I began reading Azumanga a while back. It's a very large manga, so it took me a while to get through it. This then jogged my interest as to what the anime would be like.
The anime: Great! But there was something that always stood out to be a little more odd than usual.
As you may have guessed, the music! The music from Azumanga Daioh is completely unconventional. Instruments that are not normally used are used: reed flutes are combined with accordions, tubas, timpani's, to anything! The genre varies from a light rock to dischordal and atonal music, to random sound effects.
But, it worked! When going back and matching the manga to the anime, I could easily see how all of this music fit!
If you're interested in nontraditional music, this is a great thing to check out!
Have a musical day!