audacity

Audacity is a free, cross-platform, easy-to-use, multi-track audio editor and recorder with an interface which is translated into many languages. Audacity can record live audio through a microphone or mixer, or digitize recordings from other media. With some sound cards, and on any recent version of Windows, Audacity can also capture streaming audio. It is so simple to install Audacity and this tutorial covers the ground in the same process.