Pro Logic II - high frequency interference

docrob · 01-25-07, 04:51 AM

Hi,

I'm new to all this surround sound stuff so excuse my ignorance. Just got Onkyo TX-SR674E AVR and Monitor audio surround 5.1 (4 x radius 45 and radius 180 centre).

I've set it all up with automatic setup which callibrates everything. When i listen to Sky TV program or any stereo input (ie freeview) through Dolby PLII or Neo 6 the surround speakers and 2 fronts have noticeable high frequency interference (a sort of whispering), particularly when people are speaking. - i can only hear this if my ear's right by the speaker though, not normal listening position.

When i change back to all channel stereo, stereo, all mono etc all the speakers are fine and sound clean.

I have good QED micro speaker cable and good quality optical interconnects.

The AV shop i bought it from have tested it and said that's normal signal degredation as the signal is being processes from stereo to 5.1 - i can understand the logic but i was hoping for around £1K I would get a much cleaner surround from stereo input. The other thing which is a factor is my surround speakers are about 2m from listening position so are louder (as is this interference) when you put your ear to them.

To be fair you cannot hear this interference in normal listening position.

I just wanted some reassurance that this is indeed normal for AV recievers with PLII and other similar processing such as Neo 6.

When I use Dolby Digital the sound is great and what i would expect for surround sound. It's just i hoped i would get a similar experience with normal TV. I presume i'm asking to much.

Look forward to any replies.
Thanks,
Rob

docrob · 01-25-07, 05:30 AM

Sorry i think i've posted in wrong place - can someone delete this thread and i'll repost elsewhere.
thanks.

01-25-07, 04:51 AM	#1 \| Link	<a href='http://rev.avsforum.com/phpAdsNew/adclick.php?n=a4ac4393' target='_blank'><img src='http://rev.avsforum.com/phpAdsNew/adview.php?what=zone:30&n=a4ac4393' border='0' alt=''></a>
docrob New Member Join Date: Jan 2007 Posts: 7	Pro Logic II - high frequency interference Hi, I'm new to all this surround sound stuff so excuse my ignorance. Just got Onkyo TX-SR674E AVR and Monitor audio surround 5.1 (4 x radius 45 and radius 180 centre). I've set it all up with automatic setup which callibrates everything. When i listen to Sky TV program or any stereo input (ie freeview) through Dolby PLII or Neo 6 the surround speakers and 2 fronts have noticeable high frequency interference (a sort of whispering), particularly when people are speaking. - i can only hear this if my ear's right by the speaker though, not normal listening position. When i change back to all channel stereo, stereo, all mono etc all the speakers are fine and sound clean. I have good QED micro speaker cable and good quality optical interconnects. The AV shop i bought it from have tested it and said that's normal signal degredation as the signal is being processes from stereo to 5.1 - i can understand the logic but i was hoping for around £1K I would get a much cleaner surround from stereo input. The other thing which is a factor is my surround speakers are about 2m from listening position so are louder (as is this interference) when you put your ear to them. To be fair you cannot hear this interference in normal listening position. I just wanted some reassurance that this is indeed normal for AV recievers with PLII and other similar processing such as Neo 6. When I use Dolby Digital the sound is great and what i would expect for surround sound. It's just i hoped i would get a similar experience with normal TV. I presume i'm asking to much. Look forward to any replies. Thanks, Rob

01-25-07, 05:30 AM	#2 \| Link
docrob New Member Join Date: Jan 2007 Posts: 7	Sorry i think i've posted in wrong place - can someone delete this thread and i'll repost elsewhere. thanks.