Maybe it doesn't like the multi-channel...?

So here it is in stereo.

It all started several days ago, when I uploaded a post of this fine scene and found that the audio was rendered as an awful buzzing noise when viewed on my venerable old tablet with a Chrome-ish browser.

I tried again yesterday and got what I thought was just silence, but it turned out that was just my venerable old tablet playing silly buggers :-(((

What is *was* was a slightly different buzzing, one that the buzzing where the music was supposed to be, but not the voices, and that's what made me twig.

So I down-mixed the 6 channel audio to 2 and that appears to be the trick.

Good to know.