Dynacord DSP 244 owner manual Compressor

P A R A M E T E R S

COMPRESSOR

The compressor automatically reduces level peaks above a certain threshold and therefore provides reliable protection against power amplifier clipping and damaging the connected loudspeaker systems.

Parameter	Settings / Value range	Default
Thrsh	0.27V - 8.70V	8.70V
Rat	1/1.0, 1/1.4, 1/2.0, 1/4.0, 1/8.0	1/2.0
Attack	0ms - 99ms	5 ms
Rels	50ms - 999ms	250 ms

The Thrsh parameter (Threshold) defines the level at which the compressor starts operating. Signal levels below this value are not influenced. As soon as levels reach or exceed the threshold value, the signal is compressed according to the set value of the Ratio parameter.

Ratio - Rat - determines the compression ratio - the amount which the incoming signal is compressed. For instance, a ratio of “1/4.0" means that a level change of 4 dB at the input results in a level change of only 1 dB at the output; provided that the input level exceeds the threshold level.

Attack defines the time interval, after which the compressor starts to operate. With short attack settings, the compression starts nearly instantly while with longer attack times, part of the audio signal’s impulse can pass unaltered.

Release -Rels-sets the compressor’s release time, after the signal level has dropped again below the threshold value. When the signal’s level drops below the threshold, the audio signal’s gain is processed to return to its original value. This signal processing follows an exponential curve, so that the volume change is appropriate for the human hearing. When selecting a release value that is too short, the signal level rises too fast, which also results in pumping. On the other hand, too long release times often lead to a dramatic loss in dynamic.

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