oakes/edna

; first hit middle c on the piano
[:piano :c]

; hit all twelve notes
[:piano :c :c# :d :d# :e :f :f# :g :g# :a :a# :b]

; by default you're on the 4th octave, but you can change it
[:piano {:octave 3} :c :d :e :f]

; maps let you change attributes for anything that comes after it
[:piano {:octave 3} :c :d {:octave 4} :e :f]

; notes are 1/4 length by default, but you can change that too
[:piano {:octave 3} :c :d {:octave 4, :length 1/2} :e :f]

; you have to change note lengths often so here's a shorthand
[:piano {:octave 3} :c :d {:octave 4} 1/2 :e :f]

; you can change individual notes' relative octave with + or - inside the keyword
[:piano {:octave 3} :c :d 1/2 :+e :+f]

; a number following the + or - changes it by that many octaves
[:piano {:octave 3} :c :d 1/2 :+2e :+2f]

; if there is no + or - before the number, it sets the note's absolute octave
[:piano {:octave 3} :c :d 1/2 :2e :2f]

; with all that, we can write the first line of dueling banjos
[:guitar {:octave 3} 1/8 :b :+c 1/4 :+d :b :+c :a :b :g :a]

; chords are just notes in a set
[:piano #{:c :e}]

; you can change the length of chords just like single notes
[:guitar {:octave 4}
  1/8 #{:d :-b :-g} #{:d :-b :-g}
  1/4 #{:d :-b :-g} #{:e :c :-g} #{:d :-b :-g}]

; to play two instruments simultaneously, put them in a set!
#{[:banjo {:octave 3} 1/16 :b :+c 1/8 :+d :b :+c :a :b :g :a]
  [:guitar {:octave 3} 1/16 :r :r 1/8 :g :r :d :r :g :g :d]} ; the :r means rest