Screwlab is a program designed for slowing down and recording the playback of MP3s. It allows you to play and chop songs in mp3 format. Add a mic and you can give shoutouts on your remixes. Other features include tag editing, choosing bitrate to encode, and ability to record from streaming audio. Use the Record Stream feature to record from Ipods or Windows Media Player to make your own MP3s. Run more than one instance of Screwlab at the same time playing different songs!