At 6:40 PM +0000 2/22/05, Rich Peet wrote:
>--- In Rob Danielson <> wrote:
>
>> Understanding the impressions of movement you can create with your 4
>> channel system with your music compositions shoud provide some
>> valuable clues. Acoustic settings are often less dramatic and harder
>> to image with mics than what's possible with artifical panning of
>> mono elements.
>>
>> Here's one example. I made a stereo recording with 21" spaced omnis
>> of a large flock of seagulls circling above me about 10-75' feet for
>> about 3 minutes. Listening at home, I noticed that my ability to
>> track the bird motions in stereo was limited to 2, at most 3 birds at
>> a time even though 10 or more were calling in flight at any given
>> moment. My attention seemed geared to pick out only the closer moving
>> birds with the rest of the birds becoming a stationary background
>> plane in my mind. I would guess that the further away the birds, the
>> more difficult it would be to articulate their motion.
>>
>
>Having made the same recording by a different technique of the same
>flock Rob described I will add. I captured the same problem in
>binaural that Rob talks of.
>
>Herring gulls are just plain hard to capture in a stereo field. This
>is from their short duration burst of sound while in flight and their
>flight patterns are that of independent birds in different directions.=A0=
=A0=A0
>
>Other species in large flocks doing continous calls also make
>detection of movement difficult when they are not in unison movement.
>Linked is a large flock walking slowly by in all directions and its
>movement is close to impossible to hear for the same reasons. An
>easier stereo image is a large flock of different species perched or
>sitting on the ground. Also a large flock that is moving in unison so
>that they become one moving sound source is easy and sounds good.
>
>
>700kb download
>http://home.comcast.net/~richpeet/geese.mp3
>
>Rich Peet
>
Is that the pitch "smear" on the attack of their
calls thats creates the illusion of motion? I
assume the loud guy on the right is stationary
but its almost as if his calls move to the middle
a little bit every time. The pumping-hovering
bee-like cant that is phasing back and forth is a
trip! Is that a brief grouse towards the middle?
Car subwoofers?
The Herrings were a little less dense than th
eMilwaukee harbour gull encounter I was
recalling-- but your're right about the brief
call durations. Reminds me that I could also hear
the wing swoops pretty in the ones that stood
out. That sound triggers some circuits no doubt.
.
Thanks for sharing the geesers. Rob D.
=3D =3D =3D =3D
--
Rob Danielson
Film Department
University of Wisconsin-Milwaukee
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