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Conference hips::uk_audioo

Title:	You get surface noise in real life too
Notice:	Let's be conformist
Moderator:	GOVT02::BARKER

Created:	Thu Jul 28 1988
Last Modified:	Mon Jun 02 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	550
Total number of notes:	3847

238.0. "Dolby Surround Sound Processors" by PAKORA::GAITKENHEAD () Tue Dec 04 1990 05:18

    Hi,
       I was wondering if any of you out there has had any experience with 
    Dolby Surround Sound processors. The reason I'm asking is that I'm
    thinking of adding one to my AV system and would like to hear from
    anyone else who either has one or is thinking of getting one.
    From browsing in various Hi-Fi mag's I've only really noticed three
    manufacturers ; Yamaha, Marantz and Sherwood (I recieved the Sherwood
    catalog this morning and have not had time to read it yet).
    My main question is whether the surround experience is worth the cost
    of these machines.
    
    						Geo.

T.R	Title	User	Personal Name	Date	Lines
238.1	YAMAHA's are good	MEO78B::PHILIPSEN		`Wed Jul 03 1991 09:12`	11
	Hi, I am also in the market for Surround Sound. From what I can see the latest YAMAHA's are the go. They have plenty of Power for home usage and incorporate a receiver and AMP. See note titled HELP: New A/V system. (I forgot number but I put it in on 2-7-91) Regards Dave
238.2	Accept no imitations!!!	YUPPY::AMERR		`Tue Feb 11 1992 12:47`	17
	I don't know about specific makes, but it's worth confirming that the boxes you are considering have the genuine Dolby chips in! These are the only ones that will achieve the correct phase de-coding of the surround channel. The surround info is phase encoded onto the L/R master at the film dubbing stage, and the video master is a dierct 1 to 1 of the film master. Some "surround" de-coders mimic the effect by a crude sum and difference technique. A properly set-up system should sound nearly as good as the original theatre version; don't set the surround channel volume too high, as it will bleed some front audio to the surround speakers, and destroy the subtlety of the effect. You should only really be aware of the effect on plane passes etc. If you need more info let me know; I used to work for Dolby Labs! Russell.
238.3	Are these genuine Dolby?	UPROAR::GUNNS	Biodegradable and ozone friendly	`Wed Feb 12 1992 15:12`	6
	Russell wrt .2: Do you happen to know if the Akai VCRs with built in decoders are the real McCoy? Steve
238.4	Labels	BAHTAT::HILTON	How's it going royal ugly dudes?	`Thu Feb 13 1992 15:36`	4
	I guess you know if the manaul and box have dolby logos all over them, with suitable, dolby is a trademark kind off statements. Greg
238.5	Akai vid	CURRNT::PAYNE_A	Discount Pants'n'Haircuts	`Tue Apr 28 1992 16:50`	4
	The actual machine has the Dolby Double D + Surround logo on it, so I would think it has. Andy
238.6	Dolby Rear Effects Bookshelf type Speakers	PEKING::TAFF::Wob	Robert Screene, UK Finance EUC	`Tue Dec 15 1992 09:48`	28
	Hi, I've now managed to obtain a NICAM TV with a proper Dolby Surround decoder (without the full Pro-Logic and it's extra centre channel). The set's internal front speakers can be switched out, leaving the full raw power of 20w+20w (probably peak rated at 10% thd) for driving the rear surround speakers(!). It sounds to me as though the TV's internal amp is not too bad, especially considering my requirement of it; only driving the rear surround speakers. Apparently the dolby decoded rear effects only span 100hz-7khz. The bundled (Toshiba) plastic cans are a little crude. I'd like to replace them with something sweet, small, efficient and preferably under �150 for a pair. I currently notice the rear ambience is OK, but get a little harsh when asked to portray anything louder than a whisper. I have noticed: �120 Heybrook Prima - What Video: great for AV, touchy on placement �100 Mordaunt-Short CS-1 What Video: value-for-money AV speaker. Anyone else set-up a surround system recently and would be prepared to comment on the experience. Regards, Robert.