Specifications

A DJUSTING THE SETTINGS
Adjust the sliders by dragging in the appropriate direction.
You can also left-click or right-click on the sliders value
text to increment or decrement the value.
C ONTROLLING THE G RAPH
Select which graph lines to display by clicking the buttons in
the display control box. “EQ+SEQ” shows the combined
response of EQ and Sub-EQ. “Orig” shows the original
response corresponding to the effect settings when you
opened the EQ Adjust add-in, before you made any adjustments.
For the GT-8, SEQ shows both the FX1 and FX2 displays.
W HAT ’ S THIS Q, kHz AND dB STUFF ?
Compared to “normal” tone controls, the EQ adjustments available are a bit more
complicated. This gives you more control over the guitar’s signal.
The Lo and Hi controls work in a similar way to standard tone controls, either cutting
or boosting the bass and treble frequencies respectively.
The cut and boost is measured in dB, which is similar to how we humans perceive
relative volume levels. Each +6dB is a doubling in signal power; so 12dB is twice
the power of 6dB, which is twice the power of 0dB. And –6dB is half the power of
0dB etc.
The mid controls have additional settings, which determine at what frequency the
cut/boost takes effect and how wide a range of frequencies is affected.
Most of the guitar’s signal is in the 300Hz to 3kHz (3000Hz) range. Human hearing
ranges from about 20Hz to 15-20kHz (depending on how old you are and how often
you’ve deafened yourself by cranking your amplifier up).
To learn what the frequencies sound like, turn on just the EQ, set the Lo and Hi to
0dB, the Hi-Mid Gain to 0dB, and the Lo-Mid Gain to +6dB. Set the Lo-Mid Q to 1,
and slide the Lo-Mid Freq left and right whilst playing your guitar. You will find this
easier if you use the GT Edit function! You will then hear the effect of boosting
different frequencies.
The Q control is a measure of how wide a range of frequencies is affected. The
higher the Q, the narrower the range of frequencies. This might seem the “wrong
way round”, but that’s just the way it is. High values of Q are really only useful for
cutting out very specific problem noises, like mains hum. Normally, you’ll find that a
Q of 1 gives you sensible results.