Trierweiler and Beier, Two Decades (1983)

 

Information for this release here. You can see their other album is quite similar.

Basically it's an interesting mix of trombone (Trierweiler) and various keyboards (Chris Beier) with differential sounds but usually quite laidback and ambient with both of the two contributing compositions. There are vibes, synthesizers playing havoc in the background, digital keys, muted trombone improvs.  Usually the actual composition, such as it is, achieves an atonal or at least dramatically complex sound with dissonant and shifty chords, as on Dark Lady: though I understand not many have a taste for this style, you can learn to enjoy the result.  There is one track that reuses some jazz cliches and tropes but luckily it's minimal.  In terms of past posts, it's most like the Apocalypse Twilight of van't Hof from long ago in feel, and equally spacey:

Definitely worth the price of admission here ($20 for used LP) and several listens to boot.