 100 original
> waveforms, and each oscillator can select any 9 of those
> waveforms to scan through/between. The wavetable resolution
> is variable, so you can have smooth sweeps or steppy
> wavetable jumps as you please. The oscillator resolution is
> also variable, from 16-bit down to 1-bit. This bitcrushing
> is demonstrated in the video.
> 
> My next step is to try and get a versatile interface and
> MIDI connected up to this so that I can fiddle with more of
> the available parameters and actually play notes. But I have
> to say that for now, I'm pretty happy with the thick, dark,
> spooooky noises that it's making.
> 
> Hope you like it, and I hope it inspires the other people
> who're working on wavetable ideas.
> 
> Regards,
> Tom