Chords, melodies, scales, transcribing, playing by ear, improvising, and all that good relative pitch stuff!
(or 'Perfect Pitch') Want to sing a C from nowhere? Tune your instrument by ear?
Can't tell a 3/4 from a 4/4? Want to break down that breakbeat? This is the place.
Turn that multi-track jumble into the beautiful masterpiece you hear in your head.
Know when and how your audio's been mangled! Chorus, flangers, delays, distortion, clipping, codecs...
Need general advice? Don't know where to start? If it doesn't fit in above, come ask here!