Light used the width of the film strip to create multitrack recordings, as opposed to the more limited two or three tracks offered by most recording studios at the time; the slightly higher linear speed provided an advantage in analog fidelity and the sprocket-driven film limited the "wow and flutter" problems associated with tape recording.

This enabled Light to record more instruments individually and adjust their audio input levels, as well as their stereo position.

It contained recordings designed to allow users to test their stereo equipment.

Like many other Command records, the Stereo Check Out came in a gatefold cover with extensive liner notes and full technical data inside.

An oscilloscope is a useful tool when used in conjunction with these tests: Side Two of this LP consists of musical selections from the Command catalogue: