If I have, for example, 5 tracks:

 
... and I want to select all tracks, just double-click on a track, ok:

 
To deselect a track, I must Ctrl+Left Click, on the pencil icon, right? 
Doing this, for example, in track 2, as in the image below, apparently nothing happens.

 
But if I switch the focus to another track, then track 2 will appear deselected:

 
This creates a lot of confusion.
But the worst is not that. If I try to deselect the current track (the one containing the focus), nothing happens, even though I shift focus to another track.
That is, deselecting the current track does not work. A bug.
And the rest, it just gets in the way.

I'm not sure I understand the problem. The new PRV is more about selecting the track(s) you want to edit rather than forcing you to de-select the ones you don't. 

PRV could also be used to get an overview of all notes, from all tracks.
But for example, I want to see all the instruments from the orchestra EXCEPT the harp. The logical way in the current PRV is to select all tracks and then deselect the harp track.
It is at this point that the technical difficulty begins, something that did not exist in the previous PRV.
As I said, it is more difficult and more confusing to select / deselect tracks.

rogeriodec
 
But for example, I want to see all the instruments from the orchestra EXCEPT the harp. The logical way in the current PRV is to select all tracks and then deselect the harp track.
It is at this point that the technical difficulty begins, something that did not exist in the previous PRV.

Okay, now I understand what you want. As far as I know it is not possible to do that. The reason I didn't understand is because my main use for the PRV is editing. It sounds like what would be ideal for you is the ability to treat the PRV also as a "view filter," not just an "editing filter."

Anderton
 
Okay, now I understand what you want. As far as I know it is not possible to do that. The reason I didn't understand is because my main use for the PRV is editing. It sounds like what would be ideal for you is the ability to treat the PRV also as a "view filter," not just an "editing filter."

Besides view and edit, also scrub notes (hotkey "J") is something I use a lot. In this case, for example, I want to hear all the strings except the harp.
As I've shown before, yes, it is possible to unselect one or more tracks with Ctrl+Click, but this today is MUCH MORE WORK than in the previous version.

The new PRV, although for the most part a nice improvement, does impose a few new hurdles.
 
What I used to do was CTL-click the Track View to select the MIDI tracks I wanted to edit and then press ALT-3. All the tracks came up in an editable state in the PRV, but they could present a confusing rat's nest if there were many of them in overlapping octaves or overlapping notes. It was too easy to accidentally select a note in the wrong track, so to avoid that I'd often lock some tracks. The new auto-lock feature should neatly solve that problem.
 
However, it also presents new hurdles. First of all, the gray colors of the locked tracks make them impossible to distinguish from one another, and difficult to use as markers for lining up other tracks' notes. Second, I can no longer move to a different track by clicking on a note in that track. I now am required to select the track from the new Picker window. IMO the locked tracks need not be completely inert. They should respond to mouse clicks even if their events are locked in place.
 
So I've mostly abandoned the promising auto-lock feature for now. With it turned off, I can again see each track in its original color and I can move from one to the next by clicking on a note. I can also identify which track a note belongs to by clicking on it and listening to the note preview. However, that newly-selected track is not highlighted in the Picker as it should be. So if, for example, I have first-violins and second-violins in the PRV, I can click a note and tell it's a violin but not which violin track.
 
We have also apparently lost the ability to lock individual tracks. Say I want to show four tracks but lock just one of them to prevent accidental editing. Maybe I'm blind, but I see no way to do that. It seems to be "lock everything but the current track" or "lock nothing".
 
These complaints have nothing to do with rogeriodec's bug report above. He's right, it is a bug. The display should be updated as soon as the track state changes. And he's also right about not being able to de-select the currently-selected track.
 
I'm sure these will be corrected in the next update. I just hope some of the less-obvious usability issues are also looked at. Maybe CW should look into recruiting some heavy-duty MIDI composers into the beta team.
 
 

bitflipper
Maybe CW should look into recruiting some heavy-duty MIDI composers into the beta team.

I agree totally!
... but I'd rather see a heavy midi user on the pre dev. team before code is even written.
That's what's missing in my opinion.
That could have saved a lot of lost functionality and also delivered all of the new improvements.

New improvements and old fluid work flow are not mutually exclusive.

Anderton let us know a while ago that among some of the recent hires was a MIDI specialist.

mudgel
Anderton let us know a while ago that among some of the recent hires was a MIDI specialist.

The new specialist must not see that
"New improvements and old fluid work flow are not mutually exclusive."