Electro Harmonix White Finger

Electro Harmonix White Finger yields transparent, long sustain that preserves attack. Two optocouplers (LED and lamp) offer distinctly different readings and uniquely varied compressions. The White Finger features multiple FETs instead of vacuum tubes, making it the affordable alternative.

The White Finger is a fixed threshold compressor, meaning the threshold remains constant while you have the ability to change the amount of signal that goes to the compressor circuitry. The signal level sent to the compressor is controlled by both the Pre-Gain and Compress knobs.

Some gain is needed to adjust the output level so that it matches the original level, and this is accomplished with an FET fixed gain pre-amp circuit. In general, compressors are used to sustain melody lines, minimize changes in signal level, or add a forward percussive effect to instruments or drums.

Electro Harmonix White Finger demo video