The Tuning Tools Of The Gui; Geq; Peq - zapco DSP-Z8 IV II Owner's Manual

The goal is to get the sound the artist intended, even though you are sitting in your seat in
the car, and not at a concert.To do the tuning you will need a 1/3 Octave RTA (Real Time
Analyzer) and a source of"pink noise". Pink noise is sound that has equal signal levels at all octaves.
It is a standard of reference that, in conjunction with an RTA can show you what your car is
doing to the frequency response. Then you can compensate with the equalizer. Also handy
is a 31 column sheet to chart the response before equalization.

The Tuning Tools of the GUI

You will use the EQ graph and the Function bar above for making the EQ adjustments.
Below we lay out the EQ tuning functions.
1 2 3 4 5 6 7 8 9 11 10

1. GEQ

: There are two types of Equalizer in the DSP-Z8 IV II GUI. The early EQs were Graphic
EQs. Each band had an assigned frequency and an assigned Q factor. Q determines the shape
to the filter. A low Q gives a wide adjustment and a high Q gives a narrow sharper adjustment.
In most early EQs your only adjust was the level of boost or cut that was made with the filter
band while some had adjustable Q.

2. PEQ

: More popular today is the Parametric Equalizer or PEQ. The parametric EQ allows you
to put the filter at any frequency that needs attention, so any filter can be at any frequency. It
also allows you to determine the Q of the filter, so you can boost or cut a large group of
frequencies or you can pinpoint only a few frequencies to be affected. By watching the RTA
while you are making adjustments you will see how wide or narrow the adjustment needs
to be and you can adjust the Q accordingly.