Chapter 4 The Effects Explained

Bow:

Waveform shaping outputs a soft sound with no attack.

Octave Shift

(with Square and Saw)

This outputs sound one octave below the original sound.

PWM Rate (Pulse Width Modulation Rate)

(with Square)

Modulation is applied to the waveform (Square wave only) to create a broader, fatter sound. Higher values increase the rate of the modulation.

PWM Depth (Pulse Width Modulation Depth)

(with Square)

This adjusts the PWM depth. When set to “0,” no PWM effect is obtained.

Noise Level

This adjusts the noise added to the sound from the sound generator. Adding noise gives the synth bass a special type of ambience.

Sens

This adjusts the input sensitivity.

In Internal Sound Generator method, although the response of the internal sound generator improves as the sensitivity value is increased, errors occur more often. Try to set the value as high as possible without causing errors.

In Waveform Shaping method, this lets you adjust the sensitivity of the shifting filter in response to the strings as they are played when the attack trigger is turned off. Raising this value allows the filter to respond with greater sensitivity, even when the strings are played softly.

Hold

(with Square and Saw)

This sustains the sound output by the sound generator. You can use a control pedal or other such control to hold synth bass sounds at the same pitch at which they are played.

*When using the Hold function, be aware of the importance of the order in which the effects are connected. When the noise suppressor is connected after FX-2, held synth sounds are not output when the bass input sound is stopped. In such cases, be sure to place FX-2 ahead of the noise suppressor (p. 22).

Attack Trig (Attack Trigger)

(with Brass and Bow)

This setting determines whether the filter acts according to the envelope of the input sound or mechanically by detecting the vibration of the strings as they are played. When set to OFF, the filter operates in response to the volume of the input bass sound, like a touch wah; when set to ON, the filter operates more mechanically, as with the Internal Sound Generator method, by detecting the degree of attack.

*When using the synth bass with this parameter on, errors may occur if the unit is unable to detect the attack properly. Completely mute the other strings, and play single notes.

Resonance

This adjusts the filter resonance (the amount of feedback). Increasing the value emphasizes the effect, creating a more unusual sound.

Cutoff Freq (Cutoff frequency)

This adjusts the frequency at which the harmonic components are cut off (the cutoff frequency). This parameter determines the tone at the point that the filter movement finally stops.

Depth

This adjusts how much the filter shifts. When a positive value is set, playing a string causes the filter to go upwards, starting from the conditions determined with the cutoff frequency. Conversely, the movement is downward when the value is negative. The change becomes more dramatic as the numerical value is increased.

Decay

(with Square and Saw, or Attack Trig On)

This sets the rate for the filter’s movement. The filter moves more slowly as the value is increased.

Synth Level

This determines the volume of the synthesizer sound.

Direct Level

Adjusts the volume of the direct sound.

Bend

(with Square, Saw)

You can use the expression pedal to control the frequency of sounds from the internal sound generator.

Use this by setting the parameter to “On” and assigning the expression pedal or similar controller to Pdl Position.

Pitch Min

(with Square, Saw)

Sets the pitch produced when the expression pedal is released.

Pitch Max

(with Square, Saw)

Sets the pitch produced when the expression pedal is fully depressed.

Pdl Position (pedal position)

(with Square, Saw)

Adjusts the Pedal Bend pedal position.

Chapter 4

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Boss Audio Systems GT-6B Octave Shift, PWM Rate Pulse Width Modulation Rate, PWM Depth Pulse Width Modulation Depth, Hold