On Tue, Sep 11, 2001 at 01:11:47AM -0500, Steven Feil wrote:
> In addition to these consumer devices, I also found information on an
> integrated USB/CODEC chip manufactured by Philips. The most
> interesting thing is that full specs are available on-line. I've been
> searching for a sound "card" that utilizes this chip, but as of yet I
> have not found one. I've been thinking of sending an e-mail to Philips
> inquiring if any company has announced publicly there use of this chip
> in consumer devices.
>
> Philips Semiconductors UDA1325; Universal Serial Bus (USB) CODEC
> http://www.semiconductors.philips.com/pip/UDA1325H/N106
And also it's little brother the UDA1321. I have a USB sound device
based on the 1321, it works pretty well with the USB audio driver in
linux-2.4. Sound quality is *much* better than the Analog Devices
AD1881 in my laptop (which must have been wired in such a way to pick
up as much as noise possible).
The nice thing about the Philips chips is that they can also be wired
to output I2S, which is very easy to convert to SPDIF with a Crystal
8412 (IIRC) chip, or to feed directly to a high quality DAC.
Oh, and speaking about high quality, Burr-Brown also has a USB audio
codec chip. I don't know the exact part number, but details and data
sheets are available on their website (www.burr-brown.com).
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
Phone: +31-15-2783635 Fax: +31-15-2781843 Email: [EMAIL PROTECTED]
WWW: http://www-ict.its.tudelft.nl/~erik/
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