all about multi audio

[argi]

Καλος μπουσουλας και βοηθεια για το πως ξεκινησαν και που παει το πραμα.Επειδη δεν ξερω να ανεβαζω φωτο βαζω το λινκ και απλα διαβαζετε.
http://soundoctor.com/surround.htm

 

[gstriftos]

The EARLY DAYS of HOME THEATER - ENTER THX

Once we get past the phenomena of stereo, we arrive at the next historical stop: the suggested THX setup with DIPOLES placed at 90 degrees. The listener is sitting in the null of the out-of-polarity (often somewhat incorrectly stated as 'phase' - they are actually "180 degrees out of phase") surround dipoles, and the dipoles are splaying the Ls Rs outward along the walls of the room. This decorrelated [side] splay gives the listener the sense they are in a large(r) theater.

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Fig (1) - one of the original THX SETUPS

Notice in the above diagram there's NOTHING behind you. (Of course many people place the surrounds "anywhere" because that's the only place they'll 'fit' or 'go'.) Some people put the "surrounds" in the back, or incorrectly stated, in the "rear". This is psychoacoustically and psychologically wrong.

 

[gstriftos]

Fig (2) - Typical 5.1 suggested setup.
This is the STANDARD SUGGESTION for "SURROUND SOUND".

This diagram does not presuppose you put speakers in a circle - although that would be best. The supposition is you extend the angular lines outward until they intersect a wall and you put the speakers on that wall. IF front-firing speakers are used, (at the Ls Rs positions) you aim them as shown. If TRIPOLES are used, you place them flat on the wall, so that the correct ratios come out of the [sides of the] box and splay on the walls.

 

[gstriftos]

6.1, 7.1 and MORE

FIG (3) - 7.1 Channel setup for the home theater


The angles of the Lb Rb speakers becomes part of a psychoacoustic balance: if you think there's sound that DOESN'T BELONG behind you, it will be frightening. If it properly blends into the scenario of the film and the rest of the acoustic phenomena happening in the room, it will feel "correct". It would seem that firing a speaker right into the back of your head cannot be correct. My suggestion is to make the back pair about half the subtended angle of the front pair, therefore about 30 degrees a part.

 

[gstriftos]

Ωραίο λινκ Αrgi!:615:

 

[JOHN MARKOU]

Απάντηση: all about multi audio

oh yes , great indeed.

 

[Κώστας Φ.]

Και οι αντίστοιχοι προβληματισμοί από τους "οπαδούς" του δικάναλου ήχου: Κλικ
Το αρχικό άρθρο του Δ. Σταματάκου: Κλικ

 

[argi]

Απάντηση: Re: all about multi audio

Ωραίο λινκ Αrgi!:615:

be well