Music: Difference between revisions

Music (view source)

Revision as of 02:34, 18 April 2019

153 bytes added , 18 April 2019

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MattKC

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 Music is stored in Lego Island SI files. SI files are derivatives of the {{Wikipedia|Resource Interchange File Format}} best known as the basis of AVI and WAV files.
-All music appears to be 11025Hz Mono Signed 16-bit.
+All music appears to be 11025Hz Mono Signed 16-bit. All bytes are little endian.
-Music appears to begin with a <code>MxDa</code> and is split into chunks of <code>MxCh</code>. The <code>MxDa</code> header contains information about the PCM audio in the <code>MxCh</code> chunks.
+Music appears to begin with a <code>MxDa</code> and is split into chunks of <code>MxCh</code>. The <code>MxDa</code> header contains information about the PCM audio in the <code>MxCh</code> chunks. The first <code>MxCh</code> appears to be information about the remainder of the chunks in the <code>MxDa</code> structure.
 '''MxDa Header Specification'''
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 | <code>MxCh</code> || 4 || Chunk Header
 |-
-| Audio Format || 26 || 2-byte Integer (Little Endian) - 1 = PCM, others indicate some form of compression
+| Sub-Chunk Size || 22 || 4-byte Integer - The remaining size of this chunk after this value
 |-
-| Number of Channels || 28 || 2-byte Integer (Little Endian) - 1 = Mono, 2 = Stereo
+| Audio Format || 26 || 2-byte Integer - 1 = PCM, others indicate some form of compression
 |-
-| Sample Rate || 30 || 4-byte Integer (Little Endian)
+| Number of Channels || 28 || 2-byte Integer - 1 = Mono, 2 = Stereo
 |-
-| Byte Rate || 34 || 4-byte Integer (Little Endian) Is equal to <code>Sample Rate * Number of Channels * BitsPerSample/8</code>
+| Sample Rate || 30 || 4-byte Integer
 |-
-| Bytes per Sample || 36 || 2-byte Integer (Little Endian) - is equal to <code>Number of Channels * BitsPerSample/8</code>
+| Byte Rate || 34 || 4-byte Integer - is equal to <code>Sample Rate * Number of Channels * BitsPerSample/8</code>
 |-
-| Bits per Sample per Channel || 38 || 2-byte Integer (Little Endian) - 8 = 8-bits, 16 = 16-bits, etc.
+| Bytes per Sample || 36 || 2-byte Integer - is equal to <code>Number of Channels * BitsPerSample/8</code>
+|-
+| Bits per Sample per Channel || 38 || 2-byte Integer - 8 = 8-bit, 16 = 16-bit, etc.
 |}