Solved: Attention T510 owners: Audio / sound volume goes up and down

Hi all,
I am a new owner of a T510, and have discovered the audio goes up and down when listening to music through the speakers, running on battery. I would like to get in contact with other T510 owners, who can test if their unit has the same problem - try this:
1. Check all the settings in the SmartAudio control panel (using the newest driver) - making sure no EQ is set, nor VOIP settings or anything like that.
2. Check that no plugin was loaded in the sound control options (I am using Windows 7, 32 bit).
Now try and play this youtube song, and listen to the volume at around 40 seconds when the lead singer begins - does your audio volume go up and then down again when he stops? If you listen to the complete song, it goes up and down some more times.
Link:
http://www.youtube.com/watch?v=8Wz09yHXheU
/Kenneth
Edit #1:
I can unfortunately now add, that the problem is also there when using the AC adapter. It is so **bleep** annoying the volume fluctuates, and it is VERY easy to hear on the above link. Hoping to hear from other T510 users what their findings is. For information I can tell I am using the power plan called "Maximum Performance", in the power manager from Lenovo. The T510 model is a 4349-4JG.
/Kenneth
Edit #2:
I have now had time to test it some more, using another HDD (didnt want to reinstall windows on my SSD, hehe) - and can hereby say that it seems to be a bug in the audio driver / SmartAudio control panel. Clean Windows 7, 32 bit, has the problems - but when you disable the VOIP function in the Smart Audio control panel, the problem disappears (actually it was just the VOIP function that was active before). If you then try to enable the VOIP function again, the "problem" does not come back (hence the bug comes into action now). After this test, I put my SSD back into the laptop, and tried to mess with the VOIP functions (again, had already tried to mess with it), and it did not do anything (hence the bug is active now). Therefore I reinstalled the audio driver - tried to check if the problem was there, it was. Then I did the same procedure as on the other HDD, tried to disable the VOIP (before I installed anything else and such!), and the problem is now gone. And the result now is that when I try and enable the VOIP function again, the problem does not come back (hence the bug is now active) = me happy
In short terms:
The bug can either have the VOIP enabled and you can not disable it, or it can be the other way around - it cant be enabled. To "turn" the bug around, reinstall the audio driver :-)
/Kenneth

Hi,
Ive been having this problem with my Compaq CQ60-615DX for almost a year now. When im listening to music I can hear the audio going up and down through it. One sec itll be loud and the next its like the audio being turned down (but the volume bar does not move). I also have SmartAudio with the Conexant High Definition. So, I see that you have figured it out. Ive tried to understand what you said but im not very literate with computers. Could you explain how to stop it step by step? I would appreciate it. Thanks.

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Solved: Attention T510 owners: Audio / sound volume goes up and down

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