I've been listening to the 1968 BBC radio dramatization of The Hobbit and wow is it a bit jarring. Having grown up with the music from the animated 1977 Rankin and Bass production, hearing the poems and songs performed with different melodies and cadence is an "uncanny valley" level of weird.

Gandalf in the BBC radio version is voiced by Heron Carvic who was also the voice of Morpho in William Hartnell's Dr Who episode The Keys of Marinus, and man is it strange him not sounding like John Huston or Ian McKellen! His sinuous voice is strange enough to make you think "wizard" but different enough from all the other versions of Gandalf I've ever heard that its taking some getting used to.

Paul Daneman voices Bilbo and does a fantastic job of it. I wasn't familiar with him from much else when I looked him up but I do see he played Dr Bellfriar in the Blake's 7 2nd season episode Killer and he was Skipper in How I Won the War from 1967, the quirky anti-war sorta-comedy starring John Lennon.

I'm not sure if I'll ever get used to hearing Thorin Oakenshield referred to as "Thoreen" or Gollum called "Gol-oom".

Since I have been listening in the car I've found the dynamic balance of the audio a bit of a problem. The quiet parts are almost a whisper, easily overcome by road noise and the loud parts loud enough that I can't safely turn up the volume for the quiet parts for fear of blowing speakers on a sudden loud part. Gollum's annoying hissing grated on me enough to ruin that whole scene. That said, the story stuck fairly close to the book as far as I remember it, though being a radio program a lot of the narrative description has been removed and shifted into dialouge or though an interesting device where Bilbo is recalling the events as he's tells the tale to a friend.

https://archive.org/details/the-hobbit-bbc-radio-drama