Volume and output meter- Sets master volume. Keep things in the green and out of the red for best results. There are plenty of ways to get rad sounding distortion from Yellowjacket - pushing this one into the red isn't one of them.
Pan- Sets the output placement from left to right in the stereo image. This may seem like an odd parameter to include, but its intended use is when Yellowjacket's unique Keyboard "Multi" modes are used - this allows independent panning of each of the three Multi Mode Voice Panels (check out the Multi settings in the Keyboard Panel and Voice Modes section for more information).
Master- Globally adjusts tuning up or down by up to 1 semitone.
Limiter- The Limiter switch applies a transparent limiting effect to help prevent overloading. This is particularly useful with higher Keyboard section Voices settings.