PreSonus AudioBox™ iTwo Owner's Manual

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5.0 Tutorials 
5.2 
A Brief Tutorial on Dynamics Processing
AudioBox
 iOne and iTwo 
Owner’s Manual
38
Keyboards
Piano. This is a special setting for an even level across the keyboard. It is 
designed to help even up the top and bottom of an acoustic piano. In other 
words, it helps the left hand to be heard along with the right hand.
THRESHOLD
RATIO
ATTACK
RELEASE
-10.8 dB
1.9:1
108 ms
112 ms
Synth. The fast attack and release on this setting can be used for 
synthesizer horn stabs or for bass lines played on a synthesizer.
THRESHOLD
RATIO
ATTACK
RELEASE
-11.9 dB
1.8:1
0.002 ms
85 ms
Orchestral. Use this setting for string pads and other types of synthesized orchestra 
parts. It will decrease the overall dynamic range for easier placement in the mix.
THRESHOLD
RATIO
ATTACK
RELEASE
3.3 dB
2.5:1
1.8 ms
50 ms
Stereo Mix
Stereo Limiter. Just as the name implies, this is a hard limiter, or “brickwall,” setting—
ideal for controlling the level to a two-track mixdown deck or stereo output.
THRESHOLD
RATIO
ATTACK
RELEASE
5.5 dB
7.1:1
0.001 ms
98 ms
Contour. This setting fattens up the main mix.
THRESHOLD
RATIO
ATTACK
RELEASE
-13.4 dB
1.2:1
0.002 ms
182 ms
Effects
Squeeze. This is dynamic compression for solo work, especially electric 
guitar. It gives you that glassy “Tele/Strat” sound. It is a true classic.
THRESHOLD
RATIO
ATTACK
RELEASE
-4.6 dB
2.4:1
7.2 ms
93 ms
Pump. This is a setting for making the compressor “pump” in a desirable 
way. This effect is good for snare drums to increase the length of 
the transient by bringing the signal up after the initial spike.
THRESHOLD
RATIO
ATTACK
RELEASE
0 dB
1.9:1
1 ms
0.001 ms