subtract one track from another?

[editdroid]

Ok...

I laid down a rhythm piano track.. then absentmindedly laid down the piano solo in the same track.. I want to separate them on to two MIDI tracks (hopefully without having to meticulously pick the pieces apart.) I can use the history window to go back and make a copy the rhythm track by itself. Is there a way to just subtract the one from the other to get the solo isolated?

Thanks..

jason

[bayswater]

The search function is quite powerful. Maybe it will let you find double MIDI notes? If so, you could mix the two tracks together, and then select the double notes with the search function and delete them.

[bdr]

Otherwise duplicate the project, go back to the original rhythm track using history in one of them then load the overdubbed track from the duplicated project. Make the original MIDI track a different color to the overdubbed track. Look at both tracks in the MIDI editor and you should be able to select most of the separate notes in the window by their different colors.

[editdroid]

Good suggestions.. will try . Thanks.

jason

[coolcolin]

If all else fails, take it to someone who runs LOGIC. Load the track in question and use the "De-Mix" Function

Colin P.

[dosuna11]

You could go back and create a MIDI file of the previous recorded track and import it back in.

[FMiguelez]

.

Didn't someone post a similar problem not too long ago?
Maybe you can find more advise if you find that thread.

[Phil O]

.

Didn't someone post a similar problem not too long ago?
Maybe you can find more advise if you find that thread.

Yeah, that would be me. I never found a good solution.

Phil

[Spikey Horse]

This is from memory but it seems about right....

Go back in history to performance 1 (before performance 2 was recorded over it).
Select it and copy to clipboard.
Come back to present in history.
Paste to a new MIDI track (obviously in the same place in the timeline).
Duplicate both tracks for safety and work with duplicates from now on.
Select track with only performance 1 on it and extend all note durations by a ridiculous amount (many bars, way longer than anything in the music)
Copy this track and merge it into other track (which already has performance 1 and 2 on it). So now performance 1 is doubled on that track with one duplicate being a ridiculously long note.
Select all of this track and remove duplicates.
From experience the ridiculously long notes durations will be kept and the short (original) note durations will get removed. (DP may be removing shorter notes by default or keeping newly added notes by default - who cares, the point is this is what we want DP to do!)
So now we are left with a track which is identical to scenario of 'performance 2 overdubbed onto performance 1 on one track' EXCEPT now performance 2 has ridiculously long note durations!
Do a search for notes using 'greater than - duration' and type in a duration value just slightly less ridiculous than the amount you dragged the notes by to extend them.
Once they are selected delete them.
Now you should be left with performance 2 only on that track.
You should have performance 1 (only) already on one of the earlier tracks which you duplicated a track from.
Voila!

It's actually a lot easier and quicker than it sounds, you can do it in a minute or two easy.

(made quick edit in last two lines in case anyone just read this and is now confused)

[Phil O]

I'm in the middle of something else right now, but when I get a chance, I'm going o try this. Thanks Spikey!

Phil