[sdiy] The Anything Box: Laptop as module?

[mikko.a.helin at nokia.com]

With S/PDIF i/o card you could use any audio sequencer to record control voltages directly, but you need S/PDIF to CV converter (obviously DIY). You could also write easily VST plugins (SDK available from Steinberg) that handle the CV data streams as audio. Audio is normalized to +/- 1 floating point, so in 16 bit system you have to use that scale. However, I have no idea how to handle gate on/off data, maybe you could use MIDI for that. One card with multiple S/PDIF I/O:s is the Hoontech ST Audio DSP 24 with digital I/O box, see www.staudio.com . You need these products:

PCI card:
http://www.staudio.com/products/dsp24/index.html

S/PDIF interface box:
http://www.staudio.com/products/dm3/index.html

For CV conversion you need some 16 bit DAC:s and ADC:s, some oscillator, shift registers and logics. Maybe someone could program the whole thing into FPGA.

-Mikko

> -----Original Message-----
> From: ext media.nai at rcn.com [mailto:media.nai at rcn.com]
> Sent: 25. October 2002 16:41
> To: John L Marshall
> Cc: synth-diy
> Subject: Re: [sdiy] The Anything Box: Laptop as module?
> 
> 
> 
> >There are plenty of sequencers that record frequency. Use 
> frequency to
> >voltage converters to derive control voltages. FM
> >
> >There are plenty of sequencers that record amplitude. Detect 
> the amplitude
> >to derive control voltages. AM
> 
> There are sequencers that can convert pitch and amplitude to MIDI, but
> afaik, none of them can generate DC voltages.  Even if they 
> could, digital
> audio interfaces are AC coupled.
> 
> 
> 
>