Pulseaudio & tsched=0,random whitenoise since change to HDMI audio out

Hi all
I had a fully working mythtv box with pulseaudio. Some time ago, I remember I had to add tsched=0 to /etc/pulse/default.pa like in the following line
load-module module-udev-detect tsched=0
because I had random white noise when skipping sections in music/video. I used analog out of my Creative Labs SB Live! at the time. Now I have a Nvidia GT 520 with HDMI out, connected it and changed some settings in alsamixer, pavucontrol as well as mythtv in order to have audio out through hdmi to my TV and it worked.
But since then I have again those random white noise issues. I start watching a recording and when I skip for 30sek it might still play normal, but randomly and with very high probability like every third or second time I skip again there is no sound anymore, but a very strong noise blasting out of my TV speakers. It is nearly unbearable, so loud.
So basically it is the same thing I could earlier work around with the tsched=0 parameter, but after searching hours in google I could not find anything better/else than setting this parameter which I already have since very long time.
Does someone have an idea where to start searching for the culprit?
TIA

Ok, so I have had some time to devote to this. Since this was a a new install of Arch I decided to just reinstall again to wipe out anything that I might have added to cause further compication to the solution. I am sure I am missing something obvious as aplay shows the card:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 7: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 8: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 9: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
To restate, my system is:
MB - Gigabyte GA-X58A-UD3R (onboard audio is disabled)
Graphics card - GTX 470
LED HDTV - Vizio XVT473SV
My Alsa-info output is here:
www.alsa-project.org/db/?f=04cdccbef389c4663f9db42d4d4a754321bf3fc3
I have tried numerous howtos, tutorials and posts to attempt to solve this issue, but no luck. Here are a couple of them:
http://newyork.ubuntuforums.org/showthr … ?t=1565479
http://wiki.xbmc.org/index.php?title=HO … ,_or_GT240
A couple of things worth noting:
All four channels are Mmuted (MM) each time I boot within alsamixer. There are no sliders on the four channels. They are either muted or not.
I have the HDMI input in HDMI1 on the TV, but I can move it to another if needed.
Since I am really unsure what would be needed beyond the alsa-info output I will hold off throwing irrelivant system logs and output, Please let me know what information would be helpful and I will post it.
I would really like to get this solved, so anyone willing to give a shot at helping me solve it would be most appreciated.
TIA

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Concerns: Firefox 18.0.1 often freezes, at random times, since about 31 Jan 2013
I am using Mozilla Firefox 18.0.1, Windows Vista, PC, Desktop.
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A variety of issues can cause PPRO to crash:
a problem with the Preferences, or some other pref-related file in the Profile-<USERNAME> bin. >> DIDN'T CHANGE ANYTHING since 1½ years running previous PrPro versions on SAME PROJECT on SAME PC
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a problem with the project file (if you're loading a project...) Doesn't apply
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a problem on the licensing/authentication side. I'm signed up to full Adobe CC. Everything else works, Ps, Lr, Id ...
A log file might help identify the cause of the crash. Please right-click 'My Computer', select "Manage," look under 'Event Viewer->Windows Logs->Application' to see if there's an event there from Premiere Pro. If so, copy the contents of that log and paste them here.
>>>>>>>>>>>>>>
Faulting application name: Adobe Premiere Pro.exe, version: 8.2.0.65, time stamp: 0x5486db4a
Faulting module name: VideoFilterHost.dll, version: 8.2.0.65, time stamp: 0x5486bf85
Exception code: 0xc0000005
Fault offset: 0x000000000006d692
Faulting process id: 0x19d0
Faulting application start time: 0x01d022d29c3e2d43
Faulting application path: C:\Program Files\Adobe\Adobe Premiere Pro CC 2014\Adobe Premiere Pro.exe
Faulting module path: C:\Program Files\Adobe\Adobe Premiere Pro CC 2014\VideoFilterHost.dll
Report Id: 1097ced4-8ec8-11e4-aaaf-08606e6e6383
<<<<<<<<<<<<<<<
Thanks,
Rameez

Problem Solved! (with a small catch)
While searching crashing issues I came across this thread,"Premiere Pro random crashing since update to 2014.2"
Marc_Lec Answered (and I paraphrase here)"...I had the same problem and this is what I did. In 'Preferences Memory' I increased the memory reserved for other application to at least half the installed and changed the optimize render from 'performance' to 'memory."
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