[SBE] Hybrid issues.

[Taylor, William W.]

Hi Curt,

I'm wondering. Is this problem being detected at the studio monitors,
the DJ headphones, over the air? Are they all being fed with the same
source audio (PGM)? If it is not present on-air, have you considered a
delay in the signal to the headphone pre-amp or studio monitoring
system? Maybe an intermittent change of analog phone line voltage. 

Bill 


William W Taylor CEV, CEA, CBT
Broadcast Technical Services Coordinator
City of Gainesville
200 East University Ave
Mail Station 68
Gainesville, FL 32602
(352) 316-5973

-----Original Message-----
From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of Curt
Yengst
Sent: Thursday, January 29, 2009 11:42 AM
To: sbe member discussion mail list
Subject: Re: [SBE] Hybrid issues.


>From Jerry at Wheatstone:

 
Hi Curt,
 
The signal that is present at the Hybrid 1 and Hybrid 2 outputs is
whichever bus is selected by the MXM feed (caller feed)switch, minus the
appropriate caller, even if the caller is assigned to that bus. For
example with the SP-75 assigned to PGM, (which puts both callers on the
PGM bus) and with the MXM feed switch set to PGM, at the Hybrid 1 output
you would hear everything that is assigned to the PGM bus, including
caller 2, but minus caller 1. At the Hybrid 2 output you would hear
everything that is assigned to the PGM bus, including caller 1, but
minus caller 2.
 
The Composite Out includes the DJ, both callers, and any any audio that
feeds the callers. 
 
Mics out includes all the same audio as is at Composite Out, minus both
callers.
 
Jerry
 
 
 
So it sounds like the Hybrid Outs provide a "mix-minus" to the hybrid,
just like "mics-only."  Still, it might be worth a try to send the
"mics-only" output to the Telos input.
 
 

________________________________

From: sbe-bounces at sbe.org on behalf of Chris Tarr
Sent: Thu 1/29/2009 10:59 AM
To: sbe member discussion mail list
Subject: Re: [SBE] Hybrid issues.



Curt-

I may be reading that wrong, but wouldn't you want "mics only" to feed
the hybrid?  Not sure what the "hybrid out" feed would do (except maybe
offer an option to send audio form the audition channel down the
line) but the only thing that should feed the hybrid on a regular basis
is the microphones.  While an echo is indicative of poor cancellation,
it seems like maybe the caller audio is getting fed back down the line.

-Chris

Christopher "Doc" Tarr CBRE, CBNT, DRB
Director of Engineering/IT
Entercom Milwaukee/Entercom Madison

On Thu, Jan 29, 2009 at 9:46 AM, Curt Yengst <cyengst at star991fm.com>
wrote:

> Dear partners in crime:

>

> I'm in the process of troubleshooting a complaint from some of our

jocks.

> When they take calls on our Telos 2x12, sometimes the call will have a



> bit of feedback/echo under the caller.  If the jock pots down the 2x12



> output at the console, it can be somewhat controlled, but then the 

> complaint is that the caller audio is too low in level (duh!).  It 

> doesn't happen on every call, but it's enough to irritate them.  We 

> have the Telos 2x12 connected to a Wheatstone D-75 audio console, 

> using their SP-75 "Superphone" input module, which has its own 

> mix-minus.  It also has the ability to generate separate outputs for 

> hybrid out, "mics only" out (everything but the caller), and "callers 

> only" out.  We're using the hybrid outs to feed the

> 2x12 inputs.  The Caller 1 output of the 2x12 (which gets used almost

> exclusively) is split with a Y-cable, with one side going to the 

> caller input on the Superphone module and the other side going 

> directly to the caller side of our VoxPro workstation.  One jock 

> claims it only happens on live calls, not on pre-recorded calls.

>

> I e-mailed Telos, and the answer was basically that it was a phone 

> company issue (poor echo cancellation), and since it was coming into 

> the station sounding that way to begin with, there was nothing we

could do about it.

> Wheatstone basically said the only way their equipment would possibly 

> exhibit this issue was if caller conferencing wasn't properly set up.



> Since the problem happens with single callers, this is moot.

>

> Any thoughts?

>

> Curt Yengst, CSRE

> WAWZ

>

>

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