The attack parameter can be thought of as the time taken for the compressor to react to the presence of a signal, i.e. the delay from the
instant when you play the note to the moment the compressor actually reduces the gain. The longer the attack time/delay, the more
pronounced the beginning of each note will sound. Increasing the attack time highlights the percussive "snap" of picked, popped and
slapped notes.
The release parameter can be thought of as setting the duration of the gain reduction applied to the signal. This would be measured from
the time that compression is triggered to the point that the compressor has returned to its idle state. For maximum effect when processing
bass guitar, the release time must be set so that the compressor responds fully to every note played – in other words, short enough for the
compressor to fully recover in the time between one note ending and the next note beginning.
Turning the Att/Rel knob clockwise will reduce the release time while increasing the attack time, best for percussive playing. Rotating the
Att/Rel knob anti-clockwise will increase the release time while reducing the attack time for a smoother, more “spongy” feel.
HPF:
The HPF knob controls the cut-off frequency of a high-pass filter positioned in the compressor's sidechain circuitry. Attenuating
low frequencies from the sidechain has the effect of freeing up the low bass strings from excessive compression. This fattens the tone of
your instrument and lets the low strings breathe. Dynamic control is still fully active for the higher registers, meaning that any slaps and
pops are suitably taken care of! Turning the HPF knob clockwise will raise the cut-off frequency and free up more of the low end.
JEWEL METERING:
Simple! Red for no compression. Orange for active compression. The brighter the lamp, the greater the
amount of gain reduction. Yellow signifies that gain reduction has reached 27dB. Maximum compression occurs around 38dB.
CONNECTIVITY & POWER REQUIREMENTS
INSTR:
Insert your guitar, other instrument or signal source here. The ultra-high input impedance will even work with piezoelectric
pickups, provided that the connected lead is of sufficient quality and is reasonably short in length (a long lead will “load” a piezoelectric
pickup, reducing the bandwidth).
We usually recommend placing our pedals directly after your guitar, to maximise signal-to-noise ratio. However, in rare instances you may
prefer to place the compressor after your overdrive pedals – for instance, if you are looking to even out changes in level caused by kicking
in a range of drives.
AMP:
Connect to your amp or other pedals. The output impedance is low in all modes, so the unit will drive signals down the connected
guitar lead, overcoming the issues of high-frequency signal loss associated with passive bypass systems.
9-18VDC:
Insert power here. A high-quality regulated supply should be chosen to avoid damage from voltage surges and other over-
voltage conditions. The connector should be the 2.1mm type with the centre-pin "wired negative". For best performance, the pedal should
be powered from an 18V supply. This will increase the headroom, allowing cleaner processing of conventional guitar signals. This will also
permit the use of hotter source signals, such as active guitar pickups.
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