Presonus AudioBox 44VSL User Manual download pdf (Page 29)

Owner’s Manual

OverviewHookupConnecting

to a

Computer

TutorialsTechnical

Information

Troubleshooting

and Warranty

Software: Virtual StudioLive

SL Remote,

and Studio One Artist

Software: Virtual StudioLive and Studio One Artist 4

Software: Virtual StudioLive

and Studio One Artist

Virtual Studio Live 4.1

Compressor Threshold Sets the Threshold of the Compressor for the Selected Channel or Bus.

When the signal’s amplitude (level) exceeds the threshold setting, the

compressor engages. Turning the knob counterclockwise lowers the

threshold so that compression begins at a lower amplitude. The threshold

can be set from -56 to 0 dB.

Compressor Ratio Sets the Compression Ratio for the Selected Channel or Bus.

The ratio sets the compression slope, which is a function of the output

level versus the input level. For example, if you have the ratio set to 2:1,

then for every 2 dB of level increase above the threshold, the

compressor’s output will only increase 1 dB. The ratio can be set from 1:1

to 14:1.

Compressor Attack Sets the Compressor Attack for the Selected Channel or Bus.

Attack sets the speed at which the compressor acts on the input signal. A

slow attack time (fully clockwise) allows the beginning component of a

signal (commonly referred to as the initial transient) to pass through,

uncompressed, whereas a fast attack time (fully counterclockwise)

triggers compression immediately when a signal exceeds the threshold.

You can set the attack from 0.2 to 150 milliseconds.

Compressor Release Sets the Compression Release for the Selected Channel or Bus.

Release sets the length of time the compressor takes to return the gain

reduction back to zero (no gain reduction) after crossing below the

compression threshold. Release can be set from 40 to 1,000 milliseconds.

Power User Tip: Very short release times can produce a choppy or “jittery” sound,

especially when compressing instruments that have a lot of low-frequency

components, such as bass guitar. Very long release times can result in an

overcompressed, or “squashed,” sound. All ranges of release can be useful, however,

and you should experiment to become familiar with diﬀerent sonic possibilities.

Compressor Makeup Gain Sets the Amount of Makeup Gain for the Compressor on the Selected

Channel or Bus.

When compressing a signal, gain reduction usually results in an overall

attenuation of level. The gain control allows you to restore this loss in

level and readjust the volume to the precompression level (if desired). You

can adjust Makeup Gain from 0 dB (no gain adjustment) to +28 dB.

Limiter On/Oﬀ Turns the Limiter for the Selected Channel or Bus On or Oﬀ.

When the limiter is engaged, the button will illuminate. The threshold for

the limiter is set to 0 dBFS. The ratio is ∞:1.

The limiter is available for all input and output buses.

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Presonus AudioBox 44VSL User Manual Page 29

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