Target Customizer

The Target Customizer lets visitors reshape a target curve to their own taste with a handful of filter sliders — tilt, bass, treble, ear gain — and one-click presets such as the Harman 2013, 2015 and 2018 tunings. Adjustments sit on top of the original target: the file on disk never changes, and the adjusted curve is carried in share links.

Customizable targets show a sliders icon in their selection-list row. For the walkthrough, see Targets and preferences.

Filter types

Each slider is one filter, defined by the operator with a type, a frequency and a Q:

Type	Shape	Typical use
TILT	Linear gain change across the whole spectrum	Overall warmth or brightness
LSQ	Low shelf below the corner frequency	Bass boost or cut
HSQ	High shelf above the corner frequency	Treble brightness
PK	Peaking filter centred on the frequency	Ear-gain region, a specific band

The default set is Tilt, Bass (LSQ, 105 Hz), Treble (HSQ, 2.5 kHz) and Ear (PK, 2.75 kHz).

What operators control

All of it is set under TARGET_CUSTOMIZER in config.js:

• Which targets are customizable. Only targets listed in CUSTOMIZABLE_TARGETS get the sliders, so reference targets can stay locked.
• The filters. FILTERS defines the sliders. Setting it replaces the default set rather than extending it.
• The presets. FILTER_PRESET maps preset names to slider values.
• Initial adjustments. INITIAL_TARGET_FILTERS applies slider values to a target as soon as it loads, so a deployment can ship its preferred variant of a target by default.