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.
.hc
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All mankind is of one author, and is one volume; when one man dies, one chapter is not torn out of the book, but translated into a better language; and every chapter must be so translated.... -John Donne
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.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada
here's something like that: http://www.instructables.com/id/8-Bit-Serial-Digital-to-Analog-5v- range-Converte/ no idea about the achievable baud/audio sample rate though
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.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada_______________________________________________ PD-ot mailing list PD-ot@iem.at http://lists.puredata.info/listinfo/pd-ot
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.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada_______________________________________________ PD-ot mailing list PD-ot@iem.at http://lists.puredata.info/listinfo/pd-ot
Cool, I'll try to get some samples of this. I am surprised you didn't represent Austria! ;) I found these, which look quite good for this purpose, they are sending me samples:
http://www.austriamicrosystems.com/03products/24_da_converter.htm
The only problem with the DIY RS232 audio will be driver support... I am not a kernel hacker... anyone know of ALSA support for RS232 audio? I'd love to make a kit for this, then we can run Pd on old wifi routers and have sound output! :)
By the way, the max RS232 rate of 115200 would give 1 channel of 8- bit audio at 14.4kHz.
.hc
On Apr 17, 2008, at 11:19 AM, Thomas Grill wrote:
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.
_ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada_______________________________________________ PD-ot mailing list PD-ot@iem.at http://lists.puredata.info/listinfo/pd-ot
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