Chesky Jazz Sampler & Audiophile Test Disc Vol.1. Not only does it have an outstanding left/right/center/and beyond track but it was truly an eye(ear) opener on the track where they would play a tambourine slap miked up close, than a few feet back, than a few feet further back. Made me realize how careful I had to be when reading reviews and opinions, unless one is familiar with the recording being used for evaluation, it's all a crapshoot.