Sound.ALSA.Sequencer

Documentation

data Event

Constructors

MIDIEvent Channel T

MetaEvent MetaEvent

SysExStart ByteString

SysExCont ByteString

Instances

Eq Event

Ord Event

Show Event

isNoteOn :: Event -> Bool

isNoteOff :: Event -> Bool

createClient :: OpenMode -> String -> IO Client

deleteClient :: Client -> IO ()

createInputPort :: Client -> String -> IO Port

createOutputPort :: Client -> String -> IO Port

withMIDIEvents :: String -> String -> ([Event] -> IO a) -> IO a

Process MIDI events from ALSA in a lazy manner. The processing function must be strict, in order to let the cleanup take place after abandoning the process.

receiveMIDIEvent :: Client -> IO (Maybe Event)

sendPlainEvent :: Client -> Event -> IO ()

drainOutput :: Client -> IO ()

Strangly ALSA returns error code 2 (No such file or directory) if the destination port does not exist.

initQueueTempo :: Client -> Queue -> Int -> Int -> IO ()

withNamedQueue :: Client -> String -> (Queue -> IO a) -> IO a

portAddress :: Client -> Port -> Address

numAddress :: Integer -> Integer -> Address

numAddressEither :: Integer -> Integer -> Either String Address

data Client

newtype Port

Constructors

Port CUInt

Instances

Enum Port

Eq Port

Show Port

Storable Port

eventFromMIDIEvent :: Queue -> Event -> (EventType, EventDataUnion)