Earlier this year I purchased a Plextalk ptr1 talking book recorder because I have notes on tape I wanted to convert to daisy format. I like the plextalk machine and the plextalk recording software. The only thing is it is not small enough to take on the train and the battery life is too short. I saw the Book Port would play daisy books, it is small so I purchased a machine. I have updated the firmware to 2300 I put in a card with a book created on what must be one of the most popular digital talking book recording devices for end users in the world and the book port refuses to play it. All I get is a stupid error message saying playing of unfiltered files is not supported. I think this is absolutely useless especially as it will play the .mp3 files that make up the daisy book audio anyway. Many thanks Anthony