TRAX is not a separate bus: it plays through the default output device and WASAPI loopback taps
that device, so the music genuinely is in the desktop bed — the Desktop ladder moving with a track
is correct, not a leak. The bay now says so on the label and in a tooltip, because two moving
ladders for one sound invites exactly this question.
No behaviour change: routing stays right (the stream hears the music once, via loopback).