Not sure why this is happening, but in Aria with GPO 4, the mod wheel only goes half-way. I can never get full volume for any sample because, though the mod wheel on my keyboard (which is an alesis QS8.1) moves through its entire range, the mod wheel in aria only moves to half way and will go no further. So, I can get no expression from a sample because I can never hear it.
Any ideas why this may be? Even the animation on the aria mod wheel only goes half way. I have to actually grab the mod wheel on the aria interface and move it with my mouse to be able to hear the sample.