Check out Focus MP3 Recorder. It allows you to schedule recordings using various inputs on your computer including the Line In. Hook up your Sirius tuner (doesn't matter which model as long as you have the home kit) using a RCA female to headphone. Use Focus to record the Sirius stream to mp3. You cab schedule Focus to record at a specified time and end and a set time as well. It can also be scheduled to record everyday. Good luck.