DSOTM means "Dark Side of the Moon"....the great album by Pink Floyd from 1973 that stayed on the charts for many years. AHDN means "A Hard Days Night"....the Beatles song and movie title. Don't know ITCOTCK.
FWIW = for what it's worth IIRC = If I recall correctly SHM = Steve Hoffman mastered I'm lost on HFPA, DRC'd
a capriccio A free and capricious approach to tempo legato Joined (i.e. smoothly, in a connected manner) pizzicato Pinched, plucked (i.e. in music for bowed strings, plucked with the fingers as opposed to played with the bow; compare arco, which is inserted to cancel a pizzicato instruction; in music for guitar, to mute the strings by resting the palm on the bridge, simlulating the sound of pizz. of the bowed string instruments) staccato Making each note brief and detached; the opposite of legato. In musical notation, a small dot under or over the head of the note indicates that it is to be articulated as staccato. Credit (and far more terms): https://en.wikipedia.org/wiki/Glossary_of_musical_terminology Also see: https://en.wikipedia.org/wiki/Glossary_of_jazz_and_popular_music back-beat Beats 2 and 4 in 4/4 time, particularly when they are strongly accented. A term more used in rock 'n roll. bark A slang term used by keyboard players to refer to the growling, biting tone of a vintage Fender Rhodes electric piano when played through a tube amp. clam A slang term which refers to a mis-played or out of tune note, often by a horn player.