4.2

iPhone, iPod
touch, and the
iTunes app
)
WAVE (see
)
Web delivery,
including
YouTube,
Facebook, and
Vimeo
Blu-ray discs AC-3 (see
)
High-definition
(HD) DVD
AC-3 (see
)
Standard-
definition (SD)
DVD
AC-3 (see
)
Audio CDs AIFF (see
Devices MPEG-4
Common
Audio
Formats
QuickTime
Movie
QuickTime
Movie
H.264 for Blu-
ray
Dolby
Digital
MPEG-2 Dolby
Digital
MPEG-2 Dolby
Digital
Common