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Can some one tell me the WAV file header information for A-Law and Mu-Law?

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You could search... google is your friend –  richarbernal May 30 '12 at 19:13

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In short, the WAVE format is a RIFF specification for mutlimedia files, which uses "chunks" to store data. Similar to a type-length-value representation, each chunk contains information about its own type and length (the fields SubChunkID and SubChunkSize) before the rest of the data.The information about the audio compression is stored in the "fmt" chunk.

Read this and this for more information.

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