In case anyone is interested.
I sorted my CDDA collection by FLAC bitrate. A lot of noise music, but this is a rock song thing, which when you listen to it, is surprising that can be FLAC'ed only down to 90 percent of PCM bitrate. For what foo_dynamic_range is worth, it measures to as much as 5.
Not a known band at all - it is from some promo sampler issued by Metal Hammer and the now-defunct (https://www.irishtimes.com/blogs/ontherecord/2009/11/16/norn-iron-music-board-shuts-up-shop-due-to-differences/) Northern Ireland Music Industry Commission.
This is certainly not the least-compressible thing I have; I have CDDA full tracks - even a full album! - that compress worse than this, but that is largely noise music, which, I admit, occupies just a tiny corner of my music obsession: With exception of an old Hypnoskull track (downloadable for free as .wav at their Soundcloud (https://soundcloud.com/hypnoskull/hypnoskull-vernetzt-iiv-2005)), everything involves Merzbow (https://merzbow.net/):
For those interested in Merzbow in lossless samples, Woodpecker No. 1 (from Pulse Demon, 1996) appears on some free samplers from the Relapse record label. The original master (free on this 194-track compilation) (https://relapsesampler.bandcamp.com/album/relapse-records-25-years-of-contamination) is less compressible than the remaster (free here) (https://relapsesampler.bandcamp.com/track/merzbow-woodpecker-no-1-remastered).
in your .wav, there are ID3 tags inside
Yes, and the format allows that.