Yes thats a great site…have a small collection myself. Also last 3 days of this at british library. London. some great examples of old media- shame there was no catalog or publication of any kind.
I realize this post is 4 years old but I was searching for a place to stick this that seemed relevant.
Some interesting and not-so-interesting ones in there, got me thinking about the bugs that used to exist when I was a kid that just vanished… Rhinocerous beetles, colorful grasshoppers I loved to see just disappeared one day and I haven’t seen them since… If I ever knew their sounds, they’ve disappeared forever.