Audio Static On Four Channels
Posted 31 March 2012 - 03:11 PM
We live on the coast side of Montville, about 5km from the Dulong transmitter, and today for the first time after being here two years+, i decided to watch the AFL on 7mate. I can definitely WATCH it, the picture is perfect, but the audio is just continual low frequency static, with no discernable commentary - its flooded with noise. My partner sees this as a feature
I checked the rest of the digital channels and found a similar problems on three others:
24 - 767MHZ
50 - 662 MHZ
63 - 788 MHZ
80 - 809 MHZ
The wierd thing is that other channels transmitting on similar frequencies are clear as a bell, ie all the ABC channels, the other channel 7s etc.
I suspected it may be RF being generated by our solar inverter, which is about three meters away from the PVR, on the outside wall. I switched that off and rechecked - it made no difference.
Any ideas? or has anybody had similar problems?
99% of my viewing is in the evenings, so i cannot say how long this interference has been a problem.
Posted 31 March 2012 - 03:21 PM
Posted 31 March 2012 - 06:28 PM
I did give the unit a soft restart earlier - which made no difference. Last night i watched the Hawks crush Collingwood on 63 with no audio problems evident. After the game finished i loaded up an MS service pack on the machine and a few windows updates. Normally i would expect decoding issues to be a problem across all channels if it had anything to do with the SP, anyhow i will try the PWR Reset and reload the audio drivers if its still a problem.
Posted 31 March 2012 - 08:40 PM
Edited by MrCurlyWhirly, 31 March 2012 - 08:49 PM.
Posted 31 March 2012 - 11:47 PM
It was never going to be anything to do with solar arrays or other interference as the picture is working for you and the other services on the same multiplexes work for you as well.
Posted 01 April 2012 - 02:41 PM
Posted 01 April 2012 - 03:16 PM
I am not entirely sure how to resolve this, all the audio drivers have been updated, will start by rolling back from SP2 in case that has touched something it should not have that is somehow effecting the decoding.
Any further suggestions on how to resolve this would be appreciated. When i run the dolby test in the Realtek sound utility i am getting the same static sound, are there any other diagnostic aids available for sound chip level troubleshooting?
Posted 01 April 2012 - 03:26 PM
Posted 01 April 2012 - 04:36 PM
According to the transmission info there was dolby digital being picked up on some of the channels with good audio, are you saying this audio is stripped from the MPEG stream, while the other dolby digital on those four static channels is transmitted differently requiring a different level of decoding?
MPEG doesn't carry Dolby Digital, it can how ever be surround encoded which can then be decoded to multiple channels with Dolby Prologic II, DTS Neo:6, etc.
Posted 01 April 2012 - 09:20 PM