https://wiki.wexosmk.xyz/index.php?action=history&feed=atom&title=AST_%28File_Format%29 2026-05-06T16:59:52Z Revision history for this page on the wiki MediaWiki 1.41.1 https://wiki.wexosmk.xyz/index.php?title=AST_(File_Format)&diff=37&oldid=prev 2024-05-01T16:53:04Z

<p>Imported from avsys wiki</p> <p><b>New page</b></p><div>&#039;&#039;&#039;AST&#039;&#039;&#039; files are sound files used in some [[GameCube]] and [[Wii]] games such as [[Super Mario Galaxy]], [[Super Mario Galaxy 2]] and [[Mario Kart: Double Dash!!]]. The file contains a header followed by blocks with data.<br /> <br /> = File Format =<br /> == Header ==<br /> The file starts with a 0x40 bytes long header as follows:<br /> <br /> {| class=&quot;wikitable&quot;<br /> |-<br /> ! Offset !! Type !! Description<br /> |-<br /> | 0x00 || Char[4] || &#039;&#039;&#039;File magic&#039;&#039;&#039;. Always &#039;&#039;STRM&#039;&#039; in ASCII.<br /> |-<br /> | 0x04 || UInt32 || &#039;&#039;&#039;Size of all [[#BLCK|sound blocks]]&#039;&#039;&#039; in bytes.<br /> |-<br /> | 0x08 || UInt16 || &#039;&#039;&#039;Audio format&#039;&#039;&#039;. 0 = AFC ADPCM, 1 = PCM16.<br /> |-<br /> | 0x0A || UInt16 || &#039;&#039;&#039;Bits per sample&#039;&#039;&#039;.<br /> |-<br /> | 0x0C || UInt16 || &#039;&#039;&#039;Number of channels&#039;&#039;&#039;.<br /> |-<br /> | 0x0E || Int16 || &#039;&#039;&#039;Loop flag&#039;&#039;&#039;. -1 if it loops, 0 if it doesn&#039;t.<br /> |-<br /> | 0x10 || UInt32 || &#039;&#039;&#039;Sample rate&#039;&#039;&#039;.<br /> |-<br /> | 0x14 || UInt32 || &#039;&#039;&#039;Total number of samples&#039;&#039;&#039;.<br /> |-<br /> | 0x18 || UInt32 || &#039;&#039;&#039;Loop start&#039;&#039;&#039; in samples.<br /> |-<br /> | 0x1C || UInt32 || &#039;&#039;&#039;Loop end&#039;&#039;&#039; in samples.<br /> |-<br /> | 0x20 || UInt32 || Seems to be the &#039;&#039;&#039;block size of the first [[#BLCK|block]]&#039;&#039;&#039;.<br /> |-<br /> | 0x24 || UInt32 || {{Unknown-left|&#039;&#039;&#039;Unknown&#039;&#039;&#039;. Only seen as 0.}}<br /> |-<br /> | 0x28 || Byte || &#039;&#039;&#039;Volume&#039;&#039;&#039;. Values range from 0 to 127.<br /> |-<br /> | 0x29 || Byte[3] || &#039;&#039;&#039;Padding&#039;&#039;&#039;.<br /> |-<br /> | 0x2C || Byte[0x14] || {{Unknown-left|&#039;&#039;&#039;Unknown&#039;&#039;&#039;. Only seen as 0. Probably padding.}}<br /> |}<br /> <br /> == BLCK ==<br /> A file contains many &#039;&#039;&#039;BLCK&#039;&#039;&#039; sections which contain sound data. Each block has the following structure:<br /> <br /> {| class=&quot;wikitable&quot;<br /> |-<br /> ! Offset !! Type !! Description<br /> |-<br /> | 0x00 || Char[4] || &#039;&#039;&#039;Block magic&#039;&#039;&#039;. Always &#039;&#039;BLCK&#039;&#039; in ASCII.<br /> |-<br /> | 0x04 || UInt32 || &#039;&#039;&#039;Sound data size&#039;&#039;&#039; per channel in bytes.<br /> |-<br /> | 0x08 || UInt32 || {{Unknown-left|&#039;&#039;&#039;Unknown&#039;&#039;&#039;, only set when audio format is ADPCM.}}<br /> |-<br /> | 0x0C || UInt32 || {{Unknown-left|&#039;&#039;&#039;Unknown&#039;&#039;&#039;, only set when audio format is ADPCM.}}<br /> |-<br /> | 0x10 || Byte[0x10] || {{Unknown-left|&#039;&#039;&#039;Unknown&#039;&#039;&#039;. Probably padding to align sound data.}}<br /> |-<br /> | 0x20 || Byte[][] || &#039;&#039;&#039;Sound data&#039;&#039;&#039;.<br /> |}<br /> <br /> == Tools ==<br /> The following tools can handle AST files:<br /> * [[Wexos&#039;s Toolbox]], by [[Wexos]]<br /> <br /> [[Category:GameCube File Formats]]<br /> [[Category:Wii File Formats]]</div>

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