Multi-Function Audio playback problem
-
margus41
- Newbie
- Posts: 1
- Joined: Thu Jul 03, 2014 11:03 pm
Multi-Function Audio playback problem
I have built a board using the XS1-U8A-64-FB96-C5 based on the Multi-Function Audio Reference Design.I have modified the XN file to fit my setup.I have successfully flashed the binary.When i connect it to my Mac it appears under audio output devices.However, when i try to play some music, nothing happens (the playback time counter does not count).Any suggestions on where to start my debugging?
-
infiniteimprobability
- XCore Legend
- Posts: 1126
- Joined: Thu May 27, 2010 10:08 am
There are lots of reasons why the reference design would stop working when you change ports, however one candidate springs to mind.
If the code enumerates, then the chip is basically working and being clocked. If no audio streams (and it generally stops responding to sample rate changes..try Audio MIDI setup to do this in OSX) then it ussually means the audio subsytem has stalled.
So check the assignment of the audio ports carefully - particulalry MCLK as getting this wrong would cause symptoms you are seeing. The whole audio subsytem is synchronous to MCLK, so it is critical to have this right.
If this doesn't work, I would suggest step by step verification of pin mapping.
If the code enumerates, then the chip is basically working and being clocked. If no audio streams (and it generally stops responding to sample rate changes..try Audio MIDI setup to do this in OSX) then it ussually means the audio subsytem has stalled.
So check the assignment of the audio ports carefully - particulalry MCLK as getting this wrong would cause symptoms you are seeing. The whole audio subsytem is synchronous to MCLK, so it is critical to have this right.
If this doesn't work, I would suggest step by step verification of pin mapping.