1. Visit https://dl.dropboxusercontent.com/u/40949268/Bugs/long_beep.html 2. Press Start audio. Result: During the audio playback, cracks/snaps are audible while the audio clip plays out. Tested on FF25.0 and Nightly 2013-11-10. Expected: The page should play back a glitch-free 20 second sine wave.

Hi Karl & Paul -- Can you look into this report? Jukka also reported Bug 937057 and Bug 937061 which are related to this bug.

This might be a dupe of bug 848954.

I'm not reproducing here, on Linux, but yes, without bug 848954 random issues like this are likely.

I do get this occasionally, usually more likely soon after page load, and when it happens BufferedAudioStream::DataCallback() reports an underrun. http://hg.mozilla.org/mozilla-central/annotate/6b6bb661fd3d/content/media/AudioStream.cpp#l991

We should really land some debugging printfs in that code which tells you when this happens. I've had to verify this bug at least 50 times thus far... :/

NSPR_LOG_MODULES=AudioStream:3 if it is a debug build.