Would something like this work?
http://www.uwm.edu/~type/Mic%20Preamps/7560EQWinterValleyPres.wav
(4.6mb)
Minimal presence of a rural valley night equalized for low frequency
local "air." Car door slam @1000' feet on other side of hill for
reference. Made with 183's/MD. Rob D.
>From: Lang Elliott <>
>>
>> It occurs to me that it would be extremely useful to get a totally quiet
>> ambient recording, perhaps in the far north in dead of winter, which is free
>> of animal sounds or other nature sounds, but that has a great spaciousness
>> and a solid low end that is not contaminated by rumble. One could filter out
>> the high end of the recording using a low pass set somewhere below 1 kHz.
>> Then the resulting recording could be used to mix with soundscapes where the
>> low end had to be filtered because of rumble.
>>
>> While this is cheating, to a degree, it would add back that deep
>> spaciousness that is lost when the low end is or reduced.
>
>Having wondered around and pointed the SASS/MKH-110 at things, often
>also the SASS/MKH-20 at the same things my take is the big problem with
>this idea is that what's down in that low bass in the way of natural
>sound is not at all the same everywhere. So we are going to have to
>continue to try and work around the man made noise if we are trying to
>reproduce a close resemblance of the original site.
>
>Note switching back and forth between MKH-110's and MKH-20's will make
>the MKH-20's sound like they are giving weak bass.
>
>This low frequency end supplies more than just spaciousness, it's also a
>lot of the emotional content of a place. Even the infrasound enters in,
>we feel it at frequencies well below what our ears can handle.
>
>I'll point to the magnaplans I have for speakers for this sort of thing.
>They can give the low sound you feel without making it too loud.
>Probably because of their very large flat surface area compared to a
>focused cone on a regular subwoofer. They still do not reproduce the
>sound as it was out there, but a lot closer. They won't give that
>focused thump of a subwoofer cone, but natural infrasound is not focused
>like that. The funny thing is folks tend to think that they give poor
>bass as they are so trained to the incorrect bass of cone speakers.
>
>Walt
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>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
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