Mackie 8Bus Manuel d'utilisateur télécharger pdf (Page 164)

D8B Manual • Appendices • page 158

Using the Mackie Effects (MFX)

The Digital 8•Bus comes with one MFX card

installed to provide two stereo effects. Three

additional MFX cards can be installed for a total of

up to eight mono-in, stereo-out internal effects

available simultaneously.

The console ships with the Mackie FX (MFX)

plug-in installed. This plug-in provides five useful

effects that can be globally selected and used with

the aux sends and FX returns.

Each effect has a 3-Band Parametric EQ

which filters the signal prior to the actual effect.

3-Band Parametric EQ

Click the EQ button in the lower right corner

of the Mackie Effects window to turn the EQ on

and off. This provides a low-shelving filter with a

corner frequency at 100 Hz, a mid-band fully

parametric EQ, and a high-shelving filter with a

corner frequency at 10 kHz.

Click the EDIT button to change the EQ

parameters.

Low Shelf Gain: This adjusts the boost and cut

below 100 Hz. This is calibrated in decibels (dB),

with a range from –12 dB to +12 dB.

High Shelf Gain: This adjusts the boost and

cut above 10kHz. This is calibrated in decibels

(dB), with a range from –12 dB to +12 dB.

Mid Gain: This adjusts the boost and cut at

the mid-frequency setting. This is calibrated in

decibels (dB), with a range from –12 dB to +12 dB.

Mid Frequency: This adjusts the center

frequency of the parametric EQ. This is calibrated

in Hertz (Hz), with a range from 100 Hz to 10 kHz.

Mid Q: This adjusts the bandwidth of the

frequencies affected by the parametric EQ. It is a

unit-less measure, with a range from 0.1 to 10. A

low Q setting provides a very tight bandwidth (less

than an octave), and a high Q setting provides a

very wide bandwidth (covering several octaves).

Effects Type

Click on the TYPE control to select the type of

effect you want to use.

Reverb

This uses a room reverberation algorithm that

provides the following controls:

Size: This adjusts the time between reflec-

tions to simulate different room sizes. It is cali-

brated in meters (m), with a range from 3.0 m

(small) to 40.0 m (large).

Decay: This adjusts the amount of time that

reflections continue to propagate. A “live” room

will have a longer decay time than a “dead” room.

It is calibrated in seconds (s), with a range from

0.9 seconds to 2.0 seconds.

PreDelay: This adjusts the amount of delay

between the dry audio signal and the start of the

wet reverberant signal. Adjusting this control can

provide better separation and definition to the dry

signal. It is calibrated in milliseconds (ms), with a

range from 0 ms to 299 ms (0.3 seconds).

Diffusion: This controls the increase in echo

density over time in the reverberant signal. The

higher the diffusion setting, the higher the echo

density. This is a unit-less measure, with a range

from 0 to 10.

Damping: This control causes the higher

frequencies to roll off faster than the low frequen-

cies. The higher the damping setting, the faster

the high frequencies roll off. This is a unit-less

measure, with a range from 0 to 10.

Rolloff: This adjusts the cutoff frequency for

rolling off the entire reverberant signal. This is

different from the damping control which rolls off

only the higher frequencies over time. It is cali-

brated in Hertz (Hz), with a range from 500 Hz to

20 kHz. It also has a Flat position, which bypasses

the control.

Mono Delay

The mono delay effect provides an adjustable

delay, which is returned to the left and right stereo

effect return. It also provides an adjustable

feedback path for a multiple echo effect. The mono

delay has the following controls:

Delay: This adjusts the amount of time

between the original signal and the delayed signal.

It is calibrated in milliseconds (ms), with a range

from 0 ms to 1599 ms (1.6 seconds).

Feedback: This adjusts the amount of signal

that is fed back to the input of the delay. It is

calibrated in percent, with a range from 0% to 99%.

Rolloff: This adjusts the cutoff frequency for

rolling off the feedback signal. It is calibrated in

Hertz (Hz), with a range from 500 Hz to 20 kHz. It

also has a Flat position, which bypasses the control.

Stereo Delay

The stereo delay effect provides independently

adjustable delays which are returned to the left

and right stereo effect return. It also provides an

adjustable feedback path for a multiple echo

effect. The stereo delay has the following controls:

Left and Right Delay: This adjusts the amount

of time between the original signal and the

delayed signal. It is calibrated in milliseconds

(ms), with a range from 0 ms to 799 ms (0.8

seconds). Notice that the stereo delay effect has

precisely one-half the amount of delay available

per channel as the mono delay.

Left and Right Feedback: This adjusts the

amount of signal that is fed back to the input of

the delay. It is calibrated in percent, with a range

from 0% to 99%.

Rolloff: This adjusts the cutoff frequency for

rolling off the feedback signal. It is calibrated in

Hertz (Hz), with a range from 500Hz to 20kHz. It

also has a Flat position, which bypasses the control.

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Mackie 8Bus Manuel d'utilisateur Page 164

Commentaires sur ces manuels

Mackie 8Bus Manuel d'utilisateur Page 164

Commentaires sur ces manuels

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