Songs for Speaker Placement

@Jim-  Here's hoping it helps!

One caveat to using recorded music, as a metric for speaker placement: unless you receive a soundstage/voice placement map(with the recording), were at the performance, or actually recorded the event, you have no way of knowing if your system is recreating it accurately (no reference) .    With the LEDR, you can accurately pinpoint from where your sounds should emanate(no guesswork). 

This is a helpful diagnostic tool:  https://www.audiocheck.net/audiotests_ledr.php  The LEDR test is also available on some system set-up CDs, but-  the phase anomalies, present in some CDPs, can affect the results, as explained in this Stereophile article:     https://www.stereophile.com/features/772/index.html