[SBE] audio problem

[Henry Seiden]

Maybe this issue is one of cumulative (over-)processing or an out-of-phase
condition not easily detectable by listening to (I'm guessing here as to the
program material, so help me out please) mixed voice tracks as Al suggests.
It could be something else that requires more detective work.

Either way some more info is needed. Perhaps a (dare I say it?) SBE
certified or other contract engineer could verify the following:
* Monitoring equipment available?
* Aircheck audio available?
* Wiring check? 
* Physical bypass comparison?
* Happens at multiple stations?
* Settings on the device that compound one of the above problems?


On 8/22/07 09:51, "Albert Muick" <radioresearch_field_operations at yahoo.com>
typed:


> 

> Hi Guys,

>    

>   Sounds like a kinda basic problem, so I am replying to the group and the

> gentleman as well.

>    

>   If it's OK in his studios, and the stations' studios, but sounds bad on the

> air, it seems to me that it's nothing specific to the make/model of his audio

> chain equipment.  It sounds like a phasing issue (make sure his left/right

> outputs follow the inputs) or the fact that his processed audio is being

> re-processed by the stations' audio and modulation chain.

>    

>   If the left/right outputs from his device are reversed, it could conceivably

> cause this condition, however, he states that when the device is out of the

> chain, everything is normal.  What he doesn't state is whether the device is

> internally bypassed or it is patched around.  This could give us further clues

> in a phasing issue.

>    

>   As we all know, re-processing processed audio makes one's signal sound like

> the s*** sandwich of the airwaves.  I think it could be the stations'

> compressor limiter (Orban/Omnia) that is re-processing this and causing the

> troubles.

>    

>   Any other ideas?

>    

>   Best regards,

>    

>   Al Muick, CBRE

>   

> 

> John Poray <jporay at sbe.org> wrote:

>   Can anyone on the SBE Roundtable offer an opinion to the audio problem

> described in the message below? The person asking the question is not a

> member of SBE and therefore not subscribed to the Roundtable so please reply

> off-line to him. admaker at ntelos.net

> 

> 

> 

> Thanks,

> 

> John Poray 

> 

> *****************************************

> 

> John L. Poray, CAE

> 

> Executive Director

> 

> Society of Broadcast Engineers, Inc.

> 

> 9102 N. Meridian Street, Suite 150

> 

> Indianapolis, IN 46260 USA

> 

> Phone: (317) 846-9000 Fax:(317) 846-9120

> 

> jporay at sbe.org

> 

> 

> 

> -----Original Message-----

> From: Michael Holmes [mailto:admaker at ntelos.net]

> Sent: Tuesday, August 21, 2007 6:55 PM

> To: mclappe at sbe.org

> Subject: Request re signal processor difficulty

> 

> Sirs:

> 

> I am a radio commercial producer of 30 years experience.

> 

> I have a signal processor called an SPL (Sound Performance

> Laboratory, Germany) Vitalizer. It enhances audio signals with a

> combination of dynamic EQ, amplitude-controlled phase correction and

> harmonic filtering. The result is greatly enhanced transparency.

> 

> This device is used in recording studios, post-production

> facilities, and live sound reinforcement. It is advertised for these

> purposes plus as an enhancing device in broadcast facility audio chains.

> 

> For some reason, it distorts my commercials on the air, and has

> since I began using it. I hear no distortion whatsoever in my studio. I

> use its effect sparingly. I'm not overdriving anything, and people at the

> stations say that my MP3's sound wonderful in their monitors (internal, not

> off-air monitors, which exhibit the distortion to them as well). The

> company that manufactures this device is well-respected worldwide and has a

> good-sized range of audio products:

> 

> SPL Home: http://spl-usa.com/index.html

> 

> Vitalizer page: http://spl-usa.com/V_MK2/in_short.html

> 

> If it is possible, I would like to put this problem before your

> membership in the hope that someone has had experience with this device and

> can offer insight or solution to this difficulty.

> 

> I think it important to note that only someone familiar with

> this device will be able to address the issue. Again, my levels are good,

> and are identical with or without the device in the chain. With the device

> I get on-air distortion. Without I don't. To the best of my knowledge

> there are no other variables or differences. The stations report that

> in-house everything sounds fine.

> 

> Thanks very much!

> 

> Michael Holmes

> 

> admaker at ntelos.net

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

> 

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