AAD
Seen on CD cases, meaning the music was recorded and mastered in analogue form - the first two As - but stored digitally (on the CD). |
AC-3
See Dolby Digital |
ADD
Music recorded in analogue form (A), mastered or remastered digitally (D), and stored digitally on CD (the third D). |
Alignment
Adjustment of a record-player cartridge relative to the groove on the disc. Bad alignment causes distortion. Tape heads also need alignment, but it's best left to the experts. |
Amplifier
Boosts signals to drive speakers. Can be one-box (integrated) or have separate pre and power sections. |
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