Play a wav file with Haskell - haskell

Question

Is there a simple, direct way to play a WAV file from Haskell using some library and possibly such that I play many sounds at once?
I'm aware of OpenAL but I'm not writing some advanced audio synthesis program, I just want to play some sounds for a little play thing. Ideally the API might be something like:
readWavFile :: FilePath -> IO Wave
playWave :: Wave -> IO ()
playWaveNonBlocking :: Wave -> IO ()
I'm this close to merely launching mplayer or something. Or trying to cat the wav directly to /dev/snd/ or somesuch.

Answer 1

This is how to play multiple sounds on multiple channels at once with SDL. I think this answers the question criteria. WAV files, simple, Haskell, multiple channels.
import Control.Monad
import Control.Monad.Fix
import Graphics.UI.SDL as SDL
import Graphics.UI.SDL.Mixer as Mix
main = do
SDL.init [SDL.InitAudio]
result <- openAudio audioRate audioFormat audioChannels audioBuffers
classicJungle <- Mix.loadWAV "/home/chris/Samples/ClassicJungle/A4.wav"
realTech <- Mix.loadWAV "/home/chris/Samples/RealTech/A4.wav"
ch1 <- Mix.playChannel anyChannel classicJungle 0
SDL.delay 1000
ch2 <- Mix.playChannel anyChannel realTech 0
fix $ \loop -> do
SDL.delay 50
stillPlaying <- numChannelsPlaying
when (stillPlaying /= 0) loop
Mix.closeAudio
SDL.quit
where audioRate = 22050
audioFormat = Mix.AudioS16LSB
audioChannels = 2
audioBuffers = 4096
anyChannel = (-1)

Answer 2

I realize this is not actually a convenient way to do it, but I had the test code lying around, so...
{-# LANGUAGE NoImplicitPrelude #-}
module Wav (main) where
import Fay.W3C.Events
import Fay.W3C.Html5
import Language.Fay.FFI
import Language.Fay.Prelude
main :: Fay ()
main = addWindowEventListener "load" run
run :: Event -> Fay Bool
run _ = do
aud <- mkAudio
setSrc aud "test.wav"
play aud
return False
mkAudio :: Fay HTMLAudioElement
mkAudio = ffi "new Audio()"
addWindowEventListener :: String -> (Event -> Fay Bool) -> Fay ()
addWindowEventListener = ffi "window['addEventListener'](%1,%2,false)"
There you go--playing a WAV file in Haskell thanks to the power of HTML5! All you have to do is launch a web browser instead of mplayer. :D

Answer 3

using OpenAL through ALUT:
import Control.Monad
import Sound.ALUT
playSound :: IO ()
playSound =
withProgNameAndArgs runALUTUsingCurrentContext $ \_ _ ->
do
(Just device) <- openDevice Nothing
(Just context) <- createContext device []
currentContext $= Just context
buffer1 <- createBuffer $ Sine 440 0 1
buffer2 <- createBuffer HelloWorld
[source] <- genObjectNames 1
queueBuffers source [buffer1,buffer2]
play [source]
sleep 4
closeDevice device
return ()
main = playSound
to load a wav file:
buffer3 <- createBuffer $ File "/path/to/file.wav"
credit goes to Chris Double: http://bluishcoder.co.nz/articles/haskell/openal.html

Answer 4

module Main (main) where
import qualified SDL
import SDL.Mixer
main :: IO ()
main = do
SDL.initialize [SDL.InitAudio]
withAudio defaultAudio 4096 $ do
load "test.wav" >>= play
SDL.delay 1000
SDL.quit
I was trying to play sound with Haskell and I found this board when I searched how to do this. Actually, I want to know some kind of solution in Japanese sites because I am Japanese, but I couldn't find such sites.
I tried the OpenAl one above and with a little revision I succeeded, but I want to have a result with a simpler way.
I use 'sdl2' and 'sdl2-mixer' library. To do this, I had to install sdl2 and sdl2-mixer library into my OS.
I am using DebianOS and I installed 'libsdl2-dev' and 'libsdl2-mixer-dev' with apt command.
sudo apt instll libsdl2-dev libsdl2-mixer-dev
(Because I installed these files many months ago, so my memory is ambiguous.)
I use 'stack' to launch a Haskell project.
stack new myproject
(myproject is the project name)
In the myproject folder I edited the package.yaml file:
dependencies:
- base >= 4.7 && < 5
- sdl2
- sdl2-mixer
and I also edited then Main.hs file in the app folder. That is the above code.
I put the test.wav file in the myproject folder and with the command:
stack run
I could play the test sound.