[web-audio-api] Specify channel count for each node (#204)

> Originally reported on W3C Bugzilla [ISSUE-21544](https://www.w3.org/Bugs/Public/show_bug.cgi?id=21544) Tue, 02 Apr 2013 16:12:26 GMT
> Reported by Olivier Thereaux
> Assigned to 

Per discussion at Audio WG f2f 2013-03-26

Spec channel count for each node. Split out examples that represent defaults and put them in the node defintion

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Reply to this email directly or view it on GitHub:
https://github.com/WebAudio/web-audio-api/issues/204