I've got a QuNexus (actulally, a k-board, but the same from the perspective of this post), which has aftertouch/pressure midi output.
This currently controls the Mod Wheel in my bs-16i soft-synth (ios).
What I've been trying to do is enable the continuous midi data that comes from the aftertouch on the keyboard to control the volume of the note/key being played.
This seems like it would be a common thing to do, but haven't found anything on the internet about how to do it,
I have been able to change the current CC for 'Pressure' from 1 (Mod Wheel) to 7, (overall volume) and 11 (expression), but this does not properly create the effect that I want, which is to allow you to 'swell' and diminish a note's volume after the initial attack, based on a finger-applied vibrato or intensification.
The attempts I've tried so far will not enable you to increase the volume of a note beyond the initial attack velocity volume. So it you play a note softly, you can't increase the volume of that note beyond that initial soft volume by applying more key pressure.
Has anyone successfully accomplished this effect with MidiBridge?
Ok, I believe I've found somewhat of a solution to this.
I'm now using Thumbjam for iphone/ipad as my synth.
All of it's patches are customized to accomodate polyphonic aftertouch for Volume or pitch bend.
This is configurable within the Thumbjam app, and MidiBridge is not necessary.
Unfortunately, it's still not possible to increase the volume above what the initial velocity sets it at.
I read on an EWI site that the way they create this capability for an EWI is to create multiple patch layers (graduated from quite to loud, with other attributes besides just volume, such as LFO values, etc) that are called based on what the current aftertouch (or breath control, as the case may be) value is.