| Safe Haskell | Safe-Inferred |
|---|
Sound.MIDI.Message.Channel.Voice
Description
Channel voice messages
- data T
- get :: C parser => Int -> Int -> Fragile parser T
- putWithStatus :: C writer => (Int -> T writer) -> T -> T writer
- type ControllerValue = Value
- type PitchBendRange = Int
- type Pressure = Int
- isNote :: T -> Bool
- isNoteOn :: T -> Bool
- isNoteOff :: T -> Bool
- zeroKey :: Pitch
- explicitNoteOff :: T -> T
- implicitNoteOff :: T -> T
- realFromControllerValue :: (Integral a, Fractional b) => a -> b
- bankSelect :: T
- modulation :: T
- breathControl :: T
- footControl :: T
- portamentoTime :: T
- dataEntry :: T
- mainVolume :: T
- balance :: T
- panorama :: T
- expression :: T
- generalPurpose1 :: T
- generalPurpose2 :: T
- generalPurpose3 :: T
- generalPurpose4 :: T
- vectorX :: T
- vectorY :: T
- bankSelectMSB :: T
- modulationMSB :: T
- breathControlMSB :: T
- footControlMSB :: T
- portamentoTimeMSB :: T
- dataEntryMSB :: T
- mainVolumeMSB :: T
- balanceMSB :: T
- panoramaMSB :: T
- expressionMSB :: T
- generalPurpose1MSB :: T
- generalPurpose2MSB :: T
- generalPurpose3MSB :: T
- generalPurpose4MSB :: T
- bankSelectLSB :: T
- modulationLSB :: T
- breathControlLSB :: T
- footControlLSB :: T
- portamentoTimeLSB :: T
- dataEntryLSB :: T
- mainVolumeLSB :: T
- balanceLSB :: T
- panoramaLSB :: T
- expressionLSB :: T
- generalPurpose1LSB :: T
- generalPurpose2LSB :: T
- generalPurpose3LSB :: T
- generalPurpose4LSB :: T
- sustain :: T
- porta :: T
- sustenuto :: T
- softPedal :: T
- hold2 :: T
- generalPurpose5 :: T
- generalPurpose6 :: T
- generalPurpose7 :: T
- generalPurpose8 :: T
- extDepth :: T
- tremoloDepth :: T
- chorusDepth :: T
- celesteDepth :: T
- phaserDepth :: T
- dataIncrement :: T
- dataDecrement :: T
- nonRegisteredParameterLSB :: T
- nonRegisteredParameterMSB :: T
- registeredParameterLSB :: T
- registeredParameterMSB :: T
- data Pitch
- fromPitch :: Pitch -> Int
- toPitch :: Int -> Pitch
- data Velocity
- fromVelocity :: Velocity -> Int
- toVelocity :: Int -> Velocity
- data Program
- fromProgram :: Program -> Int
- toProgram :: Int -> Program
- data Controller
- fromController :: Controller -> Int
- toController :: Int -> Controller
- increasePitch :: Int -> Pitch -> Pitch
- subtractPitch :: Pitch -> Pitch -> Int
- frequencyFromPitch :: Floating a => Pitch -> a
- maximumVelocity :: Velocity
- normalVelocity :: Velocity
- realFromVelocity :: Fractional b => Velocity -> b
Documentation
putWithStatus :: C writer => (Int -> T writer) -> T -> T writerSource
type ControllerValue = ValueSource
type PitchBendRange = IntSource
NoteOn with zero velocity is considered NoteOff according to MIDI specification.
NoteOn with zero velocity is considered NoteOff according to MIDI specification.
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 -> TSource
Convert all NoteOn p 0 to NoteOff p 64.
The latter one is easier to process.
implicitNoteOff :: T -> TSource
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.
Instances
fromVelocity :: Velocity -> IntSource
toVelocity :: Int -> VelocitySource
fromProgram :: Program -> IntSource
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") :
[]
toController :: Int -> ControllerSource
increasePitch :: Int -> Pitch -> PitchSource
subtractPitch :: Pitch -> Pitch -> IntSource
frequencyFromPitch :: Floating a => Pitch -> aSource
Convert pitch to frequency according to the default tuning given in MIDI 1.0 Detailed Specification.
maximumVelocity :: VelocitySource
The velocity of an ordinary key stroke and the maximum possible velocity.
normalVelocity :: VelocitySource
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.