Equalizer

equalizer {
  // Whether or not the equalizer control is shown
  enabled = 1

  // Key of the preset that should be selected by default
  default = 3-band

  // Presets that are available to the user as dropdown
  presets {
    // "band-iso" defines an ISO graphic/band equalizer. Starting at 1000 Hz,
    // bands are added by stepping up and down by the specified number of octaves
    3-band {
      // Used translation key: control.sound_tools.equalizer.preset.group.graphic
      group = graphic
      mode = band-iso
      label = 3-Band
      // One decade = log2(10) octaves
      octaveStep = 3.32
    }

    // It is also possible to specify bands manually via "mode = band".
    // The following preset is (virtually) equivalent to the previous.
    3-band-manual {
      group = graphic
      mode = band
      label = 3-Band
      bands {
        0 {
          frequency = 100
          octaves = 3.32
          gain = 0
        }

        1 {
          frequency = 1000
          octaves = 3.32
          gain = 0
        }

        2 {
          frequency = 10000
          octaves = 3.32
          gain = 0
        }
      }
    }

    // In "mode = riaa", the time constants of a RIAA-style EQ can be specified.
    // Parameters that are not needed may be omitted (in particular, deepBaseRolloff).
    riaa-iec {
      group = riaa
      mode = riaa
      label = Enhanced RIAA / IEC
      params {
        trebleCut = 75
        baseBoost = 318
        baseBoostRolloff = 3180
        deepBaseRolloff = 7950
      }
    }
  }
}