alsa-seq-0.6: examples/broadcast.hs

import qualified Sound.ALSA.Sequencer.Address as Addr
import qualified Sound.ALSA.Sequencer.Client as Client
import qualified Sound.ALSA.Sequencer.Port as Port
import qualified Sound.ALSA.Sequencer.Event as Event
import qualified Sound.ALSA.Sequencer as SndSeq
import qualified Sound.ALSA.Exception as AlsaExc

main :: IO ()
main = (do
  putStrLn "Starting."
  SndSeq.withDefault SndSeq.Block $ \h -> do
  Client.setName (h :: SndSeq.T SndSeq.OutputMode) "Haskell-Broadcast"
  c <- Client.getId h
  putStrLn ("Created sequencer with id: " ++ show c)
  -- dst <- Addr.parse h "HS1:255"
  let dst = Addr.broadcast
  print dst
  let ev n =
         (Event.simple
            (Addr.Cons c Port.unknown)
            (Event.NoteEv n $
             Event.simpleNote (Event.Channel 0) (Event.Pitch 60) Event.normalVelocity))
         {Event.dest = dst}
  _ <- Event.outputDirect h $ ev Event.NoteOn
  _ <- getChar
  _ <- Event.outputDirect h $ ev Event.NoteOff
  return ())
  `AlsaExc.catch` \e ->
     putStrLn $ "alsa_exception: " ++ AlsaExc.show e