Configuring Audio Devices
Making audio devices work in Linux can be complex and frustrating. Here are some tips:
Login to the console from another computer.
Use this command to list the audio devices that the system knows about:
Also you can try this command for more details:
alsamixer is a Linux command that allows you to set levels for devices and graphically display settings. You just type:
followed by the Enter key in the terminal/console.
Here’s a tutorial on how to work with sound on a Raspberry Pi (including aslamixer):