Setting up your system. This section will describe the basics of setting up your Linux system to record audio from either an analogue or CD-ROM source. I'm basing this section around my Intel based Linux system which is running Redhat, but should be reasonably distribution neutral. Naturally a reasonable prerequisite is a working soundcard. Setting up for Analogue Audio Capture Firstly, set up your audio.
Most audio devices have a Line output sockets.
Line level is a standard that specifies what voltage the audio device will send out. If I remember correctly it is 500mV for domestic and Semi Pro devices, and 750mV for Pro audio devices. I would guess that the standard set for most soundcards will be 500mV, but some of the newer Pro audio may be to the higher standard It shouldn't make too much difference unless you are recording at very high levels. Turntables can be more of a problem, see below for more information. You could capture audio from VCR's as well.