Live FM radio broadcasts on WCRB of the Boston Symphony Orchestra.
I have heard some of the broadcasts on their stream, and yes, they do sound absolutely amazing. My guess is the BSO employs someone to mix sound for them, and WCRB takes a feed from it (although it's very possible it's a special mix just for radio). Either way, the method of getting that audio back to mission control (WGBH/WCRB) is top notch. There isn't much if any cascading bit reduction taking place. To the crew making this happen - GREAT JOB!