Audio-Specific Float Slider Variables

PF_Param_FLOAT_SLIDERs contain several parameters not found in other sliders; flags, phase, and curve tolerance.

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Flags

The only flag available is PF_FSliderFlag_WANT_PHASE.

This registers the effect to receive updated phase information from After Effects during audio rendering.

To understand what this flag does, turn it off and check your output.

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Phase

This is where the requested phase value is stored.

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Curve Tolerance

Curve tolerance is used by After Effects to subdivide the audio effects' time-variant parameters. Set this to zero for default behavior (or for non-audio FLOAT_SLIDER parameters).

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What's Zero, Really?

When amplitude is zero, After Effects is at -192db.