Interplay ACM - Revision history

Siberian GRemlin: /* Games Using Interplay ACM */

2017-06-22T16:09:06Z

Games Using Interplay ACM

← Older revision		Revision as of 09:09, 22 June 2017
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	* [http://www.mobygames.com/game/fallout Fallout]		* [http://www.mobygames.com/game/fallout Fallout]
	* [http://www.mobygames.com/game/icewind-dale Icewind Dale]		* [http://www.mobygames.com/game/icewind-dale Icewind Dale]
			* [http://www.mobygames.com/game/mdk-2 MDK2]
	* [http://www.mobygames.com/game/windows/planescape-torment Planescape: Torment]		* [http://www.mobygames.com/game/windows/planescape-torment Planescape: Torment]


	[[Category:Game Formats]]		[[Category:Game Formats]]

Multimedia Mike: note about endian-ness

2016-10-16T19:45:35Z

note about endian-ness

← Older revision		Revision as of 12:45, 16 October 2016
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	== File Format ==		== File Format ==
	~~''(Is this big or~~ little endian~~?)''~~		Multi-byte numbers are little-endian.

	The ACM header:		The ACM header:

Multimedia Mike: reorganize example games

2013-01-05T06:49:32Z

reorganize example games

← Older revision		Revision as of 23:49, 4 January 2013
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	* Usage: Sound format		* Usage: Sound format
	* Examples: all Infinity Engine games (Baldur's Gate, Icewind Dale, Planescape: Torment), Fallout series
	* FourCC: 0x97 0x28 0x03 0x01		* FourCC: 0x97 0x28 0x03 0x01
	* Tools:		* Tools:
Line 47:		Line 46:
	short unknown;		short unknown;
	};		};

			== Games Using Interplay ACM ==
			* [http://www.mobygames.com/game/baldurs-gate Baldur's Gate]
			* [http://www.mobygames.com/game/fallout Fallout]
			* [http://www.mobygames.com/game/icewind-dale Icewind Dale]
			* [http://www.mobygames.com/game/windows/planescape-torment Planescape: Torment]


	[[Category:Game Formats]]		[[Category:Game Formats]]

Multimedia Mike: proper indentation

2013-01-05T06:46:30Z

proper indentation

← Older revision		Revision as of 23:46, 4 January 2013
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	This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.		This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.

			== File Format ==
			''(Is this big or little endian?)''

	The ACM header:		The ACM header:
	0x00 FOURCC		0x00 FOURCC
	0x04 sample count		0x04 sample count
	0x08 channel count (some ACM files lie about the channel count)		0x08 channel count (some ACM files lie about the channel count)
	0x0a sample rate		0x0a sample rate
	0x0c levels (4 bits) and subblocks (12 bits)		0x0c levels (4 bits) and subblocks (12 bits)
	0x0e <data>		0x0e <data>

	struct ACM_Header {		struct ACM_Header {
	long fourcc;		long fourcc;
	long samples;		long samples;
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	unsigned short levels : 4;		unsigned short levels : 4;
	unsigned short subblocks : 12;		unsigned short subblocks : 12;
	};		};

	The infinity games also contain a WAVC header which contains mostly redundant information. These files are used for all sound except music (ambients, voice over, sound effects).		The infinity games also contain a WAVC header which contains mostly redundant information. These files are used for all sound except music (ambients, voice over, sound effects).
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	The WAVC header:		The WAVC header:

	struct WAVC_HEADER {		struct WAVC_HEADER {
	char wavc_sig[4]; //WAVC		char wavc_sig[4]; //WAVC
	char wavc_ver[4]; //V1.0		char wavc_ver[4]; //V1.0
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	short samplespersec; //usually 22050		short samplespersec; //usually 22050
	short unknown;		short unknown;
	};		};

	[[Category:Game Formats]]		[[Category:Game Formats]]

Multimedia Mike: link to a new tool; remove dead tools

2013-01-04T05:18:53Z

link to a new tool; remove dead tools

← Older revision		Revision as of 22:18, 3 January 2013
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	* FourCC: 0x97 0x28 0x03 0x01		* FourCC: 0x97 0x28 0x03 0x01
	* Tools:		* Tools:
	** ~~[[acmlab]] from~~ [http://~~www~~.~~teamx~~.ru/ ~~teamx.ru~~]		** [http://libacm.berlios.de/ libacm]: An open source library for decoding Interplay ACM files
	** [http:~~//winamp.com/plugins/details.php?id=98751 Winamp plugin]~~

	This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.		This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.

Andux: +Winamp plugin, etc.

2007-04-29T06:57:34Z

+Winamp plugin, etc.

← Older revision		Revision as of 23:57, 28 April 2007
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	* Usage: Sound format		* Usage: Sound format
	* Examples: all Infinity Engine games (~~baldur~~'s ~~gate~~, ~~icewind dale~~, ~~planescape~~: ~~torment~~)		* Examples: all Infinity Engine games (Baldur's Gate, Icewind Dale, Planescape: Torment), Fallout series
	* FourCC: 0x97 0x28 0x03 0x01		* FourCC: 0x97 0x28 0x03 0x01
	* ~~tools~~: [[acmlab]] from teamx.ru		* Tools:
			** [[acmlab]] from [http://www.teamx.ru/ teamx.ru]
			** [http://winamp.com/plugins/details.php?id=98751 Winamp plugin]

	This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.		This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.

Avenger teambg at 17:22, 21 April 2007

2007-04-21T17:22:31Z

← Older revision		Revision as of 10:22, 21 April 2007
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	short unknown;		short unknown;
	};		};

			[[Category:Game Formats]]

Avenger teambg at 17:21, 21 April 2007

2007-04-21T17:21:37Z

← Older revision		Revision as of 10:21, 21 April 2007
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	Company: Interplay		* Extension: acm or wav
	Usage: Sound format		* Company: [[Interplay Entertainment]]
	Examples: all Infinity Engine games (baldur's gate, icewind dale, planescape: torment)		* Samples:
	FourCC: 0x97 0x28 0x03 0x01		* Sample Parser:
	tools: acmlab from teamx.ru
			* Usage: Sound format
			* Examples: all Infinity Engine games (baldur's gate, icewind dale, planescape: torment)
			* FourCC: 0x97 0x28 0x03 0x01
			* tools: [[acmlab]] from teamx.ru

	This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.		This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.

Avenger teambg at 17:18, 21 April 2007

2007-04-21T17:18:43Z

New page

Company: Interplay
Usage: Sound format
Examples: all Infinity Engine games (baldur's gate, icewind dale, planescape: torment)
FourCC: 0x97 0x28 0x03 0x01
tools: acmlab from teamx.ru

This is a lossy compressed audio format with a rather weak compression ratio. (converted to WAV then recompressed to OGG makes it roughly half size). ACM files can be in varying sample rates, but the common one is 22050 Hz, 16 bits and stereo.

The ACM header:
0x00 FOURCC
0x04 sample count
0x08 channel count (some ACM files lie about the channel count)
0x0a sample rate
0x0c levels (4 bits) and subblocks (12 bits)
0x0e <data>

struct ACM_Header {
long fourcc;
long samples;
unsigned short channels;
unsigned short rate;
unsigned short levels : 4;
unsigned short subblocks : 12;
};

The infinity games also contain a WAVC header which contains mostly redundant information. These files are used for all sound except music (ambients, voice over, sound effects).

The WAVC header:

struct WAVC_HEADER {
char wavc_sig[4]; //WAVC
char wavc_ver[4]; //V1.0
long uncompressed; //the uncompressed length (i guess it is raw pcm)
long compressed; //the compressed length
long headersize; //28 (the size of this header, also the offset to the ACM header)
short channels; //1 or 2
short bits; //8 or 16
short samplespersec; //usually 22050
short unknown;
};