[Webkit-unassigned] [Bug 151589] New: [WebAudio] Cannot change volume of media element source

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151589

            Bug ID: 151589
           Summary: [WebAudio] Cannot change volume of media element
                    source
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: iOS
                OS: iOS 9.0
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Audio
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ashley at scirra.com

Demo URL: https://www.scirra.com/labs/bugs/musicvol/

Tested on an iPad Air 2 running iOS 9.1. Press "Play music" then when you can hear the music, press either of the "set volume" buttons. Neither of them change the volume. The demo creates a new Audio() and connects it to a Web Audio context via createMediaElementSource() which is itself connected to a gain node. The buttons change the gain node volume and the Audio object's volume. Neither have any effect on the playback volume. Both options work in Chrome, Firefox and Edge on Windows 10.

This prevents Construct 2 content being able to change the volume of music in iOS.

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