usb to digital (spdif/xlr) coverter

[udailey]

Wavelength is incredible. Second best amp I ever heard. 300B Class A think it was a SET. 1994 version. Silver wire transformers. Dont know much more about it, but it was incredible.
Uriah

[udailey]

One of my buddies modded an iRiver and threw on some open source software. Sounded very nice. Of course it was playing through a Wavelength at the time
Uriah

[spzzzzkt]

Gordon @ Wavelength has developed probably the best asynchronous USB interface design currently available. He has posted about this in other forums.

http://www.usbdacs.com/Products/Products.html

Unfortunately you can't buy a standalone USB-to-anything interface from Wavelength.

While this definitely wont meet analog-sa's exacting standards, the HagUSB interface is worth a look. It's limited to 24bit/48khz. There is also a schematic there.

[udailey]

I think we are threadjacking. There is a spdif converter over on TwistedPear 's website. I think they have the schematic and BOM listed as well. They are sold out of boards but doesnt look like you were worried about a board anyway.
Wavelength is easy to get excited about, sorry for threadjack.
Uriah

[spzzzzkt]

forgot the hag link....

http://www.hagtech.com/hagusb.html

[analog_sa]

Originally posted by spzzzzkt
the HagUSB interface is worth a look.

In Hagerman's case this is meant to work with his dac which recovers the clock with a VCXO. With lesser dacs...

[elviukai]

thanks anyone, I will check this out.
as for quality I dont expect maximum quality, i still will be sticked with cd turnable for a while. actualy at my neighboard Vilmantas (www.lessloss.com) I have seen some seriuos pc cards tunings (looks amazing- 4 extra stage builded on card and it have only i2s outputs ) and whole pc builded from scrach to ensure purest digital signal. I think one day i will moove to this, but at that time I also probaly will moove to digital xovers also.

[spzzzzkt]

Originally posted by analog_sa



In Hagerman's case this is meant to work with his dac which recovers the clock with a VCXO. With lesser dacs...

But then Wavelength's async USB DAC's use an low jitter oscillator to controll data transfer and clock the DAC. That tells me I2S isn't exactly a "magic bullet".

[dangus]

If you can be satisfied with Toslink, the ADSTech "Instant Music" RDX-150 has Toslink in and out. C/P from my post at MP3car:

"I bought an RDX-150 on sale at Staples and had a look inside. The USB codec is a Burr-Brown/TI PCM2902E. Build quality looks pretty good (made in Taiwan, not China); the other chips are all major brands. It's got low-pass filters on the analog inputs and outputs, just like the evaluation board that TI sells for the PCM2902. There's an unpopulated connector location on the board that appears to go to the input pins on the PCM2902 for HID key inputs for vol up/down and mute, which might come in handy for a car pc or other embedded application."

According to these Rightmark tests, the ADSTech performs a lot better than the Behringer UCA202 that is based on the same chip.

For the price it's worth buying to modify; there's plenty of room in the case (and PC board) to add stuff like an RCA out.