[AudioI] AUDIO INJECTOR STEREO SOUND CARD works on RASPBERRY pi 4b with Raspbian buster ?

[Ron]

Hello Esteban,

Try this first before re-installing the O.S.   sudo apt install 
alsa-utils   .   You may need to do a:   sudo apt update and then sudo 
apt full-upgrade before installing the alsa utils.

After this is completed at a command line, try:   aplay -l.  This will 
list all the attached audio devices.   If it shows audio devices then 
try:  alsamixer.

If none of this works,  I think you will need to download the current 
Raspbian O.S from the Raspberry site: 
https://www.raspberrypi.org/downloads/raspberry-pi-os/

Make sure you select "Raspberry Pi OS (32-bit) with desktop and 
recommended software". Do not select either of the other options. You 
want the full package.

73,
Ron / W4MMP

On 9/1/2020 12:14, Esteban Mocetti wrote:
> Apparently they are not installed or not in the same place, I 
> installed Raspbian buster via raspbian imager, days before they change 
> the name of Raspbian Buster to official raspberry pi OS (in july 2020, 
> i dont remember the exact day). I did update and upgrade later. But in 
> the desktop menu ALSA mixer is not there... like it was on RPI3B+, and 
> when I try some ALSAmixer commands from terminal... it returns the 
> message....command not found. Do I need to install again Raspberry pi 
> OS from raspbian imager again (previously formating and erasing all 
> from the sd card), or installing ALSA utils package manually could 
> solve my problem?.
> Thank you very much for your answer!
> Esteban
>
> El mar., 1 sept. 2020 12:19, Ron via People 
> <people at lists.audioinjector.net 
> <mailto:people at lists.audioinjector.net>> escribió:
>
>     Hello Esteban,
>
>     I'm not sure why you say the ALSA mixer commands are not
>     available.  I just performed a complete installation of Buster
>     (A.K.A Raspbian O.S.) on a RPi 4B.   Alsamixer is available along
>     with the other ALSA utilities.  I use it control the Audio
>     Injector Zero.
>
>     73,
>     Ron / W4MMP
>
>     On 8/31/2020 16:44, Esteban Mocetti via People wrote:
>>     Since ALSA mixer commands are not accessible from Linux Raspbian
>>     Buster in RPi4b, I saw that they are replaced by *PulseAudio,* a
>>     network-capable sound server program distributed via the
>>     freedesktop.org <http://freedesktop.org> project.
>>     In broad terms I understand ALSA is a kernel subsystem that
>>     provides the sound hardware driver, and PulseAudio is the
>>     interface engine between Applications and ALSA. In a typical
>>     installation scenario under Linux, the user configures ALSA to
>>     use a virtual device provided by PulseAudio. Thus, applications
>>     using ALSA will output sound to PulseAudio, which then uses ALSA
>>     itself to access the real sound card. PulseAudio also provides
>>     its own native interface to applications that want to support
>>     PulseAudio directly, as well as a legacy interface for ESD
>>     applications, making it suitable as a drop-in replacement for
>>     ESD. I cannot find ALSA mixer commands in raspbian buster, that
>>     is because they are not there, so the sound uses pulseaudio
>>     directly ? or ALSA is running behind pulse audio?
>>
>>     So, in this context.... Audio Injector Stereo Sound Card... with
>>     Raspbian buster on RPi4b.. will still work with pulseaudio
>>     directly or only with ALSA mixer behind?, I need to reinstall
>>     ALSA mixer to recognize and access the sound card parameters?, or
>>     I can access and control sound card with ALSA behind pulse audio
>>     in some form?. Is it possible to manage sound cards via
>>     pulseaudio directly?. Has anyone tested this issue? Do I need to
>>     go back to RPI3b+ and Raspbian Jesse to use ALSA mixer with this
>>     sound card?
>>     A lot of questions.. excuse me....
>>     Please, if anyone could help me..., it will be really important
>>     for a music project with my son at school now, so it will affect
>>     the decision to buy 5 to 10 sound stereo cards from audio
>>     injector. I am from Argentina,  sorry for my english since it is
>>     not my native language.
>>     Thank you very much in advance to everyone.
>>     Esteban.
>>
>
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