[whatwg] Timing API proposal for measuring intervals

[Robert O'Callahan]

On Tue, Jul 12, 2011 at 7:23 AM, Chris Rogers <crogers at google.com> wrote:

> In the CoreAudio case, the AudioTimeStamp contains *both* the host-time
> (system clock) and the sample time (based on audio hardware).  This creates
> a relationship between the two clocks.  As an example of how these two
> clocks can be used together for synchronization, audio applications use the
> high-resolution timestamp of incoming MIDI messages to schedule audio
> synthesis to happen with very low jitter by doing sample-accurate scheduling
> when rendering the audio stream.
>
> Because of clock-drift, the system clock that James is proposing cannot
> *directly* be the same clock as what I'm proposing in the Web Audio API
> AudioContext .currentTime attribute.  But there are ways to translate
> between the two in very useful ways.
>

Thanks Chris, I thought you'd know the answer :-).

Suppose we wanted to sync animation (either scripted animation or CSS
animation) to audio. We'd want them to use the audio clock, right?

Rob
-- 
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