Audio-Injector/stereo-and-zero

I2S SYNC error

Opened this issue · 1 comments

ondrejFuchs commented

Hi,
when I connect Raspberry Zero and Audio Injector Zero and start recording by RCA mic, I get note in dmesg: "I2S SYNC error!". I think it does not affect the function, but I would like to ask if this report can be removed / resolved? I read on Raspberry forum, that it is something about sync of clock signal by bcm2835 i2s driver. Can you give me more information about it. I start arecord with params: arecord -Dhw:0,0 -f -S32_LE c 2 -r 44000 -d 5 /test/test.wav

Thank you for answer.

cdgraff commented

I run into the same issues, I can improve a lot using

dtoverlay = audioinjector-wm8731-audio,i2s-mmap

The magic was this: i2s-mmap this allow tu use Memory to move the data into the i2s bus... don't remove 100% the SYNC error, but can say that 98% yes.

And be SURE that you are removed the audio=on that fullye disable the internal audio card, or will share the i2s bus.