Looking for suggestions of a free, or cheap program I could use to digitize a few old tapes. Essentially, it has to be something like WinDOS Sound Recorder. I want to plug my old Walkman into the line-in on my MBP, hit "record", and produce an MP3 or an MP4 file. I do not really need any frills like noise reduction, track detection, etc. My tapes are primarily audiobooks.