Leipzig 0.9.0 API documentation

Linearly interpolated change between from and to.
e.g. (->> notes (tempo (accelerando 0 4 3/2))))

Delay notes by wait.
e.g. (->> melody (after 3))

Sets a constant value for each note of a melody.
e.g. (->> notes (all :part :drum))

Returns a function that translates a beat number into seconds.
e.g. ((bpm 90) 5)

Replaces part of a melody with another.
e.g. (->> notes (but 2 4 variation))

Returns the total duration of notes.
e.g. (->> melody duration)

Zips an arbitrary quality onto a melody.
e.g. (->> (rhythm [1 1/2]) (having :drum [:kick :snare]))

Synonym for constantly.
e.g. (->> notes (wherever (comp not :part), :part (is :bass)))

Translates a sequence of durations and pitches into a melody.
nil pitches signify rests, vectors represent clusters, and maps
represent chords. Vector durations represent repeated notes.
e.g. (phrase [1/2 1/2 3/2 3/2] [0 1 nil 4])
(phrase [1 1 2] [4 3 [0 2]])
(phrase [1 [1 2]] [4 3])
(phrase (repeat 4) (map #(-> triad (root %))) [0 3 4 3])

Translates a sequence of durations into a rhythm.
e.g. (rhythm [1 1 2])

Transform both :time and :duration according to timing.
e.g. (->> notes (tempo (bpm 120)))

Sequences later after earlier.
e.g. (->> call (then response))

Repeats notes n times.
e.g. (->> bassline (times 4))

Applies f to the k key of each note in notes, ignoring missing keys.
e.g. (->> notes (where :time (bpm 90)))

Applies f to the k key of each note wherever condition? returns true.
e.g. (->> notes (wherever (comp not :part), :part (is :piano))

Blends melodies.
e.g. (->> melody (with bass drums))