My audio interface is an ar16.
I have used the Ar16 usb New Song template.
The keyboard track records, the keyboard and the keyboard tracks play back.
The imported track bleeds strongly into the exported mix down file.
The fader of the imported wav file is turned all the way down during generation of the mixdown file.
I have tried using the mute on the track of the imported file.
Nothing I have tried will stop me from hearing the imported wav file in the mixdown file.