 knob while holding down the SHIFT key, or drag with the right mouse button, or (on the Mac), click and drag with two fingers.

<br><br><h3>About the Menu</h3>

If you mutate or recombine patches (using randomize, merge, hill-climb, or nudge) it may result in unfortunate operator frequency results.  The <b>Restrict Mutated Frequency Ratios...</b> menu lets you restrict mutation or recombination of operator frequecies so that they only result in integer values or the set provided by the Yamaha TX81Z (integer