Some of us are finding the volume levels in the Miles Sound System to be very difficult to deal with. There is a bug (on my system at least) that's making that even more difficult that it would otherwise be.
Each time that you transmit on either "room"/Range or tuned voice channel, environmental sounds begin to play as though the Environment slider is set to maximum volume until you change Master, Voice, Effects, or Environment sliders on the Game Sounds panel. (*Master Volume setting is still "honored", however). After you change a slider and reset the environmental sounds to the desired volume, the next voice transmission will undo it again.
I'm sure that the crew at HTC will squish this one soon, but until they do (if you are also affected by this) you are MUCH better off always leaving the Environmental slider at Maximum, and adjusting the master volume to select the desired amount of environmental volume, and then adjusting Effects downward from there. Also, use the slider on the Voice tab to control the voice volume, the one on the Game Sounds seems to adjust the slider (both there and on the Voice panel), but not the volume itself.
Hopefully, this helps at least one other person.
<S>
(P.S. Already posted in Bugs, but thought this might help others if the workaround were posted here).
