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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 <alexandre@xxxxxxxxxxxx>
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, but when adding new channels shows issues. I since then moved to a new HW (a PC in my case) and
been able to cope with 3 simultaneous channels with one play and one record on each. Best, Alexandre Le ven. 2 avr. 2021 à 14:46, Zhou, Hui via Alsa-user <alsa-user@xxxxxxxxxxxxxxxxxxxxx> a écrit :
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