LinPlug RMV User Manual
Page 45

Audio Modules
the degree to which the filter is closed while the sound decays (when
turned fully clockwise) or open while the sound decays (when turned
fully anti-clockwise).
Filter Thin:
The Filter Thin control is used to make the hihats sound thinner and
sharper, reducing the "body" of their sound.
LinPlug
Reference Manual 5.0.1
45