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    Interface TremoloOptions

    Construction-time configuration for a TremoloEffect, mirroring the tremolo AudioWorkletProcessor's AudioParam set (see import('./processors/tremolo').TremoloWorkletProcessor). All fields are optional; the worklet clamps to its documented ranges downstream. Field NAMES match the AudioParam names exactly (they flow straight through as parameterData).

    The effect is LFO-driven amplitude modulation (a VCA swung by an LFO) — the gain swings between (1 - depth) and 1, never inverting (a true tremolo, not ring modulation). Anchored to standard AM theory, the quadrature stereo LFO of Dattorro 1997 (p.776), and the LFO-driven-effect framing of Mitcheltree et al. (DAFx23). stereoPhase offsets the per-channel LFO (0 = mono, 90 = quadrature, 180 = hard auto-pan).

    interface TremoloOptions {
        depth?: number;
        rate?: number;
        shape?: number | "sine" | "square" | "triangle";
        stereoPhase?: number;
    }
    Index
    depth? rate? shape? stereoPhase?
    depth?: number

    Modulation depth (0 = bypass, 1 = full 0..1 swing). Default 0.5. Range 0..1.

    rate?: number

    LFO rate in Hz. Default 5. Range 0..20.

    shape?: number | "sine" | "square" | "triangle"

    LFO shape: 0 = sine, 1 = triangle, 2 = square. Default 0. Accepts either the integer index or the matching string alias ("sine" = 0, "triangle" = 1, "square" = 2), translated to the index in build().

    stereoPhase?: number

    Per-channel LFO phase offset in degrees (0 = mono, 90 = quadrature, 180 = auto-pan). Default 0. Range 0..180.

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