[CM] Snd 22.0

[bil at ccrma.Stanford.EDU]

Snd 22.0:

The spectrogram now notices dont-normalize.

checked: notcurses 2.4.9|3.0.0 (the latter is needed for nrepl.scm), 
sbcl 2.1.11

Thanks!: Tito Latini, Chris Chafe, Kjetil Matheussen, Woody Douglass,
	 Christos Vagias