--- In Walter Knapp <>
wrote:
> David Kuhn wrote:
> > Aloha listeners,
> > I'm using a pair of Senn ME62's with Shure A96f Line Matching
> > Transformers in a Jecklin arrangement for ambient sound. There is
> > what seems significant imbalance in the channels when viewed in
> > CEPro: for example Left channel -8.5dB vs Right Channel -
7.1dB;=20=20=20=20
> > L -5.7dB vs R -4.9dB.
> > Should I expect better balance than this? The problem is
apparently
> > not the transformers, as switching them made no difference.
>
> Did changing the direction the pair were pointed change this? It's
not
> at all uncommon when recording in stereo for the sound levels to
differ
> from the two sides. The mics are recording different soundfields.
The
> indicated level includes everything going on in each soundfield,
not
> just the subject you are paying attention to. Often low frequency
> background sounds are a major contributor.
>
> You can, in fact zero in on a caller and place him mid center by
> watching the metering. Though I consider that a bit dull way to
record.
> Just like photography you want to place your subject a bit off
center
> for better composition.
>
> I try to watch for a persistent imbalance between the two channels
and
> reposition to maintain a better balanced field. Unless I'm
deliberately
> recording unbalanced for some reason. This is where listening with
good
> headphones while recording comes in.
>
> As far as if there is something wrong, the difference is minimal,
but
> you can test with a fixed sound source.
>
> Walt
>
--- In Dan Dugan <> wrote:
> Try switching the inputs to the recorder, left and right. If the
> problem moves it's outside the recorder, if it doesn't, it's in the
> recorder or the transfer process.
>
____________________________
Thank you Dan and Walt---
Beg pardon, I should have mentioned that I had already determined
that the problem is outside the recorder (MZR-50), having switched
the mic's side-for-side and noted that the problem flipped channels.
And as I said, switching the transformers made no difference.
So, the imbalance is in the mics, and as Walt indicates, "the
difference is minimal, but you can test it with a fixed sound
source" I did test it with a kitchen timer, with mic's centered on
the source. The measurements I mentioned (Left channel -8.5dB vs
Right channel -7.1dB; L -5.7dB vs R -4.9dB) were from that test, as
read in CEPro. Is this imbalance correctible thru repair?
I may simply be expecting too much from the ME62's, and need to quit
whinin' and step up to a higher quality ambience-mic'ing setup. Even
after all the discussion in this group about different ambience
mic's, I can't decide what to go for, the only certainty is "up"
($$). This refrain must sound familiar to most of us.
Much Aloha,
David
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