Rocktron VooDu Valve Online User Manual page 22

The COMPRESSOR function is available only in configurations which display "L-
GAIN" in the configuration title.
This function allows you to compress the signal prior to the distortion stage. Com-
pression is often used to maintain an even level when using clean tones, and also to
increase sustain when using distorted tones.
The PARAMETER SELECT control will allow you to access these COMPRESSOR parameters:
COMPRESSOR I/O The COMPRESSOR IN/OUT parameter determines whether the
compressor is active for the current preset.
COMP THRESH The COMPRESSOR THRESHOLD parameter determines the input
level (in dB) at which compression will begin. Lower settings of this
parameter will result in more compression.
COMP ATTACK The COMPRESSOR ATTACK parameter determines the speed (in
milliseconds) in which the compressor will reach its maximum
compression level after the input signal has exceeded the threshold
level (set by the COMPRESSOR THRESHOLD parameter).
COMP RELEASE The COMPRESSOR RELEASE parameter determines the speed in
which compression will cease after the input signal has dropped below
the threshold level.