You’re right, I tryed to do some stats, and I found this. If my lookup method is right, in the collection, they are:
- 4662 iff files with a proper FORM header
- 150 iff files without a FORM but with a VHDR chunk (probably useable)
- 26 files with a BODY chunk but without a VHDR chunk. These could be loaded as raw file, without sample rate info.