Here is one of the most revealing tests that I know:
Headphones required.
http://klas.telinga.com/demo/walkinginacircle.mp3
Klas
At 11:25 2013-08-04, you wrote:
>Any stereo array can easily be tested for efficacy by the simple
>expedient of (while recording) walking across the soundfield in an
>arc equidistant from the mic array. If the spatial representation is
>accurate as captured, when the recording is played back over
>properly positioned loudspeakers (=B130=BA for conventional stereo; =B145=
=BA
>for X-Y Blumlein crossed figure-of-eight) the footsteps should
>progress evenly from one side to the other. You could be forgiven
>for thinking this would be the result in most cases, but in fact it
>seems to work only with crossed figure of eights and M-S arrays,
>both coincident. All spaced arrays produce extremely aberrant
>results with this experiment.
>For most nature sound recordings I don't think it matters much -
>especially of animal sounds - but to me it does matter when I am
>trying to capture what might be called an acoustic, such as a stream
>or a beachfront with waves (to realistically capture the movement of
>the breaking part of the wave).
>
>------------------------------------
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
>Yahoo! Groups Links
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
website: www.telinga.com
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