[PD-ot] RS232 sound card?

Thomas Grill gr at grrrr.org
Thu Apr 17 17:19:05 CEST 2008


one more: it seems there are ready-made serial DACs:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1121
it has max. 5 MHz sample rate... don't know if it will work at 9600  
too....
gr~~~

Am 17.04.2008 um 16:36 schrieb Mathieu Bouchard:

> On Wed, 16 Apr 2008, Hans-Christoph Steiner wrote:
>
>> Has anyone ever seen an RS232 sound card?  I am looking for a  
>> sound card to hook up to old wifi routers.  They will run Pd, and  
>> have serial ports built-in, so it would be awesome to be able to  
>> hook up a serial sound card to them.  It is possible to add USB to  
>> many wifi routers, but it is a lot more work.
>
> There was software called MODPLAY for DOS, which included a plan  
> for a DIY parallel port soundcard running at 9.6 kHz, 8 bit, as  
> this type of soundcard was directly supported by that software. It  
> uses only resistors, as a kind of DIY DAC chip. It's better to use  
> an actual DAC chip, unless your resistors are very precise.
>
> It could be adapted for serial port if you have a RS232  
> deserialiser chip with enough bits in it. I don't know what name  
> you will find it under. It's also possible that you have to use a  
> combination of two chips for that, e.g. a RS232 chip with a  
> separate deserialiser. I don't know what's the real name for a  
> deserialiser. If you can't find one, you need in turn to make it  
> combining a mux and a 8-bit memory.
>
> Alternately, a PIC can function as a soundcard. This is probably  
> easier for anyone who is more into software than into electronics.
>
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