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The basic amp settings and control knobs on the Mustang I/II and Mustang III/IV/V share many similarities but vary slightly.  The I/II lack "Middle" and "Reverb" control knobs (these can be control through Extra Hardware Parameter Controls for Mustang I/II), and have three preset knobs.  The III/IV/V have a "Middle" and "Reverb" control knobs, and a large "Push" knob- called the Data Wheel- for controlling a wider array of amp features via the III/IV/V's LCD screen.  

Below is a list of the both types of amps' control knobs and a basic explanation:

  • Gain
    • Simulates power to pre-amp
    • Changes volume and distortion
    • Emphasizes guitar's harmonics more than the Volume knob
  • Volume
    • Changes volume for Mustang's settings; used for leveling volume on pre-sets
    • Does NOT model Master Volume (Power Amp) of simulated amp
  • Treble
    • Typical high-frequency band pass filter
    • 0 = minimum treble (most filtering of high frequencies passing through) 
    • 10 = maximum treble (least filtering of high frequencies passing through)
  • Middle (III/IV/V only)
    • Typical middle-frequency band pass filter
    • 0 = minimum middle frequencies (most filtering of middle frequencies passing through) 
    • 10 = maximum middle frequencies (least filtering of middle frequencies passing through)
  • Bass
    • Typical low-frequency band pass filter
    • 0 = minimum bass (most filtering of low frequencies passing through) 
    • 10 = maximum bass (least filtering of low frequencies passing through)
  • Reverb (III/IV/V only)
    • Controls amount reverb
      • 0 = minimum reverb
      • 10 = maximum reverb
    • When a reverb setting is pre-set, amp will use selected reverb option
    • When no reverb is pre-set, III/IV/V utilizes a pre-set, default reverb option
  • Master
    • Controls Mustang amp's solid-state power amp to speakers
    • Changes total volume of sound output of the Mustang amp
    • Does NOT model Master Volume (Power Amp) of simulated amp
    • Affects all speaker volume, including the AUX Input signal
  • Presets (I/II only)
  • MOD (I/II only)
    • Modulation
  • DLY/RVB (I/II only)
    • Delay / Reverb
  • Push / Data Wheel (III/IV/V only)
    • ​Used for dialing though and selecting (push) from an array of the amp's features via the LCD screen
    • Labeled on the amp as "Push", it's also called the Data Wheel.

Fender FUSE software, or the Remuda Android App , may be used for full amp control and editing.