Possibility to use hybrid plugins on a bus

[milasudril]

Is it possible to connect MIDI to audio filters, that are accepts MIDI input (vocoders, MIDI controlled filters) in qtractor? If not, that would be a great improvement.

[rncbc]

only MIDI tracks and buses do convey MIDI data and audio; audio tracks or buses deal with audio and only audio; you may work with either audio or MIDI Inserts, Aux-sends pseudo-plugins that let you route, send/return externally (inserts) and fork internally (aux-sends) the audio or MIDI signal around.

[milasudril]

Maybe I should add a figure that illustrates the scenario:

                  +--------+
  MIDI track----->|        |
                  | Filter |----->Audio bus
  Audio track---->|        |
                  +--------+

I guess that this is not possible without loading the plugin in an external host, since this would require placing audio data on a MIDI track.

Maybe this is related to #24. Ardour uses multipurpose buses, and I really like that system. The fader is connected to the audio bus. For the purpose of editing MIDI channel volume, there could be some kind of option per fader. I would like to have a sequencer like Qtractor, with the bus system from Ardour