By "all digital," you fortunately encompass CDs. As I boarded a
S5 ERJ 170 the other day, I thought the music sounded rather strange. Once I took my seat, I could hear the problem -- the CD was skipping repeatedly! A F/A heard it about then, opened the overhead containing the IFE equipment, and removed it and placed a different CD in the slot.
The Ted safety videos I've seen on A320 aircraft have been on digital video tape. This is the same medium that plays the IFE video programming.
[Edited 2006-08-14 14:51:18]