Audio dropping out of sync in HTML5 course
Jan 19, 2018
I built a regular HTML5 course in SL360, and published for LMS.
Each slide has at least one mp3 file for VO which the onscreen visuals are then synchronised to. Some slides have multiple VO files one after the other on the timeline.
Unfortunately when viewing the course, sometimes the audio will drop out of synchronisation and the last 1 or 2 seconds of an audio file are cut.
For example, if the VO was supposed to say "Point 4, wash your hands." then you might hear "Point 4, wash yo..." and then the course moves on to the next slide.
The problem seems to vary in severity from browser to browser.
It also happens when just running the course from a web server and not an LMS.
Doing some research and reading, it seems its a known HTML5 issue, especially when the browser window loses focus (ie. user switches to another tab/application)
I know Articulate just patched SL360 in December, and one of the patch notes mentions this issue, but the patch doesnt seem to have helped for me.
Has anyone else experienced this issue, and is there anything we can do to mitigate it?