Re: [Alsa-user] arecord with mutiple aplay

[Zhou, Hui via Alsa-user]

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-user@lists.sourceforge.net
Subject: Re: [Alsa-user] arecord with mutiple aplay

You don't often get email from 
alexan...@bouillot.org<mailto:alexan...@bouillot.org>. Learn why this is 
important<http://aka.ms/LearnAboutSenderIdentification>
Feedback<http://aka.ms/SafetyTipsFeedback>
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 
mailto:alsa-user@lists.sourceforge.net>> 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
___
Alsa-user mailing list
Alsa-user@lists.sourceforge.net<mailto:Alsa-user@lists.sourceforge.net>
https://lists.sourceforge.net/lists/listinfo/alsa-user<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Falsa-user=04%7C01%7Chui.zhou%40kcl.ac.uk%7C1a8b699e3c6e48cbb95008d8f8e2d354%7C8370cf1416f34c16b83c724071654356%7C0%7C0%7C637533000383510486%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=bLQtwCCcsTAgIOCJMcQIs9x8BLu3auds5BiJFiDVfkk%3D=0>
___
Alsa-user mailing list
Alsa-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/alsa-user

Re: [Alsa-user] arecord with mutiple aplay

[Alexandre Bouillot]

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@lists.sourceforge.net> 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
> ___
> Alsa-user mailing list
> Alsa-user@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/alsa-user
>
___
Alsa-user mailing list
Alsa-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/alsa-user