"These days, you can get test tracks as either compact discs (CDs), downloadable tracks or applications. The driving force behind Reference Recordings (RR) is Keith de Osma Johnson (KOJ). He makes some of the very highest-quality music recordings you can find. On the Enjoy the Music.com scale, they rank three and four Blue Notes for Very Good and for Excellent Performance. They really do offer "The Best Seat In The House.""Three of Johnson's latest releases now join my reference stack. That stack morphed over the years to a hard disk, now a USB flash drive. Soon I will simply point my phone at a player and pull the tracks from the internet cloud."In any form, my list still includes RR's Dick Hyman's From the Age of Swing. This bopping disc is still one of RR's all-time bestsellers and for good reason. The quality and upbeat tempo of this disc – along with alto, tenor and baritone saxophones, trombone, trumpets, string bass and piano samplings (but no vocals) – make it excellent test tracks [RR-59, $16.98]..." — A. Colin Flood, EnjoyTheMusic.com
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