Yes indeed
It sounds as if you have made the VSTi Sforzando the default synth by inserting it
In the top slot on opening the window,

You must choose the melody or soloist track on the left hand side of the window

By default the window comes up with the default track selected, but you should leave this as your usual default synth in the top slot

To get single instances of synths on some channel for say melody and soloist
Next click on melody or soloist track button on the left, and the top slot will be empty this is where you put the vsti that you want to use for the melody
Then do the same for the soloist track again the top slot will be empty insert your synth.

This now means that all tracks except the melody and soloist will go to the default synth, and the melody and soloist tracks will go to their individual instances of you your selected vsti synths,

All channels will be as shown in the midi channel under options channels,

Hope this helps.

BIAB2021 UltraPlus,AsusN55S1Tbssd, W10/64,Akai EIEpro
Yamaha CVP405,SquireStrat, CoolsoftVMidSynth
Novatation Impulse61 Ctr kbd, Cwalk blab Kontakt

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