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Author Topic: Number designation for 7.1 Audio Systems
Frank Angel
Film God

Posts: 5171
From: Brooklyn NY USA
Registered: Dec 1999


 - posted 01-31-2018 02:55 PM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
I am not familiar with 7.1 a channel numbering. Do you go clockwise around the room starting with L, C, R screen channels being 1,2,3 and then go up the right wall, then across the back, then down the left wall ending up with Channel 7 being the Left side wall channels closest to the screen. Does the numbering keep the 5.1 numbering or does everything totally change with 7.1? This consumer processor they are using just uses English terms to designate channels. I find that becomes totally insane the minute someone start abbreviating them to put labels on wires.

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Carsten Kurz
Film God

Posts: 3626
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 01-31-2018 05:13 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
The common cable labeling follows THX standard.

In general, the scheme in the room follows our left-to-right-reading fashion, but groups left/right pairs

Left/Right 1/2
Center/LFE 3/4
Left Surround/Right Surround 5/6
Back Surround Left/Back Surround Right 7/8

For a better structuring of the normal surrounds and back surrounds, I often see

Lss for Left Side Surround and Lrs for Left Rear Surround

Note that Ls/Left Surround is for 5.1 systems, and Lss/Left side surround is for 7.1, as they do no carry the same signals. Still for a 7.1 system, physical wires should be labeled with Lss/Rss and Lrs/Rrs. For people with some basic knowledge about the difference between 5.1, 7.1 and Hifi/Home cinema, the common mix of labels should pose no problem, like SW, BSL, SL, SBL, RS, RRS.

Also see: http://isdcf.com/papers/ISDCF-Doc4-Audio-channel-recommendations.pdf

- Carsten

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Frank Angel
Film God

Posts: 5171
From: Brooklyn NY USA
Registered: Dec 1999


 - posted 01-31-2018 09:03 PM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
Carsten, thanks for the clarity.

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