OptionalattackTime in seconds to reach peak volume (default 0.01).
OptionaldecayTime in seconds to drop from peak to sustain level (default 0.1).
OptionalfrequencyBase frequency in Hz (default 440).
OptionalfrequencyFrequency slide adjustment in Hz (default 0).
OptionalgroupAudio group name (default "sfx").
OptionalholdTime in seconds to hold at sustain level before release (default 0).
OptionalpanStereo pan, -1 left to 1 right (default 0).
OptionalpitchPitch scaling factor (default 1).
OptionalreleaseTime in seconds to fade from sustain to 0 (default 0.1).
OptionalsustainVolume level during sustain phase, 0-1 (default 0). Also used as hold time for backward compatibility.
OptionaltagCustom tag for mass-stopping or identifying sounds.
OptionalvolumeVolume level, 0-1 (default 0.3).
OptionalwaveWaveform type (default "square").
Configuration options for synthesized sounds.