Last year, I got one of these little low-cost audio Digital-to-Analog Converters on eBay:
Takes digital SPDIF coax in, and produces analog left and right channels out. I got them before the bigger picture of the audio chain in the living room got fleshed out, and in the end I don’t really need this type of converter anymore.
Besides, there was some hiss and hum with these, so it’s not really high-end anyway.
Here’s what’s inside:
That’s a Cirrus Logic CS8416 “192 kHz Digital Audio Interface Receiver”, which apparently has all the smarts to detect and decode a range of serial bit formats, plus a Cirrus Logic CS4344 “10-pin, 24-Bit, 192 kHz Stereo D/A Converter” to generate the L/R audio signals.
I’m a bit surprised by the hiss/hum issues, since the audio DAC is specified as -90 dB THD+N and 105 dB Dynamic Range, which to me sounds like it should be pretty good. Maybe not audiophile level, but hey… neither are my ears, anyway!