linux-works
wolfson wm8804 and 'bodge board'
For the time being, the way to select the coax or opto input is by having a 5v relay actually connect one wire or the other, as shown with delicate, fragile wire wrap wire. the relay control routes off-board via the molex connector and ribbon cable.
The top orange wire comes from word-clock on the spdif receiver. I DC-block (AC-couple) it via a floor capacitor. (you know, the kind that you find on the floor and will work for any purpose at all).
far left is opto-in and opto-out, with the spdif being FIFO reclocked by the wolfson transceiver chip. not only does it give me wordclock (sample rate, which is what I display) but it 'de-jitters' the stream and so it could actually make the output sound better than the input ;)
wolfson wm8804 and 'bodge board'
For the time being, the way to select the coax or opto input is by having a 5v relay actually connect one wire or the other, as shown with delicate, fragile wire wrap wire. the relay control routes off-board via the molex connector and ribbon cable.
The top orange wire comes from word-clock on the spdif receiver. I DC-block (AC-couple) it via a floor capacitor. (you know, the kind that you find on the floor and will work for any purpose at all).
far left is opto-in and opto-out, with the spdif being FIFO reclocked by the wolfson transceiver chip. not only does it give me wordclock (sample rate, which is what I display) but it 'de-jitters' the stream and so it could actually make the output sound better than the input ;)