User manual

Getting Started
®
IEM User Manual
4
Section 1
IEM
The following illustration shows how audio signals flow through the IEM.
Multiband compression/limiting is a three-step process. First, a crossover is used to separate
the audio into different frequency bands. Next, separate compressors/limiters process the indi-
vidual bands. Finally, the bands are summed back together. Because these bands contain dif-
ferent amounts of energy, they can be compressed using widely varying settings. The end result
is that parts of the mix, the low frequency bands for example, can be compressed or limited
more heavily than if a single compressor was used on the entire mix; thereby, allowing greater
control over the output level.
The easiest way of setting up the multiband compressor in IEM is to use the monitor in con-
junction with the crossover and the compressor/limiter.
The Monitor page allows the engineer to toggle the monitor position between the main L/R and
individual bands both pre and post processing. By rotating the DATA WHEEL, the monitor posi-
tion is changed.
The crossover page shows the crossover points as well as their slopes. The crossover points can be
adjusted by rotating the DATA WHEEL and using the NEXT PAGE and PREV PAGE buttons to
move between different crossover points. The slope can be changed by pushing the DATA WHEEL
to move to the slope parameter line. Turning the DATA WHEEL changes the slope of the crossover.
Changing the crossover slope changes the way the frequency bands interact. For example, a
broader slope, e.g. 6 dB/Octave, allows the adjacent bands to have much more interaction than
a slope of 18 dB/Octave. Broader slopes provide a more seamless transition between bands, while
steeper slopes allow tighter control over a particular band.
Setting up your compressor/limiter is similar to setting up your crossover. You can listen to how
the compression or limiting is affecting the individual bands by monitoring them both pre and
post processing.
The Compressor page gives the engineer control over all the parameters that are needed to adjust
the multiband compressor. The Multiband compressor can be adjusted either as a unit or the
individual bands can be adjusted separately. By pushing the DATA WHEEL, the different
analog
input
analog
input
meter
TSE
meter
analog
input
control
digital
input
control
digital
input
digital
input
meter
gain
reduction
meter
TYPE IV™
Conversion
digital
output
meter
anal
o
outp
u
met
e
analog
output
control
DSP (Software - Based)
Operations
Bypass
Clone Bypass
(push and hold Bypass for 2 seconds)
D / A
Convertor
A /D
Convertor
Sample Rate
Converter
Dynamics
Processor
Dither
Fig 1.2
1.3 Signal Path