Stuart Polansky wrote:
Being the cheapo that I am, I ordered a similar USB-I2S board from DIYINHK (Hong Kong). With the little LED board it was $65. They also have a DAC board with the AK4490 chip. Looks very different from the one that Rich uses. Probably not as good. But, as a package, they are pretty cheap and at least the DAC uses 3.3V, 5V & 12V supplies. Probably a second supply also, but I can't see all the pin labels on the board. Either use it as is, or it can be custom programmed. I know nothing of this, but I bet Rich, Roscoe, TomP, Guy, Bruce and lots of others do.
If you buy TWO, it's $60 off. So if two of you want to go in, it's a really sweet deal!
For your information:
http://www.diyinhk.com/shop/audio-kits/ ... nd_led_pcbThe difference is this board set needs four regulated DC power supplies built and connected (+/-12VDC, +5VDC and +3.3VDC). The one in my parts list just needs two transformers and the USB board to I2S Bus board.
I would suggest looking at the Linear Technologies LT1085 and LT1033 3Amp series for the regulators. IIRC they have the fixed output units for those voltages at Digi-Key. The Audio Amateur issue with the Gary Galo LT KG-5 regulators uses them and sounds very good.