So 16 bit DAT is all over. Recently I've been running my mixes onto 2 tracks on my RADAR and transfering them to computer to top and tail them before handing them to the client as 24 bit WAV files. Mastering engineers seem to be happy with that. Is that the best current format? I do some mastering myself for clients using CD Architect. This allows me to render to 16 bit Audio CD or burn a wav of the album (I don't know if this contains red book information or not. I've heard of lots of formats from other mastering engineers such as validated CDR and DPPI but how can I make these formats and what can read them? Another question I have is what software are most engineers using. For me, the CD Architect approach is quite like SADIE (less powerful here and there though) but I've heard a lot of people mastering with Protools. How can you use PT to master when it has no facilities for PQ encoding and burning red book masters?