Hidden Midi Notes

If I am right in assuming the undupe CAL only removes exact duplicate notes, how does one remove say a short note that may be hidden behind a longer note but not necessarily the same length or start time?
Pete.

I'm afraid option one would not be a consideration as that is how I found hidden notes initially. That works for one or two notes but not for hundreds of notes. We need something like a CAL that deletes hidden notes.

Did this happen because of quantizing a track? Hopefully his trick works otherwise it might be way easier to re record the part and try a different quantizing setting. 

Another option to using Cal - which might not even work in this case, is to use the staff view.
 
Any duplicate notes in time (length is irrelevant) will appear as a double note on the stalk.
 
Click each duplicate and delete it. This will in all probability delete both notes, but don't panic - simply hit ctrl + z and just ONE of the delete notes will be restored.
 
This might be of the correct length or it might not, so go into the prv, check and if necessary slip edit to the correct length and move on to the next double.
 
Have the Staff View & Prv arranged horziontally and zoomed to the same resolution to aid navigation.

joden
I don't know why folks need to mess with Undupe and the trial and error way it operates...As I wrote earlier just use the superb tool already in Sonar... Select by filter..it is far more "surgical" and for a lot more than note removal.

 
Maybe because, say, a 3 beat-long note (with a very low velocity) might be hidden behind a 4 beat-long note? I don't know.

Select by Filter may indeed be the way to go. It all depends on what the dupe events look like, and whether they can be consistently distinguished form events you want to keep. One way to avoid problems is to cut the selected events, and drag or paste them to another track so you can see what your filter "caught" before you delete it. Just make sure the Now time is at the start of the first event before you paste or use Shift+Drag to preserve the timing. Scanning what gets selected in the Event View before cutting may also be helpful.
 
I'm not especially advocating the use of Undupe. I've never had occasion to undupe a track in anger, and have only run the CAL to see how it works. But I am a long-time fan of Select by Filter and its cousin, Interpolate (now Find/Replace).

I often encounter the same problem Pete.It would be brilliant to have a cal script that will delete duplicate notes of different lengths (ie, they have the same start time but note length varies) Surely this is not that much of a programming jump from undupe?

Joden your Edit>select suggestion is the right way to go, but if you don't know the durations of notes that in some instances, you cannot see then it's a bit difficult to set the parameters. If for some unknown reason one midi track of the same instrument and same channel has been merged on top of an existing track, how do you remove all the notes behind which are of varying start points and durations? Just to qualify my dilemma, I have been programming backing tracks for my various bands since the eighties, when sequencing and MIDI were first born (no Internet). Dinosaurs walked the street and .... just kidding. The fact is that I don't have to spend many hours programming a song if I can find a decent midifile on-line. Now, there are some amazing midifiles out there but all too often there are some that are a joke. Then there are those that are pretty good and worth fixing, but this is where the hidden note issues come in. I always say "don't re-invent the wheel". This post has gone way past the point but back in the day I had an MC500 sequencer running every keyboard that I had in my studio including a Roland S10 sampling keyboard. Those that weren't midi had a mono CV (control voltage) connection which required a midi to CV interface. My first midi module, a Roland MT32 and a Roland MC-202 handled additional instruments and The Roland TR-505 drum machine did the percussion. I remember programming Ultavox's 'Vienna'. The result, lots of analogue gear all going through various amps. Fat, fat, fat is the only way to describe it. 
Melancholy Pete :)

petgod1
If for some unknown reason one midi track of the same instrument and same channel has been merged on top of an existing track, how do you remove all the notes behind which are of varying start points and durations?

Hmmm... maybe I need to start writing in all caps.    Undupe,CAL will do this for you. It's "dumb" in the sense that it pays no attention to duration, and always deletes the later of two notes. But if the originally merged tracks are so similar that they can't easily be de-duped manually, using Select by Filter, this is probably okay. I'd have to see exactly what you're dealing to come up with a full solution that might involve multiple steps/phases.

Hey brudlefly, even if you write in caps, "there's none so deaf as those that will not hear"- LOL. Seriously though, Undupe was always my first choice, so important that I have my own keybinding for it. It's what to do when that doesn't work.

Ok, if they are of different midi channels on the same track it can be done? Cool, but what if they are not. This was a problem that I had with a project some time back. I have to move on with projects at quite a rate and this was one problem that I had had previously. Your offer to send you the midifile in question is great and will do so next time. I was about to offer that same solution to the guy struggling with Fit improvisation but we got it sorted :).

Thanks! The other issue when they are the same channel is still open to comment. I was steering away from using a quantize to bring the hidden notes to the same start time to make it easier to filter as you don't always want to do so with a well played midi track with a nice feel.

One other option, although REALLY time-consuming is to use the split notes to tracks CAL..You will end up with lots of created tracks, but it might make it easier to discern what you want to retain and discard.