The audio tools
Just to remark that audio support in Linux is a big chunk of code. Let's see a brief list of the most famous tools dedicated to audio management and manipulation we can find in almost every GNU/Linux-based system.
The ALSA utils
The first toolset we can use to manage audio devices (the ones based on the ALSA specifications) is alsa-utils, which is held in the package of the same name and can be installed as usual into our embedded kits. This toolset is composed of several programs, but two of the most important ones are aplay and arecord (we mentioned earlier). So, let's see a bit more in detail how they work.
How we can imagine by looking at their names basic usages for of these programs is to play and record an audio file. However, they can also be used to detect available ALSA sound cards in the system, especially the playback and capture devices.
We already saw that if we execute the aplay program on the Wandboard, we get the following list:
root@wb:~# aplay -l...
