One MIDI channel equals one track?

An Instrument Track often used for a single MIDI Channel. But some VSTi’s (e.g. Halion 6, Reaktor, etc.) support multi-instruments where you can have different sounds on each MIDI channel. So you can have up to 16 Channels on a single Track. However these multi-Instruments are often used as 1 Track, 1 Channel just because that’s easiest.

The MIDI Channel a note plays on can be set or modified in several places. In the Key Ed if you select a note it will show its Channel # on the Info Line. However that might not be the channel it actually plays on. In that Track’s Inspector you can also select a MIDI Channel #. This is what notes on that Track will play on regardless of how the individual Notes are set. So if the notes in the Part were a mix of Channels 4, 5 & 6, but the Inspector was set to Channel 1, all the notes would playback on 1. But if you set the Inspector Channel to “Any” the notes would playback on Channels 4-6.

Now I do not have a synthesizer background (have never owned one) but rely on the synthesis produced by the Virtual instruments,
so MIDI is not my strong point. Is a VST instrument just a software synthesizer which uses MIDI?

Regards.

Yes in most situations