I have 21369 kit. To check performance I used the VisualAudio designer.
In basic.h I changed the default input to SPDIF;
//Default audio IO mode
#define DEFAULT_AUDIO_IO_MODE AudioIOMode_SPDIF
Then I built a test-model in VisualAudio, generated the code, sample at 44.1kHz and built+run the code in VisualDSP++. I attached a CD player's output to the SPDIF input and when I stop the CD player and turn up the volume by just a bit, I can heat hiss+"strange high pitched noise"
Is this normal or did I put a setting wrong?