Source-audio Soundblox Pro Classic Distortion Pro Instrukcja Użytkownika Pobierz pdf (Strona 4)

Theory of Operation | 76 | Theory of Operation

MIDRANGE control

This control provides

12 dB of cut or boost to a midrange frequency band

which is approximately two octaves wide. The exact frequency is different

depending on which distortion has been selected.

Graphic EQ

The

7-band graphic equalizer can be adjusted in 1 dB steps. Moving

bands up or down

1 dB can make a signicant change to the sound.

So don’t think that you have to make big adjustments with the

EQ. The

graphic

EQ is at the end of the processing, after the distortion.

CLEAN BOOST / EQ

In this setting, the distortion curves are straight lines (meaning there is

no distortion). The graphic

EQ can be adjusted to taste. The MIDRANGE

control is also still active in this mode. The

DRIVE controls will need to be

set around

9 o’clock to ensure that the signal doesn’t clip. Although the

distortion curves are at, there still comes a point where the signal will

clip if the

DRIVE is turned up too far.

If both

DRIVES are turned up, there will be a raspy sound as the signal

peaks are hard clipped. In general, this doesn’t sound very good. How-

ever, if the

DRIVE controls are cranked, the resultant distortion is not bad

at all despite consisting only of digital hard clipping. Don’t believe that?

Give it a try. This distortion sound can be improved by rolling off the

MID-

RANGE

control and using the graphic EQ to further shape the sound.

THEORY OF OPERATION

The Classic Pro features distortion effects that are re-creations of popu-

lar pedal and amplier based distortions. We have chosen names for the

distortions that will be suggestive of the sounds you will get with all of

the controls in the central part of their range. We are not trying to imply

exact simulations of the various analog effects. Rather, this is a different

take on classic sounds based more upon evaluating the sounds by ear

and overall circuit function instead of attempting to do a mathematical

model or emulation (which, incidentally, we think is really not possible

for distortions).

The following list describes the major new features available in the

Classic Pro:

Architecture

Most analog fuzzes and distortions have multiple points where the signal

passes through a distortion circuit, an op-amp, a transistor, or a diode.

We provide two such cascaded distortion functions, each with a

DRIVE

control in front of it. The

MIDRANGE control sits between the two distor-

tions. The graphic

EQ is at very end of the chain.

DRIVE controls

The DRIVE knobs control the gain of the two distortion curves. You can

obtain the same amount of overall gain through the system with various

combinations of the two controls: one high and the other low, both in the

middle, etc. However, the resulting sound will be different. Distortion

from

DRIVE 1 has more EQ applied to it than the distortion from DRIVE 2.

Essentially, you just have to experiment and listen to the results.

If the

MIDRANGE control is increased, a hotter signal will be applied to

the second distortion curve and you might need to reduce

DRIVE 2

accordingly. Maxing out both

DRIVE controls will probably be excessive.

Most of the distortion avors sound better with more moderate

DRIVE

settings. DRIVE 1 and your guitar volume both directly control the signal

applied to the rst distortion curve. Using a higher setting of

DRIVE 1, you

can set your guitar volume quite low for a cleaner tone and increase your

guitar volume when you need more distortion.

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