Safe Haskell	Safe-Infered

Sound.MIDI.Message.Channel.Voice

Description

Channel voice messages

Synopsis

Documentation

data T Source

Constructors

NoteOff Pitch Velocity
NoteOn Pitch Velocity
PolyAftertouch Pitch Pressure
ProgramChange Program
Control T ControllerValue
PitchBend PitchBendRange
MonoAftertouch Pressure

Instances

Eq T
Ord T
Show T
Arbitrary T

get :: C parser => Int -> Int -> Fallible parser T Source

putWithStatus :: C writer => (Int -> T writer) -> T -> T writerSource

type ControllerValue = Value Source

type PitchBendRange = Int Source

type Pressure = Int Source

isNote :: T -> Bool Source

isNoteOn :: T -> Bool Source

NoteOn with zero velocity is considered NoteOff according to MIDI specification.

isNoteOff :: T -> Bool Source

NoteOn with zero velocity is considered NoteOff according to MIDI specification.

zeroKey :: Pitch Source

A MIDI problem is that one cannot uniquely map a MIDI key to a frequency. The frequency depends on the instrument. I don't know if the deviations are defined for General MIDI. If this applies one could add transposition information to the use patch map. For now I have chosen a value that leads to the right frequency for some piano sound in my setup.

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.

realFromControllerValue :: (Integral a, Fractional b) => a -> bSource

Map integral MIDI controller value to floating point value. Maximum integral MIDI controller value 127 is mapped to 1. Minimum integral MIDI controller value 0 is mapped to 0.

bankSelect, vectorY, vectorX, generalPurpose4, generalPurpose3, generalPurpose2, generalPurpose1, expression, panorama, balance, mainVolume, dataEntry, portamentoTime, footControl, breathControl, modulation :: T Source

bankSelectMSB, generalPurpose4MSB, generalPurpose3MSB, generalPurpose2MSB, generalPurpose1MSB, expressionMSB, panoramaMSB, balanceMSB, mainVolumeMSB, dataEntryMSB, portamentoTimeMSB, footControlMSB, breathControlMSB, modulationMSB :: T Source

bankSelectLSB, generalPurpose4LSB, generalPurpose3LSB, generalPurpose2LSB, generalPurpose1LSB, expressionLSB, panoramaLSB, balanceLSB, mainVolumeLSB, dataEntryLSB, portamentoTimeLSB, footControlLSB, breathControlLSB, modulationLSB :: T Source

sustain, phaserDepth, celesteDepth, chorusDepth, tremoloDepth, extDepth, generalPurpose8, generalPurpose7, generalPurpose6, generalPurpose5, hold2, softPedal, sustenuto, porta :: T Source

dataIncrement, registeredParameterMSB, registeredParameterLSB, nonRegisteredParameterMSB, nonRegisteredParameterLSB, dataDecrement :: T Source

data Pitch Source

Instances

Bounded Pitch
Enum Pitch
Eq Pitch
Ord Pitch
Show Pitch
Ix Pitch
Arbitrary Pitch
Random Pitch

fromPitch :: Pitch -> Int Source

toPitch :: Int -> Pitch Source

data Velocity Source

Instances

Bounded Velocity	ToDo: We have defined minBound = Velocity 0, but strictly spoken the minimum Velocity is 1, since Velocity zero means NoteOff. One can at least think of NoteOff with (Velocity 0), but I have never seen that.
Eq Velocity
Ord Velocity
Show Velocity
Arbitrary Velocity
Random Velocity

fromVelocity :: Velocity -> Int Source

toVelocity :: Int -> Velocity Source

data Program Source

Instances

Bounded Program
Enum Program
Eq Program
Ord Program
Show Program
Ix Program
Arbitrary Program
Random Program

fromProgram :: Program -> Int Source

toProgram :: Int -> Program Source

data Controller Source

We do not define Controller as enumeration with many constructors, because some controllers have multiple names and some are undefined. It is also more efficient this way. Thus you cannot use case for processing controller types, but you can use lookup instead.

 maybe (putStrLn "unsupported controller") putStrLn $
 lookup ctrl $
    (portamento, "portamento") :
    (modulation, "modulation") :
    []

Instances

Bounded Controller
Enum Controller
Eq Controller
Ord Controller
Show Controller
Ix Controller
Arbitrary Controller
Random Controller

fromController :: Controller -> Int Source

toController :: Int -> Controller Source

increasePitch :: Int -> Pitch -> Pitch Source

subtractPitch :: Pitch -> Pitch -> Int Source

frequencyFromPitch :: Floating a => Pitch -> aSource

Convert pitch to frequency according to the default tuning given in MIDI 1.0 Detailed Specification.

normalVelocity, maximumVelocity :: Velocity Source

The velocity of an ordinary key stroke and the maximum possible velocity.

realFromVelocity :: Fractional b => Velocity -> bSource

MIDI specification says, if velocity is simply mapped to amplitude, then this should be done by an exponential function. Thus we map normalVelocity (64) to 0, maximumVelocity (127) to 1, and minimumVelocity (1) to -1. That is, normally you should write something like amplitude = 2 ** realFromVelocity vel or 3 ** realFromVelocity vel.