RAS (File Format) - Revision history

Wexos at 15:59, 11 July 2025

2025-07-11T15:59:26Z

← Older revision		Revision as of 15:59, 11 July 2025
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	'''RAS''' ('''R'''~~etroStudio~~ '''A'''udio '''S'''tream?) is a streamable audio file format used in [[Donkey Kong Country Returns]].		'''RAS''' ('''R'''etroStudios '''A'''udio '''S'''tream?) is a streamable audio file format used in [[Donkey Kong Country Returns]].

	= File Format =		= File Format =
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	\| 0x00 \|\| Char[4] \|\| '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII.		\| 0x00 \|\| Char[4] \|\| '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII.
	\|-		\|-
	\| 0x04 \|\| UInt32 \|~~\| {{Unknown-left~~\|'''~~Unknown~~'''~~, possibly number of channels or format~~.}}		\| 0x04 \|\| UInt32 \|\| '''Version number'''. Always 2 in Donkey Kong Country Returns.
	\|-		\|-
	\| 0x08 \|\| UInt32 \|~~\| {{Unknown-left~~\|'''~~Unknown~~'''~~, possibly number of channels or format~~.}}		\| 0x08 \|\| UInt32 \|\| '''Number of channels'''.
	\|-		\|-
	\| 0x0C \|\| UInt32 \|\| {{Unknown-left\|'''Unknown'''.}}		\| 0x0C \|\| UInt32 \|\| {{Unknown-left\|'''Unknown'''. Seems to be some size related to the last block.}}
	\|-		\|-
	\| 0x10 \|\| UInt32 \|~~\| {{Unknown-left~~\|'''Unknown'''.}}		\| 0x10 \|\| UInt32 \|\| '''Number of [[#Unknown\|unknowns]]'''.
	\|-		\|-
	\| 0x14 \|\| UInt32 \|\| '''Sample rate''' in Hz.		\| 0x14 \|\| UInt32 \|\| '''Sample rate''' in Hz.
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	\| 0x24 \|\| UInt32 \|\| '''Number of blocks''' per channel.		\| 0x24 \|\| UInt32 \|\| '''Number of blocks''' per channel.
	\|-		\|-
	\| 0x28 \|\| UInt32 \|\| {{Unknown-left\|'''Unknown'''.}}		\| 0x28 \|\| UInt32 \|\| {{Unknown-left\|'''Unknown''', seems to be some sort of size in bytes or samples.}}
	\|-		\|-
	\| 0x2C \|\| UInt32 \|\| ~~{{Unknown-left\|Possibly number~~ of samples in the last block.}}		\| 0x2C \|\| UInt32 \|\| '''Number of samples''' in the last block per channel.
	\|-		\|-
	\| 0x30 \|\| UInt32 \|\| '''Loop start block''' index.		\| 0x30 \|\| UInt32 \|\| '''Loop start block''' index.
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	\| 0x3C \|\| UInt32 \|\| '''Loop end sample''' into the loop end block specified above.		\| 0x3C \|\| UInt32 \|\| '''Loop end sample''' into the loop end block specified above.
	\|}		\|}

			The file has looping defined if ''loop end block index'' or ''loop end smaple'' is not zero.

	== DSP ADPCM Channel Info ==		== DSP ADPCM Channel Info ==
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	\| 0x20 \|\| UInt16 \|\| Gain.		\| 0x20 \|\| UInt16 \|\| Gain.
	\|-		\|-
	\| 0x22 \|\| ~~UInt16~~ \|\| Pred scale.		\| 0x22 \|\| Int16 \|\| Pred scale.
	\|-		\|-
	\| 0x24 \|\| Int16 \|\| Yn 1.		\| 0x24 \|\| Int16 \|\| Yn 1.
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	\|-		\|-
	\| 0x2E \|\| byte[2] \|\| '''Padding'''.		\| 0x2E \|\| byte[2] \|\| '''Padding'''.
			\|}

			== Unknown ==
			After channel infos, there is an unknown structure with the following layout:

			{\| class="wikitable"
			! Offset !! Type !! Description
			\|-
			\| 0x00 \|\| Float \|\| {{Unknown-left\|'''Unknown'''.}}
			\|-
			\| 0x04 \|\| UInt32 \|\| {{Unknown-left\|'''Unknown'''.}}
			\|-
			\| 0x08 \|\| UInt16 \|\| {{Unknown-left\|'''Unknown'''.}}
			\|-
			\| 0x0A \|\| Byte[2] \|\| {{Unknown-left\|'''Unknown'''.}}
			\|-
			\| 0x0C \|\| UInt32 \|\| {{Unknown-left\|'''Unknown'''.}}
	\|}		\|}

Wexos at 14:51, 11 July 2025

2025-07-11T14:51:03Z

@@ Line 1: / Line 1: @@
-'''RAS''' is a streamable audio file format used in [[Donkey Kong Country Returns]].
+'''RAS''' ('''R'''etroStudio '''A'''udio '''S'''tream?) is a streamable audio file format used in [[Donkey Kong Country Returns]].
 = File Format =
@@ Line 11: / Line 11: @@
 | 0x00 || Char[4] || '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII.
 |-
-| 0x04 || UInt32 || {{Unknown-left|'''Unknown'''.}}
+| 0x04 || UInt32 || {{Unknown-left|'''Unknown''', possibly number of channels or format.}}
 |-
-| 0x08 || UInt32 || {{Unknown-left|'''Unknown'''.}}
+| 0x08 || UInt32 || {{Unknown-left|'''Unknown''', possibly number of channels or format.}}
 |-
 | 0x0C || UInt32 || {{Unknown-left|'''Unknown'''.}}
 |-
-| 0x10 || UInt32 || {{Unknown-left|'''Unknown''', possibly number of channels.}}
+| 0x10 || UInt32 || {{Unknown-left|'''Unknown'''.}}
 |-
 | 0x14 || UInt32 || '''Sample rate''' in Hz.
 |}
 [[Category:Donkey Kong Country Returns File Formats]]

Wexos: Created page with "'''RAS''' is a streamable audio file format used in Donkey Kong Country Returns. = File Format = == Header == The file starts with the following header: {|class="wikitable" ! Offset !! Type !! Description |- | 0x00 || Char[4] || '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII. |- | 0x04 || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x08 || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x0C || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x10 || UInt..."

2025-07-10T19:43:11Z

Created page with "'''RAS''' is a streamable audio file format used in Donkey Kong Country Returns. = File Format = == Header == The file starts with the following header: {|class="wikitable" ! Offset !! Type !! Description |- | 0x00 || Char[4] || '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII. |- | 0x04 || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x08 || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x0C || UInt32 || {{Unknown-left|'''Unknown'''.}} |- | 0x10 || UInt..."

New page

'''RAS''' is a streamable audio file format used in [[Donkey Kong Country Returns]].

= File Format =

== Header ==
The file starts with the following header:

{|class="wikitable"
! Offset !! Type !! Description
|-
| 0x00 || Char[4] || '''File magic'''. Always ''RAS_'' (0x5241535F) in ASCII.
|-
| 0x04 || UInt32 || {{Unknown-left|'''Unknown'''.}}
|-
| 0x08 || UInt32 || {{Unknown-left|'''Unknown'''.}}
|-
| 0x0C || UInt32 || {{Unknown-left|'''Unknown'''.}}
|-
| 0x10 || UInt32 || {{Unknown-left|'''Unknown''', possibly number of channels.}}
|-
| 0x14 || UInt32 || '''Sample rate''' in Hz.
|}

[[Category:Donkey Kong Country Returns File Formats]]