Axe-Fx III

Blocks Guide Description

Although the wah effect can be said to mimic the sound of a human voice, it obviously falls a little short in this regard. The talk-box, a system which plays guitar sounds through a tube into a real human mouth, comes far closer to the sound of actual speech, but is a bit unwieldy, requiring a special speaker, mouth tube, and microphone. The Formant filter makes “talk-box” and other vocal effects possible without such a complex apparatus.

A formant is a prominent resonant peak. The human vocal tract is capable of producing different formants which we recognize as different vowel sounds. Filters can be used to reproduce these. For example, the vowel sound “eee” can be reproduced with a bank of narrow bandpass filters with various frequencies and amplitudes.

The Formant block can even blend dynamically between up to three different vowel sounds, called the Start, Mid, and End vowels. It usually sounds best when placed after distortion, although there are no hard and fast rules. The block is stereo in/stereo out and processes left and right channels independently.

List of Types

Be sure to check out the Axe-Fx Wiki for more details

Vowels Table

AAA as in Bat
EEE as in Bait
III as in Beet
OHH as in Boat
OOO as in Boot
EHH as in Bet
AHH as in Bot
AWW as in Bought
UHH as in But
ERR as in Bert

Axe-Fx III Formant Block Articles

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FM3 Formant Block Articles

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Axe-Fx II

Owner’s Manual Description

Although the wah effect was originally intended to mimic the sound of the human voice, it obviously falls a little short in this regard. The talk-box, a system which plays guitar sounds through a tube into a real human mouth, comes far closer to the sound of actual speech, but is considerably more unwieldy than a wah pedal. The Axe- Fx II Formant Filter makes “talk-box” effects possible without such a fussy apparatus.

A formant filter is an extension of the wah principle but operates with a far more vocal quality. Formants represent particular resonances of instruments, or in this case, of the human vocal tract. The human vocal tract generates a handful of formants to produce the vowel sounds we recognize. For example, the vowel sound “eee” can be reproduced with a bank of narrow bandpass filters with various frequencies and amplitudes.

The Axe-Fx II Formant Filter can be set statically or blend dynamically between START, MID, and END vowels. The CONTROL knob sweeps across this range, gradually changing from one vowel to the next between positions. For example, we can program the Formant Filter to go “III – AAA – OOO” for a “yoww” sound as a pedal is moved.

The Formant Filter usually sounds best when placed after distortion, although there are no hard and fast rules.

List of Types

Be sure to check out the Axe-Fx Wiki for more details

Vowels Table

AAA as in Bat
EEE as in Bait
III as in Beet
OHH as in Boat
OOO as in Boot
EHH as in Bet
AHH as in Bot
AWW as in Bought
UHH as in But
ERR as in Bert

Axe-Fx II Formant Block Articles

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AX8 Formant Block Articles

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FX8 Formant Block Articles

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