Lizzo SPECIAL album - prerecorded compact cassette (no evidence of Dolby NR):
(I bought this cassette today at Vintage Stock, I've seen a few other prerecorded cassettes there, but they weren't albums I was interested in)
Thru DPL2 music (played with a Sony CFD-S70 Boombox) - modest surround effect - in a few songs, the backing vocals were mostly in LB&RB.
(I'm making a DVD-R of my cassette [for personal use], I'll try it on my DynaQuad system later)
edit: Once again, the DynaQuad "decoding" was better than DPL2, the surround channel had content during all the songs and in a few cases could be mistaken for discrete 3 channel surround sound (too bad the receiver makers don't include a "no frills/basic" surround sound decoding mode that is DynaQuad [with all the surround speakers receiving the same audio - no THX type "decorrelation"]).
Kirk Bayne