Documentation

data T Source

The datatypes for MIDI Files and MIDI Events

Constructors

Cons Type Division [Track]

Instances

Eq T
Show T
Arbitrary T

data Division Source

Constructors

Ticks Tempo
SMPTE Int Int

Instances

Eq Division
Show Division
Arbitrary Division

type Track = T ElapsedTime T Source

data Type Source

Constructors

Mixed
Parallel
Serial

Instances

Bounded Type
Enum Type
Eq Type
Ord Type
Show Type
Ix Type

empty :: T Source

An empty MIDI file.

type ElapsedTime = Integer Source

fromElapsedTime :: ElapsedTime -> Integer Source

toElapsedTime :: Integer -> ElapsedTime Source

type Tempo = Int Source

fromTempo :: Tempo -> Int Source

toTempo :: Int -> Tempo Source

explicitNoteOff :: T -> T Source

Convert all NoteOn p 0 to NoteOff p 64. The latter one is easier to process.

implicitNoteOff :: T -> T Source

Convert all NoteOff p 64 to NoteOn p 0. The latter one can be encoded more efficiently using the running status.

showLines :: T -> String Source

Show the T with one event per line, suited for comparing MIDIFiles with diff. Can this be replaced by Sound.MIDI.Load.showFile?

changeVelocity :: Double -> T -> T Source

A hack that changes the velocities by a rational factor.

getTracks :: T -> [Track]Source

resampleTime :: Double -> T -> T Source

Change the time base.

showEvent :: T -> ShowS Source

showTime :: ElapsedTime -> ShowS Source

sortEvents :: T -> T Source

Sort MIDI note events lexicographically. This is to make MIDI files unique and robust against changes in the computation. In principle Performance.merge should handle this but due to rounding errors in Float the order of note events still depends on some internal issues. The sample rate of MIDI events should be coarse enough to assert unique results.

progChangeBeforeSetTempo :: T -> T Source

Old versions of Haskore.Interface.MIDI.Write wrote MIDIEvent.ProgramChange and SetTempo once at the beginning of a file in that order. The current version supports multiple MIDIEvent.ProgramChanges in a track and thus a MIDIEvent.ProgramChange is set immediately before a note. Because of this a MIDIEvent.ProgramChange is now always after a SetTempo. For checking equivalence with old MIDI files we can switch this back.