hi john,<div><br></div><div>i don't have a zoom h4, but i had a marantz pmd660 with which i used a compact flash midi drive that caused a high pitched whine. see if you still get the sound with a plain compact flash. the mini drives have more memory, but as far as i have heard, have the tiny whine of a tiny drive.<div>
<br></div><div>i hope this perhaps helps.</div><div><br></div><div>best,</div><div>john</div><div><br><div class="gmail_quote">On Sun, Apr 5, 2009 at 9:58 PM, John Hopkins <span dir="ltr"><<a href="mailto:jhopkins@tech-no-mad.net">jhopkins@tech-no-mad.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hey folks -- I've been using a zoom H4 for a couple years now, and have<br>
been suspicious how a non-mechanical recording device -- in a really<br>
quiet place (for example the Sonoran desert of western Arizona) -- and<br>
the wave form of a short recording of a passel of birds in a mesquite<br>
tree at dusk shows a cyclic 3-sec repeating pattern which seems to be<br>
very low frequency something (sorry, don't have a spectral freq analyzer<br>
on my machine). I uploaded a screen shot of the waveform and a wav copy<br>
of the file -- any feedback? Has anyone else experienced this with the<br>
H4? I've seen it before on the files when recording in really quiet<br>
places, and of course I suppose the best solution is probably a few<br>
thousands spent in better field recording equipment, to be sure, but...<br>
what could be the cause? In this instance I was not hand holding<br>
it, it was on the ground in a stable place, and essentially no wind.<br>
There is also a higher-pitched whine as well, faugh!<br>
<br>
the sound file: <a href="http://neoscenes.net/09-03-092_birds.wav" target="_blank">http://neoscenes.net/09-03-092_birds.wav</a> and a screen<br>
shot of the file in Peak showing the approximately 3-second repeating<br>
patterns <a href="http://neoscenes.net/09-03-092_birds.jpg" target="_blank">http://neoscenes.net/09-03-092_birds.jpg</a><br>
<br>
cheers,<br>
John<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><a href="http://www.johnhudak.net">http://www.johnhudak.net</a><br>
</div></div>