Compressor Mode; Limiter Mode - Electro-Harmonix PLATFORM Quick Start Manual

COMPRESSOR/LIMITER CONTROLS & INDICATORS
SUSTAIN Knob

Compressor Mode:

Adjusts compression ratio. As you turn the SUSTAIN
ratio
knob clockwise, the compression ratio increases. This determines how much
Threshold
compression is applied to a signal once it crosses the threshold. is the
volume level at which the compressor begins working on the signal. In
compressor mode, the Platform's threshold level is fixed at a constant -35dB.
In practical terms, compression ratio determines how much the compressor
squashes the signal level and thus how much it levels out dynamics. The higher
the ratio, the more it reduces the peaks and valleys in your signal level to yield a
more consistent output volume.
RATIO DIAGRAM

Limiter Mode:

The SUSTAIN knob adjusts threshold level. As you turn the
SUSTAIN knob clockwise, the threshold level decreases and forces the limiter to
act sooner on your signal. The compression ratio is constant and practically
infinite in Limiter mode.
ATTACK Knob
The ATTACK knob sets the amount of time delay before the compressor/limiter
is activated once the input signal level reaches or exceeds the threshold setting.
Turn the ATTACK knob clockwise to increase the attack time from fast to slow.
Slow ATTACK settings emphasize the initial attack and add greater pop to your
notes (this is great for guitarists who like to chicken pick or play funk). Fast
ATTACK settings produce a more even compression where the initial attack is
compressed along with the sustained portion of your notes.