After being out all day Saturday with the NW corner still pretty much untouched I have just completed the puzzle. I have to say I liked the balance between easy and hard in this. Some clues were easy to get an answer but a bit tough to figure out the parsing. To be honest I would have helped myself if I hadn't gone straight in with a different musical style (perhaps more of a genre) for 25a that fits perfectly with the crossers until you get 23d. I decided I'd parse it later because it must be right. Then after deciding 23d was impossible I realised my error.
There were also a couple of words I had not heard of but all in all a good puzzle I thought.
FOI was 1a which would be a contender for COD also. But I'm going for 13a but as one of many well constructed clues. LOI was 9a.