Ok, the source is my PS3 for games/Bluray..
Optical out going into -> Astro Mixamp Pro - 3.5 analogue going into -> Sennheiser rs 220 basestation (wireless cans)
The PS3 has no volume control.
The Astro Mixamp does have a volume control.
The Sennheiser rs 220, has TWO volume controls, 1) Dial on the back of basestation 2) Digital up/down bottom on front of basestation
(dial is only operative with an analogue input as far as I know)
Question is, how should the dials be set, which vol do I max out, and which should be used to casually increase/decrease volume?