outputLatency property
The outputLatency read-only property of
the AudioContext provides an estimation of the output latency
of the current audio context.
This is the time, in seconds, between the browser passing an audio buffer out of an audio graph over to the host system's audio subsystem to play, and the time at which the first sample in the buffer is actually processed by the audio output device.
It varies depending on the platform and the available hardware.
Implementation
double get outputLatency;