Equalization for music

Applications

The Graphic Equalizer is designed not only for use in preventing feedback and equalizing uneven room frequency response to be flat, but also for equalizing frequency response to your tastes and producing favourable sound for you. Fig. 1 shows each frequency band and its corresponding auditory feeling. Fig. 2 and Table 1 show the relation between each musical instrument and its frequency band. They can be of great help in the equalizer operation. (They are referenced from a book entitled "Practical Guide for concert")

EQUALIZATION CHART

These sounds

The

rythm section

Probably

the most

Upper

vocal

re-

Presence

range.

Sibilance levels

are felt

appears here. Either

important

all.

gion.

Too

much

Great achievement

can be

con-

than

really

a fat or thin sound

Most

all

instru-

here

will

cause

overall

level

can

trolled

here.

heard.

They

can

be heard by

ments

contain

great

fatigue,

and

had

here.

Too

Bright,

clean

give a sense of

mis-EQ here. Too

harmonics here.

loose

speech

in-

little causes a

"far

definition.

power.

Too

much

becomes

300Hz boosting can

telligence.

Re-

away" sound.

much produces

boomy. Bass guitar-

cause

horn-like

ducing

can

a muddy sound.

Snare-Toms.

sounds.

1k to

bring

vocals

sounds

tinny. Too

top.

much here sounds

Figure 1

like the telephone.

INSTRUMENT CHART	INSTRUMENT EQUALIZATION CHART
	Acoustic guitar	Bass strings resonate between 70 to 120Hz, body
		around 300Hz. Avoid boosting these to stop feedback.
		3kHz and 5kHz gives great "clarity".
	Electric guitar	Resonances differ — depending on type. Good full
		sounds around 300 to 500Hz. Clarity at 3kHz.
	Bass guitar	Extreme lows are at 60 to 90Hz. "Pick" or "pluck"
		sounds are around 800 to 1200Hz. Upper harmonics
		clarified about 3kHz.
	Human voice	Good fullness at 150Hz. Watch for "boominess" around
		250Hz. Mid-range 10kHz.
	Piano (Acoustic)	Bass strings resonate around 100Hz. Watch for sub-
		harmonics at 30 to 50Hz.
	Piano (Electric)	Good mid-clarity at 3kHz to 5kHz thins out rapidly in
		high end. Be careful around 1.5kHz to 2.5kHz to avoid
		the "bar room sound".
	Organ	Usually dies under 200Hz. Has great mid-sounds
		around 1200 to 2000Hz. Top end cuts off at 6kHz.
	Violin	Richfullness at 400Hz. Natural mids around 1500 to
		2500Hz. Avoid "scratch" sounds at 8kHz.
	Brass instruments Watch for "hot" mids around 2kHz. Low end boost
		around 400Hz. Top end clarity at 6kHz.
	Bass drum	Great low "kick" at 40Hz. The mids at 2kHz gives the
		familiar "punch".
	Snare drum	Good fullness at 100Hz. The "crack" is boosted at 2kHz.
		real easy. The snares extend to above 4kHz.
	Tom Tom	The main fullness is around 200Hz. The mid punch
		extends to 4kHz.
	Floor Tom	Same as tom, but extends down to 80Hz.
	Hi Hat	Watch for the "gong" sound around 300Hz. Good
		"shimmer" sounds are around 8kHz to 10kHz.
	Cymbal overhead About the same as hi-hat only has more low end around
		150Hz.
	Talk Box	Depending on the guitar sound driving it and the reso-
		nance of each player's mouth, should have great "bite"
		around 1200Hz and dies above 6kHz.

Table 1

Figure 2

— 10 —

E111 specifications

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Applications