Extra channels on VST

Can anyone explain why when a VST instrument is loaded, there appears to be more sub channels loaded for them i.e. kontact4 a kontact4 b and so on. Any changes can only be made on the ‘a’ channel anyhow, if channel is not the right word please excuse me!

With Kontakt 4, there are several different .dll versions. I believe one for 4 out, 8 out, and 16 out. When you load one of these, I think Cubase needs a channel for each activated output.

Thanks Jaslan!