(Remember that I never use the Lite On for anything other than burning.... I installed this myself as my computer's second optical drive.)
When I open the software programs that allow volume and balance adjustments, the primary volume control (as well as several other control features) affect both players' outputs in turn, as it should. I think, "That's that...!" In spite of this I study all the slider buttons (there are several pair) to see if any are unequal (out of balance), and wouldn't you know it, there is an AUXILIARY pair of volume buttons, and they are NOT set equally in balance. After the brief hot flash of embarrassment passes, I reset them, and my problem is gone.