Delete doubles
CTRL-D
This function
is an additional feature of MIDI Locator full version and
can be used to delete unnecessary MIDI events from your MIDI sequence.
Those doubles could be found in foreign MIDI files which you got
maybe from the internet or they could be remaining identical controller
events after using MIDI Locator's functions set controller
events
and controller
value.
Please create a selection which covers an area of MIDI events
on the workspace window before you use this function. The whole
file is searched in any case, but only events in your selection
will be named as deletable.
If you don't have a clue what delete doubles could be :
let's watch an example. Imagine we downloaded a foreign .mid file
on a MIDI file site of our interest. Now we load it inside MIDI
Locator and - what's that ? Some tracks seem to flange or
to be unreasonable louder than others. If we look in one of those
tracks, we see the following events :
We see that some Note On events appear twice or more at the same
MIDI tick position. And if we scroll thru the whole track, we
see that those are hundrets of notes. The author of this songs
got only basic knowledge about creating MIDI files. He thought
he could make tracks louder by copying their content over themselves.
Instead of making all other tracks softer by adjusting their Note
On event's velocity (databyte 2) or channel's main volume or expression
controller. But that guy was a good composer, so we want to keep
this song - in any case. Instead of deleting fourthousand double
Note On events we can use this delete doubles function.
Another example :
We got a .mid file which includes a Control Change event 'main
volume' with a value of 100. This event comes direct after a GS
reset. The MIDI specifications say that all 16 main volume controllers
will be set to 100 after a GS reset event. So why is this event
in that file ? It is an unnecessary double.
So there are tons of possible double situations (program changes
to piano after a reset, identical panorama adjustments at the
edges of several measures which didn't change the panorama and
so on). The delete doubles function of course recognizes
side effects which could be created by intention. E.g. would an
obvious double Program Change of a drum channel not be named for
removement if only a single drum parameter has been changed before
it, because the Program Change would (should) reset all drum parameters
of the active drum map.
The types of real doubles are named if they are found :