Midas XL8

50 Chapter 4: Input Bays
XL8 Control Surface
Operator Manual
Compressor graph
In the following diagrams:
• Graph A shows point of threshold and gradients of preceding and following signal.
• Graph B shows an uncompressed signal.
• Graph C shows the effects of threshold adjustment.
• Graph D shows the effects of changing knee type. Note that hard knee has hardly
any curve at all, while the knee becomes noticeably more rounded in soft knee
mode.
• Graph E shows the three graph types with signal through compressor, which depend
on signal level. These are: uncompressed; within knee area; and at full
compression.
With signal running through compressor, a coloured line follows the contour of the
shaded graph area. Line colour is dependent on signal level.
3
4
Graph with ratio applied
5
1 Input level runs along bottom edge of graph.
2 Output level runs up right-hand side of graph.
3 This portion of graph shows the side to left of
threshold (item 5). This has the original gradient of
1:1, that is, with no compression.
4 This portion of graph shows side to right of
threshold (item 5). This has the same gradient as the
ratio, that is, with compression.
5 Threshold: the point where gradient changes.
6 Graph with no ratio applied, that is, 1:1 gradient.
(What you put into the compressor, you get out.)
7 A threshold reduction will move threshold point
to left, as shown in the example in graph C (green
line). Less signal is passed 1:1.
8 A threshold increase will move threshold point to
right, as shown in the example in graph C (yellow
line). More signal is passed 1:1.
9 Uncompressed: If signal doesn’t reach
threshold (point where gradient changes), line is
green. Threshold not exceeded, so signal is
uncompressed.
10 Within knee area: If signal goes into knee area
to point where gradient changes (more obvious with
medium and soft knees), compression starts to be
applied and line colour changes to yellow.
11 Fully compressed: If signal reaches point
where gradient changes (over-threshold), full
compression at selected ratio is applied and line colour
changes to red.
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A