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The sound of a Flanger can range from subtle chorusing, to swooshing jet plane, to robotic drainpipe. The effect was intended to duplicate the sweeping comb-filter sound created when one of two tape decks playing synchronized material is shifted out of time by pressing a finger on the “flange” of the tape reel (hence the term). A great example of tape flanging can be heard in the bridge of the Doobie Brother's song "Listen to the Music." The flanger effect has evolved through countless variants, but almost all of them have a “feedback” control (sometimes called “regeneration” or “intensity”) which returns some of the output signal to the input and intensifies the characteristic sweep. A regenerative flanger is a real attention-getter.
Each Axe-Fx II preset can use two fully independent Flanger blocks.
Flanger X/Y Channel Switching
Each instance of the Flanger block stores two fully independent sets of parameters called X and Y. Selecting between these allows you to change all block settings—instantly—at the touch of a switch or button (excluding current Bypass State and any Modifier assignments).
Basic Parameters
TYPE — This control instantly sets other Flanger parameters for useful sound settings. Types include: DIGITAL MONO, DIGITAL STEREO, ANALOG MONO, ANALOG STEREO, THRU-ZERO, and STEREO JET.
TIME — Adjusts the nominal delay time of the delay line. This changes the character of the effect. Low values give a phaser-like sound whereas high values are more metallic. Adjust to taste.
RATE — Controls the frequency of the Low Frequency Oscillator, which varies delay time to create the sweep. Use low settings rate with high depths for slow-moving sounds. Increase the rate for vibrato effects. Set fully counterclockwise to sync the Flanger LFO to global LFO1. When RATE is shown in parenthesis, it is being set automatically by the TEMPO parameter (see below). Set the TEMPO to "NONE" for manual control.
DEPTH — Sets the maximum delay variation. Higher depths increase the amount of detuning. Usually, the rate and depth settings should be varied inversely, so an increase in rate warrants a decrease in depth. Unique sounds can also be obtained by ignoring this convention and using other combinations of rate and depth.
FDBK — Feedback sets the amount of wet signal fed back to the input. Extreme values give the flanger a more intense quality as it produces sharp resonances in the frequency response. With negative FEEDBACK values, the wet signals are out of phase with the dry, creating sounds with a different character than those created using positive feedback.
Note that extreme feedback at minimum flanger DRIVE settings will cause a siren-like ringing oscillation.
MIX — Sets the ratio of wet and dry (duplicated from the MIX page).
TEMPO — Locks the flanger rate in rhythmic relation to the global tempo. For example, if the tempo is set to “1/4” and the global tempo is 120 BPM, the rate will automatically be set to 2 Hz (BPM/60 = Hz). To ignore the global tempo set the tempo control to NONE.
Advanced Parameters
THROUGH ZERO — Setting this to ON adds a delay to the dry path equal to half the sweep depth. This can emulate true tape-deck flanging, where one of the two tapes is first ahead of, and then behind, the other.
PHASE REVERSE — Controls the phase of the wet output signal. Either or both channels can be inverted. Use to increase the effect of through zero flanging.
HIGH CUT — This filters the wet portion of the effect signal, gently rolling off treble at the set frequency with a slope of 6db. Set to lower values for a “darker” flanging sound.
LOW CUT — Adjusts the cutoff frequency of a high-pass filter in the flanger’s feedback loop, gently removing bass frequencies as the value is increased for a “thinner” flanging sound.
DRIVE — This control allows you to simulate the gentle distortion produced by overdriving an analog “bucket brigade” delay chip of the type used in many vintage flanger effects. Set to zero for “pristine clean.”
LFO PHASE — Adjusts the phase difference between the left and right LFO waveforms. For maximum stereo spread, set this to 180 degrees. For mono flanging, set this to zero.
LFO TYPE — Sets the “shape” of the modulation waveform.
LFO HICUT — Lowering this control filters the LFO waveform, rounding sharp turns in its shape. Certain waveform types (saw, square, random) otherwise have “discontinuities,” which can cause clicks or pops as their values jump from one extreme to another. Lowering the LFO HICUT frequency will mitigate this.
AUTO DEPTH — Scales DEPTH to create a consistent sound at any RATE. This control simplifies dialing in “musical” results, but for precise control or wild sounds you may wish to turn it OFF.
STEREO SPREAD — Controls stereo width by setting the pan position of the two delays from hard panned (100%) to dead center (0%).
Flanger Mix Parameters
The Flanger block also has a MIX page with LEVEL, BALANCE, and BYPASS MODE parameters.
http://wiki.fractalaudio.com/axefx2/index.php?title=Flanger_(block)#What_is_flanging
Each Axe-Fx II preset can use two fully independent Flanger blocks.
Flanger X/Y Channel Switching
Each instance of the Flanger block stores two fully independent sets of parameters called X and Y. Selecting between these allows you to change all block settings—instantly—at the touch of a switch or button (excluding current Bypass State and any Modifier assignments).
Basic Parameters
TYPE — This control instantly sets other Flanger parameters for useful sound settings. Types include: DIGITAL MONO, DIGITAL STEREO, ANALOG MONO, ANALOG STEREO, THRU-ZERO, and STEREO JET.
TIME — Adjusts the nominal delay time of the delay line. This changes the character of the effect. Low values give a phaser-like sound whereas high values are more metallic. Adjust to taste.
RATE — Controls the frequency of the Low Frequency Oscillator, which varies delay time to create the sweep. Use low settings rate with high depths for slow-moving sounds. Increase the rate for vibrato effects. Set fully counterclockwise to sync the Flanger LFO to global LFO1. When RATE is shown in parenthesis, it is being set automatically by the TEMPO parameter (see below). Set the TEMPO to "NONE" for manual control.
DEPTH — Sets the maximum delay variation. Higher depths increase the amount of detuning. Usually, the rate and depth settings should be varied inversely, so an increase in rate warrants a decrease in depth. Unique sounds can also be obtained by ignoring this convention and using other combinations of rate and depth.
FDBK — Feedback sets the amount of wet signal fed back to the input. Extreme values give the flanger a more intense quality as it produces sharp resonances in the frequency response. With negative FEEDBACK values, the wet signals are out of phase with the dry, creating sounds with a different character than those created using positive feedback.
Note that extreme feedback at minimum flanger DRIVE settings will cause a siren-like ringing oscillation.
MIX — Sets the ratio of wet and dry (duplicated from the MIX page).
TEMPO — Locks the flanger rate in rhythmic relation to the global tempo. For example, if the tempo is set to “1/4” and the global tempo is 120 BPM, the rate will automatically be set to 2 Hz (BPM/60 = Hz). To ignore the global tempo set the tempo control to NONE.
Advanced Parameters
THROUGH ZERO — Setting this to ON adds a delay to the dry path equal to half the sweep depth. This can emulate true tape-deck flanging, where one of the two tapes is first ahead of, and then behind, the other.
PHASE REVERSE — Controls the phase of the wet output signal. Either or both channels can be inverted. Use to increase the effect of through zero flanging.
HIGH CUT — This filters the wet portion of the effect signal, gently rolling off treble at the set frequency with a slope of 6db. Set to lower values for a “darker” flanging sound.
LOW CUT — Adjusts the cutoff frequency of a high-pass filter in the flanger’s feedback loop, gently removing bass frequencies as the value is increased for a “thinner” flanging sound.
DRIVE — This control allows you to simulate the gentle distortion produced by overdriving an analog “bucket brigade” delay chip of the type used in many vintage flanger effects. Set to zero for “pristine clean.”
LFO PHASE — Adjusts the phase difference between the left and right LFO waveforms. For maximum stereo spread, set this to 180 degrees. For mono flanging, set this to zero.
LFO TYPE — Sets the “shape” of the modulation waveform.
LFO HICUT — Lowering this control filters the LFO waveform, rounding sharp turns in its shape. Certain waveform types (saw, square, random) otherwise have “discontinuities,” which can cause clicks or pops as their values jump from one extreme to another. Lowering the LFO HICUT frequency will mitigate this.
AUTO DEPTH — Scales DEPTH to create a consistent sound at any RATE. This control simplifies dialing in “musical” results, but for precise control or wild sounds you may wish to turn it OFF.
STEREO SPREAD — Controls stereo width by setting the pan position of the two delays from hard panned (100%) to dead center (0%).
Flanger Mix Parameters
The Flanger block also has a MIX page with LEVEL, BALANCE, and BYPASS MODE parameters.
http://wiki.fractalaudio.com/axefx2/index.php?title=Flanger_(block)#What_is_flanging
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