No Sound on Firefox or Chrome, Kubuntu 16.04

Amarok works fine, system sounds, local videos... but I get no sound in Firefox or Chrome on Youtube. I even tried installing flash plugin for Firefox instead of HTML5, STILL no sound.

I really have no idea what to do next. Googling hasn't come up with anything recent in this regard... (all versions from at least 2 years ago).

Has this happened to anyone else and do you know the solution? Or specifically something I can look at in my configuration that might clue me in?

Thank you.

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Firefox v47.0

Chrome v51.0.2704.106

Netflix, twitch and all others will not run in browser either. It seems like only browser-related apps will not have sound.

I installed the restricted extras (codecs).

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I have also tried installing freshplayerplugin, to no avail.

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Another update... I installed minitube and that works with youtube videos. On the DOWNSIDE, I installed wine/playonlinux and installed a game (starstable online) and there is no sound in game.

This is frustrating. I am sure there is some common denominator but I don't know what it is.

Driver information (thanks for the link): http://www.alsa-project.org/db/?f=f49aa014a5845d49a61aa5225fbf42f1c3c44408

Solution 1:

Thanks to Karsus I was able to track down the information I needed!!! When you install pavucontrol:

apt install pavucontrol

then you can pinpoint applications and see/control what sound output devices they think they should be using.

I had to manually set my browsers to use my headset for output. Sweet! Thank you Karsus.