I'm a huge classical lover and I wish I could help you. You're talking about which one - the piano piece that plays as soon as Columbo switches on "fifty-two" of the later one where the other cops are waiting in frustration?
The piano piece sounds like more of that same Brahms piano concerto #2 that was playing when Markham drove the caddy to Bo's house. BTW, don't you love those 1970's night shots, that were done in broad daylight with filters? LOL
The second piece sounds like a string quartet by either Mozart maybe Beethoven. That's a tough one.
That I can't answer, because I've only heard the piece on the episode itself, and I've never been a connoisseur of clasical music, but when it comes to the "noise" Beau Williamson listened to, if you take a close look (in case you hadn't noticed this before), you'll see an actual copy of "Stephen Stills" (released in 1970) in the glove compartment of his Cadillac at the airport.
You know, the scene where a barely restrained detective behaves as if he really wants to wring someone's neck. I mean, if looks could kill....
Oh well,"love the one you're with", eh? HAHAHAHAHAHA
And if you're wondering which album, I found this:
Frank- Bravo! You got it!! That thud you just heard was me fallin' out of my seat. One aspect of Columbo that I love is that he seems to enjoy music-especially classical.