I will add that each input should have an audio gain adjustment in the input setup menu.
My turntable has by far the lowest volume output, my Oppos Bluray the highest. I can lower the Oppos output within the player, but it is a master audio control. All the apps within the Oppo also have differing gain, further muddying the waters - i wish they were each adjustable also.
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Double drywalled, "Green Glue" treated Theater
GIK acoustic treatment
Epson 8700UB Projecting on a 135" Seymour XD Audio transparent screen
Outlaw 976 Processor
Outlaw 755 amp for Center and all four surrounds
Adcom GFA 555II for Main L & R channels
Behringer EP4000 for two homemade subs
Outlaw Ultra X13 for REAL Sub Bass !
OPPO BDP103, Marantz CD63SE, Denon DP300F
2 Adcom ACE515s for AC current treatment
Newport Theater Director for AC distribution.
Speakers are all built by myself utilizing Dynaudio Drivers
Second room: Yamaha receiver, Musical fidelity X10D tubes, Carver C9 holographic pro.