OK, now here's the link again.
On the "unaltered" question, the general answer is "yes", but there are
a few things you have to look at
- Depending on the dock, you might have to set the volume to 100%,
although I'm not absolutely sure about this. iPeng itself doesn't
manipulate the data or do replay gain calculations but iOS or the dock
might do that if there is no analog volume control on the dock. In
theory, USB audio supports modes to communicate volume information
separately from the actual data (so that the actual stream doesn't
have to be altered) and since iPeng only controls the iOS system
volume I would in this case expect iOS to make use of this and also
keep it's hands off the volume. Actually I'm inclined to believe that
it's always doing this since it also doesn't volume control the
line-out used with analog docks. So to sum up: I believe the
communication will be bit-perfect independent of the volume setting
but if you want to be absolutely sure, set the volume to 100%. If you
are connecting just a DAC that doesn't have any analog control then
you should be able to check this by testing whether the volume control
in iPeng has any effect; it should not in this case.
- you need to disable iPeng's equalizer (the default) or set it to
neutral. You can find it under the player settings in "Audio".
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