linux-works
spdif_samplerate_test
I hacked in a 74hc14 schmitt trigger (wave shaper) to clean up the i2s word clock (left-right clock). its going to be sent to a frequency counter along with an arduino (in software freq counter mode!). I hope to be able to detect when the music is 44.1k (cd) or 48k (movies downmixed to stereo) or 96k, 176k and 192k.
the i2s data comes from a wolfson wm8804 spdif receiver chip. takes in spdif (coax or toslink) and gives out i2s data, i2s clocks. one of the i2s clocks is exactly the samplerate (lr clock) and so we just use that directly!
spdif_samplerate_test
I hacked in a 74hc14 schmitt trigger (wave shaper) to clean up the i2s word clock (left-right clock). its going to be sent to a frequency counter along with an arduino (in software freq counter mode!). I hope to be able to detect when the music is 44.1k (cd) or 48k (movies downmixed to stereo) or 96k, 176k and 192k.
the i2s data comes from a wolfson wm8804 spdif receiver chip. takes in spdif (coax or toslink) and gives out i2s data, i2s clocks. one of the i2s clocks is exactly the samplerate (lr clock) and so we just use that directly!