[Webkit-unassigned] [Bug 102439] New: Audio graph nodes stuck in "scheduled" state

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=102439

           Summary: Audio graph nodes stuck in "scheduled" state
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://jsfiddle.net/pUBLm/12/
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Audio
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ray at bellis.me.uk
                CC: crogers at google.com


In the linked code, an Oscillator used as a source in a side chain used to control a filter's cutoff frequency remains stuck in the "scheduled" state.

The code works correctly in Chrome 25, but doesn't work in Chrome 23 or Safari 6.0.2.

This second oscillator (running as an LFO in this demo) is connected to a GainNode so that the amplitude of the change to the filter cutoff can be controlled.  I've verified that the problem persists if I remove that GainNode, although at that point the +/- 1 output from the LFO is insufficient to make the cutoff modulation audible.

If the LFO is also connected to the primary oscillator's frequency AudioParam then it correctly starts up.

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