Sound.MIDI.ALSA

value conversions

toChannel :: Channel -> Channel

fromChannel :: Channel -> Channel

toPitch :: Pitch -> Pitch

fromPitch :: Pitch -> Pitch

toVelocity :: Velocity -> Velocity

fromVelocity :: Velocity -> Velocity

normalizeNote :: (NoteEv, Velocity) -> (NoteEv, Velocity)

Return a NoteOff if input is a NoteOn with velocity zero. This is a trick of the MIDI standard in order to allow compression of a series of note events. After normalization you can safely match on NoteOn and NoteOff.

normalNoteFromEvent :: NoteEv -> Note -> (NoteEv, Velocity)

toController :: Parameter -> Controller

Controllers from 0x78 to 0x7F are special, you must assert that the controller number is in the range 0 to 0x77.

fromController :: Controller -> Parameter

toProgram :: Value -> Program

fromProgram :: Program -> Value

construction of event data records

noteEvent :: Channel -> Pitch -> Velocity -> Velocity -> Int -> Note

controllerEvent :: Channel -> Controller -> Int -> Ctrl

programChangeEvent :: Channel -> Program -> Ctrl

modeEvent :: Channel -> T -> Ctrl

accessors to event data fields

noteChannel :: T Note Channel

notePitch :: T Note Pitch

noteVelocity :: T Note Velocity

This may not yield what you expect. See normalizeNote.

ctrlChannel :: T Ctrl Channel

ctrlController :: T Ctrl Controller

This is undefined, if the controller is no regular controller but a channel mode message. Better use ctrlControllerMode.

data ControllerMode

Constructors

Controller Controller Int

Mode T

Instances

Eq ControllerMode

Show ControllerMode

ctrlControllerMode :: T Ctrl ControllerMode

ctrlValue :: T Ctrl Int

ctrlProgram :: T Ctrl Program