This Test Record from Opus3 contains a selection of naturally recorded acoustic music from the Opus 3 catalogue. As with previous test records, it is intended as a reference for evaluating a sound reproduction unit purporting to be "genuine" high fidelity. The selection provides new examples of three important subject fields for sound reproduction: depth of image, timbre and dynamics. These three basic concepts have been linked together as a basis for evaluation of HiFi equipment. In this fourth Audiophile Test LP this release includes versions of such hits as: "House of the Rising Sun", "Try a Little Tenderness" and "Sweet Georgia Brown".