Rachmaninoff, Symphonic Dances, performed by the Dallas Symphony Orchestra under the direction of Donald Johanos, as recorded by Vox in 1967 with a two microphone set up.
In 1970 every HiFi shop in the country had a copy of the LP to use for demos. It is available on CD if you don't have the LP or don't want to pay collectors prices for the vinyl. It is one of the best orchestral recordings ever made.