Let's suggest an oldy but still on the market....TAS3103 could be a great suggestion...

It's the first that spring to mind. Worth to look at something like that.

I don't remind the whole option it provide.. but i remember it cost about 10$ USD in a 39TSSOP package, something even my dog can solder on a board


TI TAS DSPs are usually nice. I used them a lot.