mConnect is free and uses any NAS or streaming subscription you have. Roon though is top flight, and really great for meta data and music exploration. it's 20/month or something, a pittance really for what it brings to the table.
Roon guys iirc are originally the Meridian Sooloos software guys, and implemented a similar system decoupled from Meridian's hardware. It's like Apple OS without the Apple hardware tax. They have a 30 day trial. you can run the roon core on your mac, it's lightweight. it then pumps a stream losslessly to the MA3 which is roon ready.