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Sound data structures

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At the request of Don Stuart, here is some information about the formats supported by different sound libraries.

Contents

1 In-memory data formats

In-memory sound formats are fairly diverse.

1.1 Reading and writing sound files

Library Sound file format
HCodecs
(Audible a) => DiffUArray Int a
hsndfile
MArray
with
Float
and
Double
HSoundFile
[[Double]]
ALUT
OpenAL.AL.Buffer
WAVE
[[Int32]]
Sox Lists, Storable Vector, whatever you have a
hPut
and
hGetContents
function for.
libsox Storable Vector

1.2 Playing sounds

Library Sound file format
OpenAL
Ptr UInt8
,
Ptr Int16
, 1-N channels
SDL-mixer
ForeignPtr ChunkStruct
,
ForeignPtr MusicStruct

1.3 Sound processing libraries

Library Sound file format
dsp
Array a, [a]
synthesizer
[a]
, StorableVector.Lazy a,
(StateT s Maybe a, s)
(like stream-fusion)
jack Operates via mapping functions
mainMono :: (CFloat -> IO CFloat) -> IO ()

mainStereo :: ((CFloat, CFloat) -> IO (CFloat, CFloat)) -> IO ()
Hommage
[a]

1.4 MIDI-based

Library Sound file format
HCodecs Reads and writes MIDI files
midi Reads and writes MIDI files
alsa-midi Uses midi library
Haskore Uses midi library
alsa Custom midi and audio signal structures
YampaSynth Stand-alone program

1.5 Special-purpose APIs only (FFIs, etc.)

Library Sound file format
hCsound
CsoundPtr
HasSound / Haskore
OrcExp
hsc3
UGen

1.6 No public sound-buffer API

Library Sound file format
hbeat The relevant source files are missing!
hogg Very low-level API for Ogg internals only
libmpd No sound buffer API
sonic-visualizer No sound buffer API
truelevel Stand-alone program (uses WAVE)
wavconvert Stand-alone program