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Vintage B3 Wah controls in Logic Pro for iPad

The name wah effect comes from the distinctive sound the wah pedal produces. It has been a popular effect with electric guitarists since the days of Jimi Hendrix. The pedal controls the cutoff frequency of a bandpass, lowpass, or—less commonly—highpass filter. The wah pedal is also used extensively with the Hammond organ.

For the most dynamic and musical performance of the Wah effect, consider attaching an expression pedal to your MIDI master keyboard. Your master keyboard should transmit MIDI control change #11, which would normally be used to control Vintage B3 volume while playing.

Tap the Effects button at the top of the plug-in to view and adjust the Vintage B3 Wah parameters.

Figure. Vintage B3 Wah parameters.

Vintage B3 Wah parameters

  • Wah On/Off button: Turn on or bypass the Wah effect.

  • Wah Range knob and field: Determine the sensitivity of the Wah effect to incoming MIDI controller data.

  • Wah Mode pop-up menu: Choose one of several Wah effect types.

    • Classic Wah: This setting mimics the sound of a popular wah pedal with a slight peak characteristic.

    • Retro Wah: This setting mimics the sound of a popular vintage wah pedal.

    • Modern Wah: This setting mimics the sound of a distortion wah pedal with a constant Q(uality) Factor setting. The Q determines the resonant characteristics. Low Q values affect a wider frequency range, resulting in softer resonances. High Q values affect a narrower frequency range, resulting in more pronounced emphasis.

    • Opto Wah 1: This setting mimics the sound of a distortion wah pedal with a constant Q(uality) Factor setting.

    • Opto Wah 2: This setting mimics the sound of a distortion wah pedal with a constant Q(uality) Factor setting.

    • Resonant LP: In this mode, the Wah works as a resonance-capable lowpass filter. At the minimum pedal position, only low frequencies can pass.

    • Resonant HP: In this mode, the Wah works as a resonance-capable highpass filter. At the maximum pedal position, only high frequencies can pass.

    • Peak: In this mode, the Wah works as a peak (bell) filter. Frequencies close to the cutoff frequency are emphasized.

  • Bite knob and field: Boost the levels of signals surrounding the cutoff frequency. Bite is effectively a filter resonance parameter, where high values make the Wah effect sound more aggressive.

  • Wah Controller pop-up menu: Assign a MIDI controller to the Wah effect.

  • Wah Pedal slider and field: Control the pedal position of the Wah effect. When a MIDI controller is used, the slider and field reflect the current incoming MIDI CC value.

Use an expression pedal to control the Wah effect

  1. In the Logic Pro Vintage B3 Global parameters, set the Expression knob to a value of 0.

  2. Choose controller 11 from the Wah Controller pop-up menu in the Wah parameters.

    This allows control of Wah cutoff frequency with the expression pedal and requires no further setup of your master keyboard. If you overlook step 1, the expression pedal is used to control both Vintage B3 main volume and the Wah effect.

    Note: Consult the user manual for your keyboard to learn more about use of an expression pedal.

  3. Adjust the Wah Range knob to set the sensitivity of the Wah to incoming data from the expression pedal controller.

Learn a MIDI controller to control the Wah effect

  1. In the Logic Pro Vintage B3 Wah parameters, choose Learn MIDI from the Wah Controller pop-up menu.

    When Learn mode is active, the parameter is assigned to the first appropriate incoming MIDI data message.

  2. Move the MIDI controller on your MIDI device.

    Learn mode has a 20-second timeout facility: If Vintage B3 does not receive a MIDI message within 20 seconds, the parameter reverts to its original MIDI controller assignment.

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