freebsd-nq/usr.bin/file/Magdir/audio

#------------------------------------------------------------------------------
# audio:  file(1) magic for sound formats (see also "iff")
#
# Jan Nicolai Langfeldt (janl@ifi.uio.no), Dan Quinlan (quinlan@yggdrasil.com),
# and others
#

# Sun/NeXT audio data
0	string		.snd		Sun/NeXT audio data:
>12	belong		1		8-bit ISDN u-law,
>12	belong		2		8-bit linear PCM [REF-PCM],
>12	belong		3		16-bit linear PCM,
>12	belong		4		24-bit linear PCM,
>12	belong		5		32-bit linear PCM,
>12	belong		6		32-bit IEEE floating point,
>12	belong		7		64-bit IEEE floating point,
>12	belong		23		8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding),
>12	belong		24		compressed (8-bit G.722 ADPCM)
>12	belong		25		compressed (3-bit G.723 ADPCM),
>12	belong		26		compressed (5-bit G.723 ADPCM),
>12	belong		27		8-bit A-law,
>20	belong		1		mono,
>20	belong		2		stereo,
>20	belong		4		quad,
>16	belong		>0		%d Hz

# DEC systems (e.g. DECstation 5000) use a variant of the Sun/NeXT format
# that uses little-endian encoding and has a different magic number
0	lelong		0x0064732E	DEC audio data:
>12	lelong		1		8-bit ISDN u-law,
>12	lelong		2		8-bit linear PCM [REF-PCM],
>12	lelong		3		16-bit linear PCM,
>12	lelong		4		24-bit linear PCM,
>12	lelong		5		32-bit linear PCM,
>12	lelong		6		32-bit IEEE floating point,
>12	lelong		7		64-bit IEEE floating point,
>12	lelong		23		8-bit ISDN u-law compressed (CCITT G.721 ADPCM voice data encoding),
>20	lelong		1		mono,
>20	lelong		2		stereo,
>20	lelong		4		quad,
>16	lelong		>0		%d Hz

# Creative Labs AUDIO stuff
0	string	MThd			Standard MIDI data
>9 	byte	>0			(format %d)
>11	byte	>1			using %d channels
0	string	CTMF			Creative Music (CMF) data
0	string	SBI			SoundBlaster instrument data
0	string	Creative\ Voice\ File	Creative Labs voice data
# is this next line right?  it came this way...
>19	byte	0x1A
>23	byte	>0			- version %d
>22	byte	>0			\b.%d

# first entry is also the string "NTRK"
0	belong		0x4e54524b	MultiTrack sound data
>4	belong		x		- version %ld

# Microsoft WAVE format (*.wav)
0	string		RIFF		Microsoft RIFF
>8	string		WAVE		\b, WAVE audio data
>>34	leshort		>0		\b, %d bit
>>22	leshort		=1		\b, mono
>>22	leshort		=2		\b, stereo
>>22	leshort		>2		\b, %d channels
>>24	lelong		>0		%d Hz
# AVI == Audio Video Interleave
>8      string          AVI\            \b, AVI data

# Extended MOD format (*.emd) (Greg Roelofs, newt@uchicago.edu); NOT TESTED
# [based on posting 940824 by "Dirk/Elastik", husberg@lehtori.cc.tut.fi]
0	string		EMOD		Extended MOD sound data,
>4	byte&0xf0	x		version %d
>4	byte&0x0f	x		\b.%d,
>45	byte		x		%d instruments
>83	byte		0		(module)
>83	byte		1		(song)

# Real Audio (Magic .ra\0375)
0	belong		0x2e7261fd	realaudio sound file

# MTM/669/FAR/S3M/ULT/XM format checking [Aaron Eppert, aeppert@dialin.ind.net]
# Oct 31, 1995
0	string		MTM		MultiTracker Module sound file
0	string		if		Composer 669 Module sound data
0	string		FAR		Module sound data
0	string		MAS_U		ULT(imate) Module sound data
0x2c	string		SCRM		ScreamTracker III Module sound data
0	string		Extended Module	Extended Module sound data

# Gravis UltraSound patches
# From <ache@nagual.ru>

0	string		GF1PATCH110\0ID#000002\0	GUS patch
0	string		GF1PATCH100\0ID#000002\0	Old GUS	patch