But it's no
big deal. Either you just remember to push the fader
at the right time, or today, using Ardour, you can
just cut out that fragment and move it to a separate
track with its own EQ and level. I find this a lot
easier than using automation.
In MusE you can leave the fragment alone and just do some automation
tweaking for it, or move the fragment as you say to its own track
with a different volume, but you must supply any desired cross-fade
automation events, it's not as advanced as Ardour.
I dunno, but perhaps for Muse it's the way like it is for Qtractor?
You need to use the mouse and move the graphic of the recordings at
the end and the beginning of overlapping tracks [1]? IMO this is much
easier than moving a virtual fader.
But ok, everything about this was written and you prefer automation,
that's ok, but you can see that some people do it without automation.
It's possible, nothing is missing.
Ralf