Rob, thanks for the analysis:
At Wed, 2 Jul 2008 13:18:35 -0500, Rob Danielson wrote:
> Great example of the virtues of the recorder and event, Greg!
>
> I believe the background at the beginning of the recording is quiet
> enough to reveal a good deal of the character of the self-noise and
> color of the built-in mics. As with Vicki's test, the low frequencies
> are attenuated and there seems to be a lower-mid-range boost. The
> mics' self-noise is "warm" - spreading under 3K. There seems to be a
> bit more audible noise in the right mic and (understandably) LF
> handling noise throughout.
>
> Of general interest, Vicki has demonstrated that one can
> significantly improve the noise performance, stereo imaging and
> probably the handling noise with Shure WL183 mics ($170 USD) and most
> likely, Klas's EM-21's or EM-23's.
>
> There seems to be a bit more echo coming from the right and from the
> deep center. Do you happen to recall if that is consistent with the
> setting? Rob D.
Yes. I was facing a valley. Uphill narrowed quickly on my left and
wound around behind me a bit, with low hills on the other side.
Downhill spread out on my right, with rice paddies about 100 meters
below and a higher mountain either in front or just a little to my
right. Behind me and a little to my right the hill behind the road
was pretty close, and it leveled out to the left (up). Right in
front was a very low hill (1.5-2 meters), and the bird was in a tree
there, about 15-20 meters from me.
Later I realized that I should have taken a few photos of the scene,
but I was too exhausted from cycling to think clearly.
I'd like to try WL183s, too. I made a pair, following your
instructions, and they seem to be a little quieter.
Thanks again.
- Greg
> At 1:02 AM +0900 7/3/08, Greg Peterson wrote:
> >Here is a 3-minute recording of a Japanese bush warbler (uguisu):
> >
> ><http://www.notredame.ac.jp/~peterson/audio/nature/20080608/20080608-kon=
ze1.mp3>http://www.notredame.ac.jp/~peterson/audio/nature/20080608/20080608=
-konze1.mp3
> >
> >On June 8th I took a bicycle ride up in the hills near my home in
> >Shiga Prefecture, Japan. I took an Olympus LS-10 in my saddlebag.
> >As I was struggling up a steep mountain road at about 4 p.m., I
> >heard this caller, got off my bike, grabbed the LS-10, and started
> >recording immediately. Wind screens were attached, and settings were
> >24-bit, 44.1KHz, mic sense high, record level 7, limiter ON. I had
> >no idea how high to set the input level. It peaked between -7dB and
> >-6dB, so I could have set it lower with no limiter.
Greg Peterson <>
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