Hi people, Ive been writing an avi reader. The video as worked perfectly. But I have now gone onto the audio. I have managed to get the bytes of data, the waveformatex and have found out the audio is compressed. I could tell this because the use of the WORD wFormatTag in WAVEFORMATEX was causing the program to crash. So I looked up the diffrent compression types in MMREG.h and there well over 30 types and I can''t write a program to decompress them all. Are there functions publically given which can decompress audio for an avi file? thanx in advance Iain

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