0004233: Stopping playback directly from fast-forward/rewind can leave audio muted (1 Viewer)


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March 26, 2007
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During fast-forward/rewind audio volume is reduced to a very low level (-50dB) using the IBasicAudio 'put_Volume' interface method (which should change the volume in the audio renderer) see - <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/dd389532%28v=vs.85%29.aspx">http://msdn.microsoft.com/en-us/library/windows/desktop/dd389532%28v=vs.85%29.aspx</a> [<a href="http://msdn.microsoft.com/en-us/library/windows/desktop/dd389532%28v=vs.85%29.aspx" target="_blank">^</a>] . When playback rate is restored to 1.0, the volume is reset to normal.<br /> <br /> If playback is stopped directly from fast-forward/rewind state the volume isn't restored - this is effectively a bug.<br /> <br /> I can't reproduce the problem, but it may be system/audio driver specific - the user (megahorst) who reported this also sees the volume OSD appear when starting fast-forward, so possibly (for some reason) 'put_Volume' is changing the mixer volume instead of the audio renderer volume (maybe because the audio renderer doesn't support it).

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