No Sound Production

Question

Hello;
I am an experienced linux/unix user and I've never had this problem before, but I'm rather desperate because I can't find a solution, upon STW I came to realize that many people have this problem, but none have a solution applicable to my system:
Running Arch Linux with Enligtenment (e17) on an older (2005) Asus Laptop Intel core with Centrino. The webbrowser in question is Firefox 13.0 and I'm running a very recent version of Adobe Flash.
Upon trying to run multimedia, such as that found in Youtube or on online television network sites, I find that the video and everything runs fantastic, smooth, not choppy except when the buffering rate slows down, however absolutely no sound is produced by the machine, not through my in-laptop-speakers, or in my headphones. Other applications such as Gnome MPlayer and Adacious seem to be producing sound as normal. The problem may be that I'm running OSS instead of another sound, but I haven't seen any preferences on my enlightenment or Firefox which allow me to specify sound agent, so I don't believe that is the problem, as, like I said above, everything else is running great (note: along those lines I did have to set preferences to OSS, but that is done in my enlightenment settings now and I don't see any in Firefox which are to that effect, or to sound effect at all) This was a very long winded explanation of my situation and problem in hopes that it provides all the information necessary to offer me assistance.
Desperately trying to run sound;
KrGunders

Answer 1

Hi, I have an update.
Whilst testing out the Dropbox syncing side of things, I looked at my MacBook and the piece of audio I'm having trouble with and realised it's Apple audio, therefore not something I've imported myself. What prompted me, was that when I opened Logic on the MacBook I was asked to download additional content.
That was when it triggered the 'ahhhhhh, of course!’ moment.
So, I downloaded all available additional content onto the MacBook and then expected it to work. However, it still doesn’t play.
I can eliminate Dropbox syncing issues, as I copied the Logic project file from my home iMac onto the MacBook, and the sound still doesn’t come in - it’s simply not being picked up at all.
Heading to Logic Pro X > Download Additional Content shows that I’m fully up to date.
So the same file, on two different machines with full content updates on both copies, is still resulting in one piece of audio not playing back on the MacBook copy.