SW1000XG can apply effects to any sound that it is producing - wav, midi whatever. There are restrictions though, that I haven't quite got my head round yet. e.g when you use midi, you can apply individual (and different) levels of chorus, reverb etc. to each and every channel. When it comes to your channels of stereo audio, you have insertion effects and variation effects. From my understanding you set the insertion effect to one of the dozens of effects (e.g. phaser) and you set the variation to another effect (e.g. celeste). Then, insertion can be applied to ANY audio channel (e.g. your .wav file being played), and the variation can be applied to (I think) a couple of channels. If anyone knows more on this, please post.
As far as I know, the knobs on the Keyfax Phatboy can ONLY affect MIDI signals. Midi is completely seperate from the playback of audio wav files, so it wouldn't work.
The only way I could see this kind of thing happening (again, i'm guessing) is if your wav files were put on a sampler. Then, because the sampler is MIDI controllable, you could set the PhatBoy up to controll the midi signals for filters etc.
Any help?
Rob