The LCF (Low Cut Filter) function cuts a low frequency to reduce a projector machine sound or roaring noise from wind, etc., therefore you can record a file more clearly.
tab - “LCF(Low Cut),” and then press
.

The menu items will be different depending on the model you are using.
or
to select “ON” or “OFF,” and then press
.
STOP to exit the menu mode. You can select one of the menu items available.
ON:
The LCF function is activated.
OFF:
The LCF function is canceled.
(Initial setting)