Hi All,
It's an old topic, but still relevant to me. I've been using the AudioWidget for years with great pleasure. It's driving the front channels of a Philips SACD1000 (heavily modded!)
I'm thinking of ways to put the other channels in use as wel:
a) have one I2S feed only containing the left channel and one containing the right channel. The output of the stereo dac chips can be bridged to improve channel separation
b) have one I2S feed with left channel and left channel inverted, and one I2S feed with right channel and right channel inverted. Right channel of the stereo DAC will drive the HOT XLR pin and left channel of the stereo DAC will drive the COLD XLR pin to create a fully differential output.
Would it be possible to double the sample rate inside the AVR32 and use some logic ICs to send one word the first DAC and the next word to the second DAC? (and divide the master clock by two).
The AVR32 would then need to invert the audio signal for every other sample. (to achieve goal b) )
Without any changes in the AVR firmware, goal a) should be doable with similar logic. This is done in the Marantz SA14, see page 1-9/1-10 of the service manual:
Any thoughts on how to achieve objective b) using the Audio Widget?
Cheers
Frodo Muijzer
Op dinsdag 29 augustus 2017 om 19:43:33 UTC+2 schreef George Boudreau: