This allows to move or copy whole sections of the timline (everything
you hear) to a differnt position on the timeline.
NB. Markers and tempo-map are not yet moved, and interpolated MIDI
events are lost.
Tempo Map updates can change a region's position/length, in which case
region-automation may follow the region, and DiskReader:: playlist_ranges_moved
will save additional undo information.
These MementoCommand(s) need to be included in the undo operation.
Import via Drag/Drop previously worked by selecting a track,
and then importing to the selected track.
This approach fails when the selected track is in a track-group,
and selecting the track also selects other tracks of different type.
Now the track to drop onto is passed directly passed through to
::finish_bringing_in_material as existing_track.
This is really just an example synth (sine wave + fixed
basic ASR envelope).
Note: existing sessions using the synth are not affected, the
script is saved with the session.
Some music using square waves can inadvertently be interpreted as valid
LTC frame. However the encoded data is not a valid timecode, which can
lead huge A/V offsets, or other issues.
Tests showed
ControlSurfacesTest: Tascam US-2400
: [ERROR]: Unknown button ID "F7"
: [ERROR]: Unknown button ID "F8"
This is trying to mitigate it blindfolded.
It doesn't seem like Tascam US-2400 has more than 6 buttons, so it seems
like the profile has been incorrect since it was introduced in 937efdb6.
(But as pointed out in e6de7957, it seems like the profile often isn't
installed and button assignment thus isn't used.)
