“..actual classical music insinuated subtly into the cartoons...”
And that’s the amazing thing about it - it was ALWAYS there, in the background, as if it had been written SPECIFICALLY FOR the cartoons...
Music that had been around for centuries, and the Masters of Mayhem - Chuck Jones, Bob Clampett, Friz Freleng - just made those cartoons and the music SEAMLESSLY flow together.
And as a result, in our young minds, we were exposed to GREAT music of the ages, and absolute comedy insanity on the screen together.
It’s what made it work... and work SO well, that here we are, decades hence, STILL chuckling about it.
Again, the miracle of the Internet lets you get to relive it for a little while.