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Re: Status of action items Re: W3C Audio WG Teleconference this week - 15 August 2013

From: Chris Wilson <cwilso@google.com>
Date: Thu, 15 Aug 2013 08:00:00 -0700
Message-ID: <CAJK2wqWiEs_ksEJa+Hf=M2Mr0yYS59QQMo5p99t7D7nV5twX+Q@mail.gmail.com>
To: Chris Lowis <chris.lowis@bbc.co.uk>
Cc: Olivier Thereaux <Olivier.Thereaux@bbc.co.uk>, Audio WG <public-audio@w3.org>
You should probably define it at the AudioParam level, but explicitly
define for each AudioParam whether it is on or off.  We have dezippering
turned on for all AudioParams, and we have had multiple bug reports of
portamento-like effects due to oscillator.frequency.value settings not
taking immediate effect - believe we have a bug on this somewhere, and I've
mentioned to Chris we need to be much less aggressive about de-zippering.
 De-zippering makes sense for gain, but I'm not convinced it does for all
params; and, of course, developers can always do it themselves (by calling
setTargetAtTime(now)).


On Thu, Aug 15, 2013 at 5:10 AM, Chris Lowis <chris.lowis@bbc.co.uk> wrote:

>
> Olivier Thereaux writes:
> > * ACTION-66: Look into what dezippering in webkit was based on (on Chris
> Lowis)
> > https://www.w3.org/2011/audio/track/actions/66
>
> I've started on this - I think I have a good understanding on what the
> algorithm is based on, and it looks straight-forward enough to spec. I'm
> trying to work out where the specification belongs, because it appears
> that "dezippering" should be applied at the AudioParam level rather than
> just on the GainNode.
>
> I'll write up more in the bugzilla ticket shortly.
>
> Cheers,
>
> Chris
>
>
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Received on Thursday, 15 August 2013 15:00:30 UTC

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