By popular demand, we now convert ReplayGain values to Sound Check
values when transferring tracks to iPod. We also read Sound Check from
iPod and convert it to ReplayGain on-the-fly when playing a track off
an iPod in Amarok.

On the other hand, when transferring tracks from iPod to Amarok, Sound
Check from iPod is _not_ automatically copied (current limitation of
the ReplayGain implementation in Amarok), but Amarok picks up
ReplayGain information from meta-data stored inside the track. (Does
anyone know whether iTunes save Sound Check somewhere in song
meta-data?)

It is currently hard-coded that *track* ReplayGain is used (Sound Check
is not able to differentiate between track and album gains), this could
be configurable in future (but hey, micro-options!) or it could respect
Settings -> Replay Gain Mode (tricky, the setting would be read *only
when the song is being transferred to iPod*)

FEATURE: 142579
FIXED-IN: 2.6
DIGEST: volume normalization now works between Amarok and iPods