[grc] Sound Quality Issues

[David Goodman]

As an aside: isn't it great to have a brain trust / hive mind / repository
of critical information etc., etc., to count on?

Cheers,
dg

On Thu, Nov 10, 2016 at 10:42 PM, David Klann via grc <grc at maillist.peak.org
> wrote:

> Donna and al,
>
> We did "wiggle" some of the wiring between the mics and the mixer, and
> we reseated the connectors too. I hadn't considered cold solder joints.
> After checking the phase and polarity of connections I'll add that to
> the list of things to hunt down.
>
> al, we *do* have electrically separate mic preamps. I'll be going
> through all the cabling in the next few days to make sure things are as
> they should be.
>
> Thanks again everyone!
>
>   ~d
>
>
> On 11/10/2016 08:22 PM, Donna wrote:
> > Could be a blown diaphragm or cable connection, or a cold solder that
> finally gave out.
> >
> >                    Donna DiBianco
> >         Station Start-up Specialist
> >
> >> On Nov 10, 2016, at 5:45 PM, Ken Freedman via grc <
> grc at maillist.peak.org> wrote:
> >>
> >> This most definitely sounds like a phase issue  the dead giveaway being
> >> that the problem worsens when you put it into mono. Phase is when the
> >> polarity of either the left or the right channel gets reversed so the
> left
> >> and right channels either partially or completely cancel one another
> out.
> >>
> >> Common sources of things being out of phase are miswired jacks and
> cables.
> >> Sometimes records and CDs also get manufactured out of phase. You can
> >> analyze phase in many audio editing programs such as Pro Tools or Adobe
> >> Audition. I am not sure if Audacity will measure phase or not. We use an
> >> oscilloscope to read phase at FMU.
> >>
> >> -Ken
> >>
> >>
> >> - Ken Freedman
> >>
> >>
> >> ~~~~~~~~~~
> >> Audience Engine / WFMU
> >> PO Box 2011
> >> Jersey City, NJ 07303-2011
> >>
> >> Contact Methods Ranked Best to Worst:
> >>
> >> ken at audienceengine.net
> >> ken at wfmu.org
> >>
> >> @WFMU
> >>
> >> http://wfmu.org
> >>
> >> (201) 521-1416 ext 225
> >> ~~~~~~~~~~~
> >>
> >>
> >>
> >>
> >> On Thu, Nov 10, 2016 at 5:26 PM, David Klann via grc <
> grc at maillist.peak.org>
> >> wrote:
> >>
> >>> Greetings Fellow Radio Geniuses!
> >>>
> >>> We're running into an audio quality issue here at WDRT 91.9fm in rural
> >>> Western Wisconsin. I'm past the point of tearing my hair out in search
> >>> of the root cause. I'll outline what I can here, and answer further
> >>> questions as they come in. Thanks in advance for your thoughts and help
> >>> diagnosing this.
> >>>
> >>> Some facts:
> >>>
> >>> - The quality of *some* (not all) spoken-word audio recorded in our
> >>> "Studio B" sounds like it was recorded with the person speaking through
> >>> "a metal pipe while in a tunnel" (that's the best description we've
> been
> >>> able to come up with)
> >>>
> >>> - It *sometimes* depends on the radio people are listening to when it
> >>> happens
> >>>
> >>> - Music recorded in the same studio from any source (analog vinyl, CD,
> >>> digital source, etc) sounds just fine
> >>>
> >>> - One listener has noticed that it sounds "bad" when they listen with
> >>> their home receiver set to "mono" mode, and when they switch to
> "stereo"
> >>> mode it sounds fine
> >>>
> >>> - The same audio sent to our Internet stream *usually* sounds "normal",
> >>> but sometimes sounds "bad"
> >>>
> >>> This has been an otherwise productive exercise for us because we've
> >>> learned of a few other misconfigurations in our audio chain. But this
> >>> one continues to haunt.
> >>>
> >>> Again, I appreciate any thoughts you can share, and will provide more
> >>> info as requested. If off list, I'll summarize the "fix" to the list
> >>> when we figure this out.
> >>>
> >>> Thanks!
> >>>
> >>>  ~David Klann
> >>>   WDRT, 91.9fm, Viroqua, WI
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> grc mailing list
> >>> grc at maillist.peak.org
> >>> http://maillist.peak.org/mailman/listinfo/grc
> >>>
> >>>
> >> _______________________________________________
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> >
>
>
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