OptionaldurationHow long a note rings unless told otherwise, in milliseconds (default: 900)
OptionalgainLoudness, 0–1 (default: 0.5)
OptionalonThe audio could not be started
OptionalonThe browser is holding the sound back until the page is tapped or clicked — as iOS does with sound not started from a tap. Nothing was played, and no note was announced: play again from a tap
OptionalsamplesRecorded samples to play instead of the built-in voice. The SDK ships none: the app chooses the host, and that set's licence applies. A note the host has no file for, or whose file cannot be fetched, is played with the built-in voice instead
OptionalsampleHow long a note may wait for its sample before the built-in voice plays it instead, in milliseconds (default: 1200)
How a note is sounded.