Re: arecord with mutiple aplay

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 <[email protected]>
Sent: 06 April 2021 11:00
To: Zhou, Hui <[email protected]>
Cc: [email protected]
Subject: Re: [Alsa-user] arecord with mutiple aplay

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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 <[email protected]<mailto:[email protected]>> a écrit :
Dear community,

I am currently working on streaming one input audio to multiple output speakers.

Here is the procedures:

mkfifo audio.wav
arecord -D "input device" audio.wav
aplay -D "speaker1" audio.wav
aplay -D "speaker2" audio.wav

The problem is once I run the "aplay -D "speaker2" audio.wav", the audio in two speakers becomes intermittent.

But there is no problem when I only play on speaker1.

Could anyone help me on this?

Thanks!

Best regards,
Hui
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