[Webkit-unassigned] [Bug 75767] New: EQUALPOWER panner incorrectly computes gain

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Jan 6 21:55:09 PST 2012


           Summary: EQUALPOWER panner incorrectly computes gain
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Audio
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rtoy at chromium.org
                CC: crogers at google.com
            Blocks: 75126

The formula to compute the left gain for the EQUALPOWER panner is incorrect.  When the azimuth is 0, the gain is 0.5.  It should be 1/sqrt(2).  It should be a cosine curve between -90 and 90 deg, with a gain of 1/sqrt(2) at an azimuth of 0.

This needs to be fixed before 75126 can be committed with its tests.  (That will also indirectly verify that the EQUALPOWER panner works in at least one case.)

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