Universal Knob
Adjust waveform brightness: While the light above the knob is
dark, revolving the knob will adjust the brightness of the waveform,
which ranges from 30% to 100%. Turning clockwise means
increase while anticlockwise means decrease. You can also
select "intensity" in "DISPLAY" menu and then revolve the knob to
adjust the brightness of the waveform.
Universal knob: When the light above the knob is on, you
could revolve the knob to select between submenus under the
current menu and press it down to select the current submenu. In
addition, it can also be used to modify parameters and input
filename.
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