Sound data structures

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Revision as of 17:28, 30 April 2012 (edit) Lemming (Talk | contribs) (→Sound processing libraries: alsa-pcm) ← Previous diff		Current revision (17:29, 30 April 2012) (edit) (undo) Lemming (Talk | contribs) (→MIDI-based: alsa-seq only MIDI data)
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	| [[ALSA|alsa-seq]]		| [[ALSA|alsa-seq]]
-	| Custom midi and audio signal structures	+	| Custom midi structures
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	| YampaSynth		| YampaSynth

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Current revision

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

Contents 1 In-memory data formats 1.1 Reading and writing sound files 1.2 Playing sounds 1.3 Sound processing libraries 1.4 MIDI-based 1.5 Special-purpose APIs only (FFIs, etc.) 1.6 No public sound-buffer API

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 () , StorableArray
alsa-pcm	(SampleFrame a) => Ptr a
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-seq	Custom midi 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

Category: Music