Dear Alexandre,
Thank you for your suggestion!
I found the problem is the FIFO can only be read by one process instead of
multiple process, and I have changed to use command "tee" to implement it.
Best regards,
Hui
From: Alexandre Bouillot
Sent: 06 April 2021 11:00
To: Zhou, Hui
Cc: alsa-us
Dear Hui,
One idea, not sure it will address your exact issue, but I saw the platform
running ALSA might not be powerful enough to cope will all the data.
I had the issue with multiple record sessions with different audio cards on
Rapberry Pi 3 where one record and simultaneous play worked fine,