Thanks Kevin--
I'm making Colo. camping plans today. Ditto everyone's remarks. Maybe
I'm using different cues in front of my speakers, but I think the
subtle impression of the far sides having slightly more heaviness
compared to the center (thus "hole") is from the "roundness" of lower
register frequency response of the omnis in free air. This impression
is not really a concern as it can be addressed easily in post--
probably by lessening the resonance ~230? Hz on the sides. What it is
NOT characteristic of the Kevin's array is clustering of the low
frequencies in the middle of the field that we tend to get with
coincident arrays. Its hard for us to tell if there's front-back
confusion in this Jecklin recording-- which can be strength or
weakness depending on one's aesthetic or goals.
I'd expect a little bit more richness in the lowest harmonics. Is
there some LF roll-off employed or were you that far into the
"wilderness?"
See inserts below:
At 9:07 AM -0500 10/5/10, Curt Olson wrote:
>Thank you for posting this Kevin,
>
>I agree with Mark that it delivers a nice sense of space combined with
>good localization of individual callers. I think I detect a slight
>"hole-in-the-middle" effect, but it's not profound. Overall, an
>excellent example of what Jeklin rigs can do. Come to think of it, if
>I recall correctly, two of the most impressive nature recordings I've
>ever heard were captured with Jeklin-type variants (john and Rob,
>please correct me if I'm remembering this wrong)...
>
>1) John Hartog's June 2005 clip "An early morning chorus along
>Murderers Creek," located about 2/3 down his Sound Journal page:
>
><http://www.rockscallop.org/JVp2.html>http://www.rockscallop.org/JVp2.html
>
>2) A goose fly-by captured by Rob Danielson last April along the St.
>Croix river in Northwestern Wisconsin. You can hear it about one
>minute into the audio clip near the bottom of this write-up on the
>2010 Midwest Nature Recordists Campout:
I can think of examples with better imagery made with your
experimental boundary arrays, no problemo,..
So that clip was from just the rear pair? If so, that's a non-cored
"Jecklin" array. By "non-cored" there's just a 2" high density foam
baffle-- no interior barrier core. Caveats are: costly 2-mkh 80's
with the array actually pointed into a sloped rock wall bowl 20 feet
away. Some of the directionality provided by the bowl reflector is
angled up into space where the goose passes over at tree top level--
so (luckily) quite close. Its a Pseudo-Jecklin/large Scale Pseudo
Parabolic Dish array. You can hear the same heavy roundness on the
edges that is in Kevin's recording from the free air omnis--
especially on the left which is where the rapids from the river were.
The PBB2's recording of the event has less body/closeness but more
depth imaging. With this surround pair, I place the Jecklin closer
point sources and rely on the PBB2 for reach. The Jecklin is not as
good for distant subjects so they can play off each other's
strengths, when I get lucky.
><http://www.trackseventeen.com/soundblog/2010/crex.html>http://www.trackse=
venteen.com/soundblog/2010/crex.html
>
>The recent talk here about Jeklin rigs has me pondering how one could
>deal with three practical concerns that have kept me from going very
>far down that road: ruggedness, compactness and wind protection.
Here's a photo of my updated Jecklin.
http://tinyurl.com/2ezk2vq
The disk is a piece of scrap aluminum sided, 3/4" close-call foam
insulation. The absorbing material is thick carpet padding. The arms
are hinged/foldable with thumbscrew joints oak. I used a curled a
piece of vinyl gutter cover around the ends for baskets. The dead air
space could be larger. Natural burlap screens. The very light weight
dish slips off the PVC post and it all collapses into my small
backpack.
Transporting the 4' X 8' heavily-insulated sound barrier to set up 2'
behind for rear rejection is where I get the needed exercise. ;-) Rob
D.
>
>Curt Olson
>
>Kevin Colver wrote:
>
>> I built a home-made Jeklin disk and recorded with a pair of
>> Sennheiser ME62 mics this summer. Here is a sample of how it did:
>>
>> <http://tinyurl.com/3y9a66e>http://tinyurl.com/3y9a66e
>>
>> Listen and feel free to give judgement on how the array does with
>> spaciality, ect. I posted it mainly for our nature recordists
>> because of Rob's discussion about his Jeklin.
>>
>> It's also at www.7Loons.com or at the iTunes Store under the
>> "Soundscapes for Birders" podcasts.
>>
>> Thanks,
>>
>> Kevin Colver
>>
>> www.7Loons.com
>
>
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