[SBE] Hybrid issues.

[Curt Yengst]

It's a little hard to describe without actually hearing it.  As soon as the caller starts talking, you hear a very slight "howl" (like feedback) under them, and in some cases you can also hear their voice echoing under that.  It does have a sort of "comb filter" flavor to it.  It doesn't happen with every call though.  I was ready to blame it on cell phones, but the jock claims he's heard it on land lines as well.  Of course, even land lines these days go through all manner of A/D conversions, delays, and such.
 

________________________________

From: sbe-bounces at sbe.org on behalf of chscherer at everestkc.net
Sent: Thu 1/29/2009 11:19 AM
To: sbe member discussion mail list
Subject: Re: [SBE] Hybrid issues.



Then it's not listener radio delay coming back in.

Feedback and echo are two differnent symptoms. Can you clarify? Feedback (even comb filtering) would point to a problem in the mix-minus. Echo points to phone line blead.

----- Original Message -----
From: Curt Yengst <cyengst at star991fm.com>
Date: Thursday, January 29, 2009 10:07 am
Subject: Re: [SBE] Hybrid issues.


> Not sure this is the issue.  Although we don't use a profanity

> delay (yet), we do delay our analog signal to match up with our HD

> signal, which creates an on-air delay of about 8 seconds.  This

> feedback/echo is happening almost instantly (less than half a second).

> ________________________________

>

> From: sbe-bounces at sbe.org on behalf of chscherer at everestkc.net

> Curt said:

> "One jock claims it only happens on live calls, not on pre-

> recorded calls."

>

> Is it this simple:

> Are the problem callers not turning their radios off?



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

> From: Chris Tarr <chris at broadcastdoc.net>

> > 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.




> > On Thu, Jan 29, 2009 at 9:46 AM, Curt Yengst

> > > 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?

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