Sound.MIDI.Message.Class.Query

Documentation

class C event where

All methods have default implementations that return Nothing. This helps implementing event data types that support only a subset of types of events.

Maybe a better approach is to provide type classes for every type of event and make C a subclass of all of them.

Methods

note :: event -> Maybe (Channel, (Velocity, Pitch, Bool))

program :: event -> Maybe (Channel, Program)

anyController :: event -> Maybe (Channel, (Controller, Int))

pitchBend :: event -> Maybe (Channel, Int)

channelPressure :: event -> Maybe (Channel, Int)

mode :: event -> Maybe (Channel, T)

Instances

C T

C T

liftMidi :: (T -> Maybe (Channel, a)) -> T -> Maybe (Channel, a)