Home Theater Systems - Electronics and Forum - HomeTheaterShack - View Single Post - Impulse response to set delay?
View Single Post
Old 01-08-08, 02:26 AM   #1 (Link)
 
atledreier
Senior Shackster
Alias: Maverick
Loc: Sandnes, Norway
User: #7168
Since: Mar 2007
Posts: 551
atledreier is online now
Impulse response to set delay?


Hello!

I've been toying with the idea of using Impulse Response graphs to time-delay my speakers properly.
My pre/pro have analog 7.1 inputs, and I plan on using these to do each speaker in turn. I will use the closest speaker as 'reference' as that will then always be the first impulse to arrive, and run two-channel sweeps and look at the impulse response to set timing.

My problem is this: My 7.1 channel input is analog bypass, so my regular distance, bass management and other settings don't apply to that input. So any distance settings I use would have to be calculated based on the impulse response. Will this be accurate enough?

So I plan to do this:
Run a sweep with my reference speaker and one of the others. The impulse graph will show a 'doube peak'. The time difference between these peaks will be the difference in distance between the speakers. So I take the time difference in ms and add a foot for each ms. Then add the distance of the reference speaker. Will this be correct?
I then use the same reference speaker, and do the same for the next speaker.

The problem is that I can't check my corrections, as my input doesn't use the distance settings in my OSD. Any tips on how to do this?

REW should be able to output 5.1 or 7.1 to digital with selected channels. Now that'd be sweet!


Forum Rules Reply With Quote