Extra 2 bytes of 0 in wav header

[Unregistered]

Whenever I convert a file to wav format, there are 2 extra bytes of 0 in the header section: the 21st and 22nd bytes. According to wav format spec, these two bytes are not needed. If I open the file with CoolEdit and save it right back, the 2 bytes are removed.

Also if I do WAV->FLAC->WAV, the last file is not identical to the first file due to the 2 extra bytes.

[Spoon]

dBpowerAMP writes a WAVEFORMAT_EX header, like you said it is 2 bytes more - these are used if you create any of the Wave compressed formats.