Bug 104501

Summary:	Pulseaudio delays sound compared to activity on screen when using sound via HDMI
Product:	PulseAudio	Reporter:	Freek de Kruijf <freek>
Component:	alsa	Assignee:	pulseaudio-bugs
Status:	RESOLVED MOVED	QA Contact:	pulseaudio-bugs
Severity:	normal
Priority:	medium	CC:	lennart
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Freek de Kruijf 2018-01-05 14:13:46 UTC

I use a HDMI connection to my monitor with speakers. When playing a score in Musescore the sound is delayed by about 1 second compared to the the activity on the screen. The note in the score which is played is highlighted.
When changing the sound device in the tab "I/O" in Musescore from PulseAudio to ALSA audio, sound and picture are in sync. This suggests that pulseaudio is delaying the sound. "I/O" is reached by selecting Edit->Preferences...
I noticed earlier also this type of delay when playing a video in Firefox, however currently this is no longer the case. It was most apparent when a person is speaking in the video.
Previously I did not use HDMI to produce sound, but an old fashioned sound device, which AFAIR also went through PulseAudio, but I did not see/hear this delay.

Comment 1 GitLab Migration User 2018-07-30 09:37:50 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/61.

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