Ability to "break out" separate internal instruments onto separate "sub-channel" mix-busses
I've been loving using NAVICHORD to send MIDI to SOUNDPRISM Link Edition in AB3.
AB3 compatible Apps like SOUNDPRISM can receive MIDI separately now - for each or any of its internal instruments ( EG Bass, Chord, Melody ).
However the volume cannot be adjusted independently for each of the 3 instruments - just a single mixer fader.
It would be uber-cool if in a future AudioBus 3 API it was possible to break out the individual instrument output channels to separate faders - so in the MIXER page there would be (optionally) an individual fader for SoundPrism (BASS) another for (CHORD) and another for (MELODY).
Clearly this is some sort of Multichannel out API - as opposed to stereo.
Such a feature would also clearly be very useful for when hosting Gadget.