Don't know why it would do that if they're .mp3's. Are you sending them via BP transfer? Although they should work either way. Lou ----- Original Message ----- From: Phil Parr To: bookport@xxxxxxxxxxxxx Sent: Monday, January 23, 2006 7:50 PM Subject: [bookport] My conundrum. When I try to play the m p 3 files I have recorded on my p t r book port says this. unfiltered files not supported It is of course not my intention to have unfiltered files so, how do I filter them and get my little bookport to play them? Phil Parr.