Source Audio Soundblox 2 User Manual page 9

• FREQUENCY (Green LED): Adjusts the frequency center point of the
modulation range of the filter. As the knob is turned from its minimum
position (fully counter-clockwise) to its maximum position (fully
clockwise), the center point of the frequency range moves from low to
high.
• RESONANCE (Red LED): Adjusts the width, and sometimes height, of
the various peaks and notches in the selected filter's frequency
response. As the knob is turned from its minimum position (fully
counter-clockwise) to its maximum position (fully clockwise), the
resonance setting moves from low to high, adding a more pronounced
sound. This control is sometimes referred to as "Q".
Press button to
select option
Controls: Knobs | 9