Please note: Regarding use VST as Note FX
With the release of Studio One 3.3.0, PreSonus introduced Direct Input. This gives the user the possibility to trigger one VST Instrument directly from the output of another VST Instrument or Effect, without the need of having an armed track in between.
For me personally the Direct Input covers what I missed to build serial MIDI chains with VST Instruments.
However since this request is also related to the Multi Instrument I'll leave it open.
Currently the Multi Instrument is a container receiving MIDI data on any channel, but passing it through to the VST Instruments within the container only on MIDI channel 1, in a parallel fashion. So you can’t trigger one VST Instrument with the MIDI output of another VST Instrument (serial) within the Multi Instrument. Nor can you trigger Multitimbral VST Instruments with other channels than MIDI channel 1.
To exploit the concept of a Multi Instrument, I would like to suggest a serial, multi MIDI channel implementation for the Multi Instrument. So it’s possible to trigger one VST Instrument with the output of another VST Instrument. But also being able to use Multitimbral VST’s within the Multi Instrument.
A fundamental new Note FX device might be introduced for this. I call it MIDI divider in the examples below. But basically it has to be a device able to transform/filter/replicate the MIDI channel from one number to another (e.g. input MIDI channel #1 output MIDI channel #5)
For those not fully grasping the concept, I’ve created a few basic examples to show what can be done:
This is a Multi Instrument triggering a basic VST Instrument over MIDI channel #1 and a Multitimbral VST Instrument over MIDI channel #2. The MIDI channel to the Multitimbral VST Instrument is transformed from channel #1 to channel #2. Basically this is a parallel setup apart from the Note FX.
A 3rd party step sequencer VST Instrument with MIDI out is triggering a basic VST Instrument. This is a serial setup.
A 3rd party step sequencer VST Instrument with MIDI out is triggering a basic VST Instrument on channel #1 and a Multitimbral Instrument on channel#2. Again the MIDI channel to the Multitimbral VST Instrument is transformed from channel #1 to channel #2.
A VST Instrument with MIDI output to channel #1 triggers a Multitimbral VST Instrument on channel #5. Before the signal reaches the Multitimbral instrument it’s transformed by the Note FX divider from channel #1 to #5. Parallel is a MIDI data stream to MIDI channel #2 of the Multitimbral VST. This one is also transformed by the Note FX divider (from #1 to #2).