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BASICS
Controls
Both channels of the alpha compressor are absolutely identical regarding their electronic design.
Therefore both sides of the front panel have exactly the same controls and switches. Continuative
information on the specific functions can be found on the pages in brackets.
Thresh
Direct
Threshold: the operating point of the compressor. If the input level exceeds the value set
with this controller, the compression process will start. (p. 26)
Feed Forward: switches the junction of the sidechain alternatively behind (feedback) or in
front (feed forward) of the actual compressor section. (p. 14)
Attack: the transient response of the compressor. It determines the time the alpha compres-
sor needs to reach 10 dB of gain reduction. (p. 27)
Auto Fast: a semi-automation. This function shortens the attack time automatically on fast
and loud signal impulses. (pp. 13, 27)
Release: the return phase of the compressor. It controls the period of time between when
the input signal falls below the threshold and the compressor's return to unity gain. (p. 28)
Auto Fast: similar to the Auto Fast feature for the attack parameter, this function automati-
cally shortens the release time and then returns to the set value. (pp. 13, 28)
Ratio: the relation between the input level and the output level. In feed forward mode, the
actual ratios become significantly higher than the printed values. (p. 29)
Gain Reduction: the display for the gain reduction. Shows the amount of compression mea-
sured in dB as an optical support for the acoustic events. (p. 12)
Soft Clip LED: indicates the activity of the Soft Clip Limiter. This LED should only light up
shortly from time to time in order to avoid audible distortion. (p. 19)
EQ Gain: the characteristic of the Niveau Filter. Between the mid and fully counter-clockwise
position, bass is boosted and treble is cut (vice versa in the other direction). (pp. 17, 30)
Attack
Release
Ratio
Feed Forward
Auto Fast
Auto Fast
EQ Gain
EQ Freq
SC Gain
SC Freq
On
x10
On
Hz
dB
Mix
Gain
Soft Clip
Compressed
Transformer
Thresh
Soft Clip
Gain Reduction
On
M/S Mode
Active
Channel Link
Direct
Attack
Release
Ratio
ms
ms
Feed Forward
Auto Fast
Auto Fast
EQ Gain
EQ Freq
SC Gain
SC Freq
On
x10
On
dB
Mix
Gain
Soft Clip
Compressed
Transformer
1:X
On
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