for whatever it is worth - we have had some strange experience with materiaals coming to us on compact audio CDs. Compression with IMA makes good files, whereas compression with Qualcom makes somewhat hollow sounding files. I guess that some experimentation and evaluation is always a good thing. We use (Movie) Cleaner 5 - which is a very nice tool for both video and audio and has a batch mode that makes it work all weekend long! Otmar