testingwav

Each record file contain date of creation, lenght and channel name inside of body. Does anybody know how to access and edit this tags and create new wav file. I found somethin onthis page about FMT CHUNK ----------- Finally, the data chunk contains the sample data: 36 4 bytes 'data' 40 4 bytes <length of the data block> 44 bytes <sample data> ----------- Thanks in advance!