Since no one has guessed yet what is atypical or unusual about the recording I posted previously ,
here is a hint:
And here is the recording once more:
Beethoven String Quartet Op.59, No.3/4
Performed by ???????
CCMF artistic co-directors are not eligible for this contest (don't feel bad - I can't afford a prize for a winner anyway.) If no one guesses it over this weekend, I'll post one more hint on Monday or Tuesday. If no one gets it by then, I'll post the answer on September 3rd, three days before the Festival opens.
(Note to musicians & musicologists: the answer has nothing to do with a first-inversion Bb-major triad.)