> Hello, Another recording, today, this time with two mkh 30/30 in Faulkne=
r array.
>
> 140525T0600Z1001FAULKNER ARRAY, 12DB GAIN, HPF 250HZ https://soundcloud.=
com/freitojos/140525t0600z1001faulkner-array-12db-gain-hpf-250hz
Jose,
This was nowhere near the clarity of your last track. The birds were not
placed clearly in the sound image and the background sounded out of phase.=
The depth which I liked before was missing.
This shows well the difference between volume difference stereo and time
difference stereo. The ideal is the two combined, but most commercial stere=
o
is mixed with pan pots as volume difference stereo.
Theoretically anything full left or full right with a mic spacing of 200mm=
and a sample rate of 48KHz is shifted by about 28 samples. However, the ear=
has to have a sharp sound edge to detect this distance and most birdsong
does not have sharp enough edges.
The loud call in the recording sounded a bit to the left, but on analysing=
it, this was because it was about 3-4 dB louder on the left track. The
Faulkner array should have had equal levels on all incoming sounds, except=
for very close ones. Possibly some interaction with a windshield or
windshield affected the levels.
Even the best mics do not have flat frequency responses off-axis, even
before being fitted into a windshield, which adds internal reflections. Any=
spaced array will also have irregular responses off axis, but the ear is
tolerant to these. Don't spend big money on frequency responses. :-)
Try a 45-45 degree array with the two fig-8 mics 170 to 200 mm apart which=
will give you both volume stereo and time difference stereo. This is the
theory with the ORTF array.
David Brinicombe
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