AAC A digital coding standard used to compress audio files and distribute them over the Internet
aftertouch MIDI data type generated by additional pressure on keys after they have been struck. Aftertouch is also known as pressure.
AIFF (Audio Interchange File Format) A cross-platform file format supported by a large number of digital video and audio editing applications. AIFF audio can use a variety of bit depths, but the two most common are 16- and 24-bit.
alias A region in the workspace that mirrors a MIDI region somewhere else. You cannot edit an alias, only a real region, but any change to a region is reflected in its aliases. To create an alias, Shift-Option-drag the original MIDI region to a new location.
anchor A temporal ...