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Re: Aiding early implementations of the web audio API

From: Robert O'Callahan <robert@ocallahan.org>
Date: Wed, 23 May 2012 10:28:36 +1200
Message-ID: <CAOp6jLZV=5WSJ1QgnPHuKhmaNoyj=oe31ex=WtvUDbCmpHygXQ@mail.gmail.com>
To: Colin Clark <colinbdclark@gmail.com>
Cc: Chris Rogers <crogers@google.com>, Jussi Kalliokoski <jussi.kalliokoski@gmail.com>, Chris Wilson <cwilso@google.com>, Marcus Geelnard <mage@opera.com>, public-audio@w3.org, Alistair MacDonald <al@signedon.com>
On Wed, May 23, 2012 at 9:22 AM, Colin Clark <colinbdclark@gmail.com> wrote:

> I think that's a really good start, yes! The key, as Jussi has just
> mentioned, is to think through how we might expose the behaviour of the
> built-in AudioNodes in a manner that authors of JavaScriptAudioNodes can
> harness. If a native FFT can blow away one implemented in JavaScript (such
> as the one implemented by Ofm Labs), perhaps it should be exposed in a way
> that is not dependent on use of the RealtimeAnalyzerNode?

I think exposing an FFT library directly to JS (operating on JS typed
arrays) is a no-brainer. It should be fairly easy to spec and implement.

Output signals from AudioNodes can be piped into a Javascript processing
node, giving you some reuse there.

I'm still coming up to speed on the spec, so I'll continue to mull it over
> with this in mind. Another thing, off the top of my head, that stands out
> is the noteOn/noteGrainOn/noteOff methods that some AudioNodes implement.
> It wasn't clear to me from reading the spec if JavaScriptAudioNodes can
> also implement this behaviour?

No. Having the ability to schedule the turning on and off of arbitrary
streams/nodes is one of the features MediaStreams Processing has that Web
Audio doesn't.

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Received on Tuesday, 22 May 2012 22:29:24 UTC

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