Thanks Curt- I was experimenting with omnis on two, spaced, parallel
boundaries last week and I was consistently aware of a mid range lift
and improved lateral spatial definition. The 3032's are inherently
"huskier" so I'm not confident of my ability to sort this difference
out when comparing the arrays. I also heard considerable 3K+ Hz
"bite" in the 183's which may stem from the 183 capsules and/or
perhaps the higher percentage of direct vs reflected sound with the
boundary effect. At any rate, with these recordings, I prefer both
the image and the tonal balance of your rig/183's. I'm not sure the
volume is matched close enough for extreme scrutiny, but here are the
sonograms I got from the fireworks flurry:
https://pantherfile.uwm.edu/type/public/temporary/FireworksTest_Sonograms.gif
Rob D.
At 10:54 PM -0500 6/22/06, Curt Olson wrote:
>Rob Danielson wrote:
>
>> With Curt Olson's double boundary rig, he places omnis, front-facing,
>> next to two, hard surfaced, wood boundaries. The two boundaries are
>> separated about 4" so the capsules are around 6-7". I'll dig-up Curt's
>> photos.
>
>Here they are, Rob...
>
>http://www.trackseventeen.com/images/mic_arrays/3032_183.html
>
>A couple weeks ago the little suburb where I live held its annual
>community festival, which included a local country-western band and
>some fireworks at the city park about a half mile from my home. For
>kicks, I set up two mic arrays in the yard to make some comparisons.
>One was a modified ORTF-type pair of AT-3031s (capsules at 90 degrees
>and 5.5 inches apart). The other was a pair of Shure WL-183s mounted
>approximately as shown in the photos linked above.
>
>Here are a couple short excerpts. The first is a 1:34 segment of
>evening neighborhood buzz, with the country band playing in the
>distance. First, the 3031s, then the same segment recorded with the 183
>rig. No processing except for some rough level matching...
>
>128 kbps MP3 (2.8 MB):
>
>http://www.trackseventeen.com/media/tsp/060611a-3031_183.mp3
>
>16/44.1 WAV (31.6 MB):
>
>http://www.trackseventeen.com/media/tsp/060611a-3031_183.wav
>
>The second clip is a 1:06 segment from the fireworks. Again, the 3031s
>first, followed by the 183s, with 6 seconds of blank between...
>
>128 kbps MP3 (2.1 MB):
>
>http://www.trackseventeen.com/media/tsp/060611b-3031_183.mp3
>
>16/44.1 WAV (23.2 MB):
>
>http://www.trackseventeen.com/media/tsp/060611b-3031_183.wav
>
>I hear some interesting differences between the two arrays.
>
>I agree with Walt that there's no way we can come up with definitive
>recommendations here. But I always find it helpful to hear other
>people's recordings, especially when it's accompanied by info about the
>mics and patterns used.
>
>Curt Olson
>
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