Rocktron MicroHUSH - Manual (Page 9)

HUSH Information
The Variable Integrated Release (V.I.R.) technology contained in each HUSH circuit automatically
adjusts the release rate of the expander based on the dynamic decay rate of the incoming signal. If the
input signal stops suddenly, downward expansion will occur rapidly (similar to a gate). If the input
signal decays slowly, expansion will occur slowly without disrupting the dynamic decay of the input
signal.
The THRESHOLD control should be adjusted by listening to the noise floor while not playing. Turn
the THRESHOLD control clockwise to the point where the noise floor becomes inaudible. Turning
too far past this point will cause the downward expander to attenuate the output level too quickly and
not allow the signal to decay as long as it should.