Re-assigning a synth with per-output Instrument Tracks

[msmcleod]

This topic came up in a discussion earlier... 

Say you've inserted 16 per-output instrument tracks (i.e. 16 instrument tracks all sharing the one synth instance), and you want to replace the synth for only ONE of the tracks.  The normal replace-synth workflow will replace that single synth instance, meaning it'll affect all 16 of your tracks... which isn't what you want.

The way around this is:

1. Duplicate the track you want to change
2. Re-assign the synth on the duplicate track
3. Delete the original track