Garbled sound, gets good if cycled through hdmi - video - component-hdmi

Moved to the XfinityTV and Equipment forum.

the sad clown wrote:You are using catalyst, right?  Have you tried switching to radeon?
Sory for taking so long to reply. I am using the catalyst driver yes, but since I have a Radeon HD 7870, this page seems to say that the radeon driver isn't right for me yet, which is why I haven't tried it out: http://www.x.org/wiki/RadeonFeature (my GPU is S. Islands).
Other than that, after updating, I've seen a driver update, the sound was clear again, but went through the same pattern of progressively degrading, and after one or two hours, it's back to where it was... So it seems to me that this is quite definitely the driver, but I have no idea what I'm doing wrong. And the sound seems to remain clear on windows, so it's definetely an Arch issue...

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