Add - Key Velocities dialog box

How to get there

Choose Window > Advanced Tools Palette. Choose the MIDI tool .
Choose MIDI tool > Key Velocities. If you’re in the MIDI tool split-window, select the region you want to affect by dragging through the "graph" display area or by selecting the handlesA small square which appears on currently "selectable" elements in the score. Handles allow you to select, edit and adjust musical elements in the score. of individual notes whose MIDI data you want to edit.
Select some measures. (If you’re editing a one-staff region, double-click to enter the MIDI tool split-window.)
Choose MIDI tool > Add.

What it does

The Add dialog box’s contents change to reflect your MIDI data type selection (key velocities). Its function is to add a fixed amount to (or subtract a fixed amount from) the key velocity of every note in the selected region. Because it adds an absolute amount to every selected note, the Add command preserves the relative proportions of the existing values.

For example, you can specify that each note in a selected region should be played back with slightly more volume by adding, for example, 20 MIDI velocity units. (MIDI velocity is measured on a scale from zero, which is silent, to 127, which is very loud.)

Add ___. In this text box, enter the value you want added to the selected MIDI data values (key velocities, note durations, or MIDI controller settings) of all selected notes. Note that in any of the examples below, this value can be a positive or negative number. The number in this text box represents the number of MIDI velocity units you want added to every note in the selected region; MIDI key velocity is measured on a scale from zero, which is silent, to 127, which is very loud.
OK • Cancel. Click OK to confirm, or Cancel to discard, the MIDI data changes you’ve specified. You return to the MIDI tool split-window (or the score).