Fw: [sdiy] AVR Synth Additional Inputs and Outputs

[Gabriel Lindeborg]

Thanks Jaroslaw!

Hope you don't mind me elaborating on my thoughts. I think you've made a 
great job w. the AVRSyn and this got me inspired!

95%! Hm, but that would be improved considerably if one would to use the 
built in multipliers of the ATmega16 and 16MHz, right?

An 8*4051 scanned matrix would provide for 64 inputs without using more 
I/O lines of the AVR. One could use say 32 for switches and 32 for controls.

Yes, this would be a whole new synth, I totaly agree. And I will leave 
the AVRSyn as is, just making some updates to the firmware.
Im struggling a bit w. the assembler code though as I'm more of a C 
coder my self.

//Gabbe

Jaroslaw Ziembicki wrote:
>>How far pushed is the uP?
> 
> 
> Approx. 95% of its power is already being used!
> 
> 
> 
>>Could somthing like the http://ucapps.de/mbhp_ain.html be used to scan
>>pots and switches instead and provide input for more EGs and other things?
> 
> 
> Adding more EGs and/or LFOs wouldn't be a big problem. They are all
> calculated in the main loop.
> 
> 
> 
>>Could something like http://ucapps.de/mbhp_aout.html hooked up to the
>>SPI be used to control external analog filters and other things?
> 
> 
> The best way would be to build a completely new (microcontroller-based)
> synthesizer. A double or triple DCO (saw/square outputs) and a number of
> trigger/CV outputs for controlling some analog modules.
> 
> 
> Regards, Jarek
> 
>