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Vox® Bias Tremolo
Another way to achieve a tremolo effect is to alter the bias of the poweramp tubes. This Vox®
Bias Tremolo produces the volume and tone effects to create a tone heard on many famous Brit-
ish tunes.
Envelope / Special
DigiTech® Envelope Filter
An envelope filter is also called a “auto-wah” for its wah effect. The amount of wah is dependent
of the output volume of your guitar – he harder you play, the more wah you get. A definite B-
Movie soundtrack tone.
DigiTech Auto Yah™
If a wah, why not an effect that says “yah” when you use it? This is another take on the vowel
based effects but it is controlled the same way that the envelope filter is controlled.
DigiTech Sample & Hold
Using a changing filter, the Sample and Hold produces skipping tones
that can be heard in experimental and alternative music. Best used with distortion in front of the
effect.
DigiTech Step Filter
The Step Filter changes frequency in related patterns much like a sample and hold effect.
DigiTech Synth Talk™
Another DigiTech first, the Synth Talk™ makes your guitar sound like it’s talking due to vowel
like qualities.
DigiTech YaYa™
A descendent of a wah, the YaYa™ is a more complex circuit that produces a “ya” sound.
DOD® FX25 Envelope Filter
The DOD® FX25 is an classic analog envelope filter that can be found on many funk and alter-
native tracks. Used by both guitar and bass players. Try this one clean for a really funky sound.
Delays
Analog Delay
The analog delay produces delays that were derived from ”BBD” analog delay chips. The BBD
chips were the first ways to produce delay aside from the costly tape delays. The delay sound
was not HiFi but was reminiscent of the original signal and quickly became a cornerstone to
modern guitar sounds due to their warm qualities.
Boss® DM2 Analog Delay:
The DM2 is a classic and standard BBD analog delay that used 4,096 stages of delay. The frequen-
cy response and noise depended upon the delay time. The signal derogates with every repeat so
as the repeats are turned up, the signal becomes less and less recognizable and actually becomes
more of an “effect” than a delay.
Digital Delay
A digital delay can be called a perfect representation of your guitar’s signal. Desired for their bril-
liant qualities, digital delays have virtually no noise and a full frequency response.
Lo Fi Delay: The Lo Fi delay is an analog delay with a severely limited frequency response to
produce an even grungier delay effect.
Maestro EP-2 Tube Echoplex
The Echoplex is the standard to which all analog delays are judged. The Echoplex was the first
widely used tape delay and had a tone all of it’s own. The Echoplex can be heard on many rocka-
billy, surf, country and rock tracks.