@nosword @LarsXensen @Ninetail_foxQ Actually I think I might have misunderstood the title before ... I've seen references to it here and there, but I think I always misinterpreted 音義 in the "A & B" sense.
The 群書類従 edition of the 管絃音義 is found here: https://t.co/ad2Bdg3UyL -- Will have a (brief) look.