VST Instruments
VST instruments are software synthesizers or other sound sources that are contained within Cubase. They are played internally via MIDI. You can add effects or EQ to VST instruments.
Cubase allows you to make use of VST instruments in the following ways:
By adding a VST Instrument and assigning one or several MIDI tracks to it (not in Cubase LE).
By creating an instrument track.
This is a combination of a VST instrument, an instrument channel, and a MIDI track. You play and record MIDI note data directly for this track.