Last week we linked to an overview of recording on your computer. Well now Guitar Noize has a post about possibly turning those recordings in to cash. Pump Audio is a firm that licenses independent and mainly lyric free music for use in advertising, tv, radio, and web use. You retain rights to the song and make some bank. Sure, not many people aspire to be the creator of the background music for a car dealership ad or a podcast, but it's not a bad way to make money for stuff you were already doing.