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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Soundstage question posted by amdan on August 29, 2006 at 03:27:21:
First you cannot get in-phase stereo information outside of the speaker on the same plane as the speaker. What you can get is out of phase information which can be the result of reflections (see post below) or out of phase information in the recording.Many test disc's have a track which assists simple speaker set up by someone talking both in-phase and out of phase. When the voice is in phase it is centered between your two speakers, when its out of phase in a perfect system it will be coming from everywhere, but more likely as in my system (which is not set up 'perfectly' because of room limitations) it is mainly coming from each speaker with no center image whatsever. What is revealing in this test is that if one of the two speakers is adjacent to a wall and the wall/ceiling is not treated sufficiently the out of phase voice will seem to locate mainly from the location of these reflections on the side wall.
The object in speaker set up, once you have achieved the best balance you can in-phase, is to position your speakers (or treat your room) to remove these reflections (often this can be done by things as simple as rethinking the toe in you are using - for example crossing the axis of your speakers well in front of you listening position - however this is speaker dependent, works for some, not all types). When you accomplish that you should be getting the best that your equipment/speakers/set of of speaker location and listening position can provide, which can be, depending on your equipment and devotion, having an unbounded holographic soundstage with natural width and depth without a sence of a rear wall extending back as far on the sides as the center. A good set up, good equipment, and a good recording can sound absolutely spooky in its ability to sound like it could be the real thing (except for the unobtainable things like dynamics etc.)
In set up I use two different recordings, Depth of Image by Opus 3, and The Sheffield/XLO Test and Burn in CD. They provide all the info I need, but as a supplement you can use one of the SPL meters and a test disc with 1/3d octave pink noise - this can be very helpful in finding the best speaker/listening positions for bass response.
There has been a ton of information written on this subject in the archives - if you're really serious about good set up I would suggest you review it. If you want some down and dirty, quick, and opinionated help, identify your equipment, provide your room dimensions, a description of openings and furnishings as well as a description of your present set up and what limitations you might have to making changes. I'm sure lots of folks would be willing to help you.
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Follow Ups
- OK here is some of the skinny on sound staging...... - Chuck Y 08/29/0607:04:24 08/29/06 (5)
- Re: OK here is some of the skinny on sound staging...... - mcondo 13:30:08 08/29/06 (1)
- The track with the recorder is really a 'test 'for high frequencies.... - Chuck Y 14:04:51 08/29/06 (0)
- The Sheffield/XLO Test and Burn in CD - beppe61 11:07:20 08/29/06 (0)
- PS - I just looked up your system and.... - Chuck Y 07:18:51 08/29/06 (1)
- Re: PS - I just looked up your system and.... - amdan 03:59:18 09/3/06 (0)
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