![]() The value of telephone and wireless microphone transmission, adequate for human speech, is 8000. A typical value would be 44100, which is the same as an audio CD. This is the size of the rest of the chunk following this number - the size of the entire file in bytes minus 8 bytes, Chunk ID and Chunk Size.ġ for PCM, 2 for ADPCM, 3 for IEEE floating point, 7 for u-law, and 67734 for WaveFormatExtensible.Ĩ000, 16000, 44100, etc Hz. This chunk contains the letters "RIFF" in ASCII form. The typically canonical WAVE format starts with the RIFF header: Field A WAVE file is often just a RIFF file with a single “WAVE” chunk which consists of two sub-chunks, a “fmt” chunk specifying the data format and a “data” chunk containing the actual sample data. A RIFF file starts out with a file header followed by a sequence of data chunks. The WAVE file format is a subset of Microsoft’s RIFF specificaiton for the storage of the multimedia file. When doing the project on speech recognition, the test audio data for voice processing utilizes WAVE PCM file.įor quickly recapping the concept of WAVE PCM formay and avoiding to forget bit and pieces of this knowledge, I recorded this relevant information in this post.
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