Synthesizer.ALSA.Storable.Play

Play audio signals via ALSA. The module could also be called Output, because with a file sink, data can also be written to disk.

auxiliary functions

type Device = String

defaultDevice :: Device

defaultChunkSize :: ChunkSize

A suggested default chunk size. It is not used by the functions in this module.

makeSink

Arguments

:: (SampleFmt y, C t)

=> Device

ALSA output device

-> t

period (buffer) size expressed in seconds

-> SampleFreq

sample rate

-> SoundSink Pcm y

Useful values for the output device are

• "default" for mixing with the output of other applications.
• "plughw:0,0" for accessing sound output in an exclusive way.
• "tee:default,'output.raw',raw" for playing and simultaneously writing raw data to disk.
• "tee:default,'output.wav',wav" for playing and writing to WAVE file format. Note that the length cannot be written, when the program is terminated, leaving the file in an invalid format.

write :: Storable y => SoundSink handle y -> handle y -> Vector y -> IO ()

writeLazy :: Storable y => SoundSink handle y -> handle y -> Vector y -> IO ()

play functions

auto :: SampleFmt y => SoundSink handle y -> T y -> IO ()

autoAndRecord :: (SampleFmt y, C y) => FilePath -> SoundFmt y -> SoundSink handle y -> T y -> IO ExitCode

Play a signal and write it to disk via SoX simultaneously. Consider using auto with tee device.

autoAndRecordMany :: (SampleFmt y, C y, Traversable f) => f FilePath -> SoundFmt y -> SoundSink handle y -> T y -> IO (f ExitCode)

Play a signal and write it to multiple files. The Functor f may be Maybe for no or one file to write, or [] for many files to write.

monoToInt16 :: (Storable y, C y) => SoundSink handle Int16 -> T y -> IO ()

stereoToInt16 :: (Storable y, C y) => SoundSink handle (T Int16) -> T (T y) -> IO ()