clm chunk

The 'clm ' chunk is optional metadata in some Serum-format wavetable WAV files; plain WAV exports may omit it.

A 'clm ' payload can contain a marker such as '<!>2048' and flags for interpolation. Xfer's Serum 2 manual distinguishes plain 16- and 32-bit WAV exports without extra interpolation headers from a Serum-format selection export with extra header information. A chunk's presence identifies metadata; its absence does not prove that a packed WAV cannot be imported.