Some techie questions for an AV expert please. AV Processing.

[RobinKidderminster]

Can someone help with some technical info wrt the way in which an AV receiver processes signals. Am I right in these assumptions please?

a) When the signal is DD 5.1 or better (Dolby HD etc), then the LFE channel is fed directly to the sub irrespective of crossover settings. The other bass frequencies in the main channels will also be fed to the SW but only those below the crossover frequency.
b) When the signal is Dolby PLII etc (no disctrete channels) then all bass frequencies are fed to the SW through the crossover filter.
c) When 'PURE' is selected the amp sends signals to each speaker without any regard to crossover.

The reasons for this query (apart from academic interest) is that if these assumptions are correct then different settings of the SW would be ideal and hopefully the settings for LARGE/SMALL and crossover settings can be better adjusted.

These thoughts have been provoked following YMAO settings on my Yamaha amp giving crossovers settings between 40Hz and 160Hz dependant on setting the 'speaker type' as either 'FLAT' or 'FRONT'.

Hope this all makes sense and someone can help. Thanks in anticipation.

Meanwhile ... back at Silverstone ...

 

[RobinKidderminster]

Well Silverstone was a disappointment too!

 

[bigboss]

a) Yes

b) Not sure. My understanding is that if LFE is used in a Dolby Pro Logic II mix, it must be enabled in the encoder. The default settings ignore the LFE-channel information.

c) Yes

Bear in mind, I'm no AV expert.

 

[RobinKidderminster]

Thanks BB. So (c) PURE on the Yamaha or similar with other amps ignores all processing including crossover & large/small settings. I use pure in stereo but I guess to use it with discrete 6 channel the sub needs a specific setting since it is only outputting the LFE channel.

I hope you understand where I am going with this but in tweaking settings different sources may need different settings and it has influence on any 'reference' media. My sub has 3 settings which could be used for each source.

I wonder how others choose their reference source to setup their systems.

Cheers

 

[RobinKidderminster]

After hours of fiddling I think one button (PURE) sorts it all. Back to the drawing board! Next question maybe? Are all these processing modes a waste of time? I'll be back!