Whenever TuneLab Pro listens to a note to measure inharmonicity, it also measures the relative strength of the partials. These relative strengths can be used to measure the effect of voicing. In the display above, the amplitudes in black were from a previous measurement of C3. The current amplitudes in white are from a measurement of C3 with the una-corda pedal pressed. The difference in voicing between these two notes is apparent.