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Old 12th November 2002, 11:04 PM   #1
jwb is offline jwb  United States
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Default USB digital audio transciever

Someone please name a good USB digital audio transciever. The T-I PCM2906 seems like a good candidate, but neither Digi-key nor Allied nor Newark have any. Digi-key is quoting March for more stock!

I'd like to build a simple USB device with four digital outputs: AES/EBU, coax S/PDIF, optical S/PDIF, and I<sup>2</sup>S over LVDS. The device will be powered by the USB line.

I know Philips makes USB audio interfaces, but I can't figure out which are the ones I want, and where I can get them.

Other chips in the design will be TI DIR1704 for low jitter conversion of S/PDIF to serial audio, and CS8420 (I have spares laying around) for the AES transmitter.
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Old 13th November 2002, 06:50 AM   #2
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Default Hi jwb

I will use tas1020a from texas instruments.
http://focus.ti.com/docs/browse/prod...s&templateId=5
As soon as i get usb connector, i will make a board to see what happens, when i connect it to pc.
I do not know, how can i made tas1020a output i2s (with eprom conected to it or from pc).

Good luck,

Aleksander
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Old 13th November 2002, 12:57 PM   #3
MWP is offline MWP  Australia
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What happens with windows drivers when using these audio USB chips?
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Old 13th November 2002, 01:00 PM   #4
hifi is offline hifi  Sweden
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Windows got drivers for USB audio since Wiruz98 i think atleast i didnt need any new software for my PCM2702based dac. Works really god and kicks my AC97 onboard soundcard ...

Just make sure that the settings is for a continius data flow for optimal performance..

/micke
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Old 29th November 2002, 08:18 AM   #5
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When I connect tas1020 to computer windows xp does not recognize it. It is unknown device.


I need application code for tas1020b and DFU ( i guess this is program from ti for configuring tas1020 via usb).

If someone have this, please let me know.

Thank you in advance
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Old 9th December 2002, 08:46 AM   #6
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I also made pcm2702 dac and sound is simply great. I will not ever listen to pc souncards.
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Old 10th December 2002, 11:46 AM   #7
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Hi jwb,

Philips devices:
http://www.semiconductors.philips.co...tml#additional
They are dip devices with i2s output.
If anyone knows, where to get them, please let me know
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