Post by Antoine Vignau
That is cool, Jonas.
Count me in for one, please, and keep up the good work,
I'm only making a few (less than 10) for myself and some friends (you included)
The CEM3396 chips are about $10/piece at the moment with some of them being duds.
Combined with the other chips it will result in a price of about $100 without shipping, assembly or testing.
A sales price would be about $200 and I wouldn't make anything with that ...
Its just a fun project. When im finished, I will provide all the schematics and layouts that anyone can make their own. It will have the option to use an external control-board with potentiometers or an DAC-Module that will allow software control. The 3 voices will be coupled (3 voice polyphonic) by the parameters but could be controlled individually. The individual programmability of each chip would need about 30 DAC channels ... to much for a single card (even with a sample-and-hold approach). Therefore I will implement a simple solution with expandable options (via headers) to add these software controls (io-select range).
Configurability by software could be done by a simple basic-script that sets the values for each parameter:
0. Waveform (for both oscillators A/B) 4 possible by 2bit select
1. Pulsewidth A
2. Pulsewidth B
3. Waveshape A
4. Waveshape B
5. Oscillator balance A/B
6. Filter Modulation (by oscillator A)
7. Filter Frequency
8. Filter Resonance
9. Gain (volume control)
All to be controlled by either analog input or software control by 8bit words.
... but I have to get there first :-P