| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Sound.MIDI.ALSA.Query
Contents
Synopsis
- class C event
- note :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool))
- noteExplicitOff :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool))
- noteImplicitOff :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool))
- program :: C event => event -> Maybe (Channel, Program)
- anyController :: C event => event -> Maybe (Channel, (Controller, Int))
- mode :: C event => event -> Maybe (Channel, T)
- pitchBend :: C event => event -> Maybe (Channel, Int)
- channelPressure :: C event => event -> Maybe (Channel, Int)
Documentation
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.
Instances
| C Data Source # | |
Defined in Sound.MIDI.ALSA.Query | |
| C T Source # | |
Defined in Sound.MIDI.ALSA.Query | |
| C T | |
Defined in Sound.MIDI.Message.Class.Query | |
| C T | |
Defined in Sound.MIDI.Message.Class.Query | |
| C T | |
Defined in Sound.MIDI.Message.Class.Query | |
note :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool)) #
Warning: This returns note events as they are,
that is, a NoteOff p 64 might be encoded as such or as NoteOn p 0
depending on the content of event.
For normalized results you may use noteExplicitOff.
noteExplicitOff :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool)) #
Like note, but converts NoteOn p 0 to NoteOff p 64.
See explicitNoteOff.
noteImplicitOff :: C event => event -> Maybe (Channel, (Velocity, Pitch, Bool)) #
Like note, but converts NoteOff p 64 to NoteOn p 0.
See implicitNoteOff.
anyController :: C event => event -> Maybe (Channel, (Controller, Int)) #