Thanks, John -- I'll try the white noise test as soon as I get a chance
(probably not 'til next week). It would be interesting to get some idea of
the consistency between recorders. -- David
At 11:09 PM 8/1/2005, you wrote:
>Hi David,
>First to make things clear: I don't consider myself in any way a
>technical expert on audio recording.
>That being said, I did a little test recently where I played some
>white noise through a speaker and recorded it with my PMD670 set at
>different levels. I then opened the resulting waveform in Audacity and
>paid attention to the levels while playing it back. From what I could
>tell, the gain increase is fairly linear between 1 and 8. Somewhere
>between 8 and 9 it pretty much maxes out. I also notice that below 1,
>one channel cuts out completely around 0.5.
>For most of my recording earlier this spring, I electrical-taped the
>dial at 6: it seemed a happy medium. But I'm not sure what's actually
>best for sound quality.
>-John Hartog
>
>
>--- In David Martin
><> wrote:
> > John -- I found it interesting you were using level settings from 7-10
> > with the PMD670. I don't have much additional gain at settings over
>7 with
> > my PMD670, and I was wondering how much gain you get in the 7-10
> > region. Although I don't often have a quiet enough background to
>worry
> > about electronic noise, I rarely record with the level setting over
>5 or
> > maybe 6, because I have heard what I think is self noise of some
>kind at
> > higher level settings. (I'm using MKH series mics). I don't have
>enough
> > experience to know what the source is, and I have never tried to
>analyze
> > the problem. Just used my ears.
> >
> > -- David
> >
> > At 07:08 PM 7/31/2005, you wrote:
> > >Last weekend I returned to the Aldrich Mountains: this time we stayed
> > >at Deer Creek Guard Station. One nice thing about this forest service
> > >cabin (and also the one at Murderers Creek) is no electricity. The
> > >lights, refrigerator, and stove run on propane, which does make some
> > >noise but nothing like the annoying hums and buzzes that come from
> > >electrical devices.
> > >
> > >Just after dark I went out on a walk listening for owl sounds, but I
> > >didn't hear any. A little later as the nearly full moon rose from the
> > >trees and illumined the meadow, a coyote began beckoning others to
> > >join in chorus. In this recording there are two coyotes, some
> > >crickets, and a mystery bird - any takers? (1.6MB) (PMD670 full gain,
> > >NT1-As at 60deg and with barrier):
> > >
> > >http://www.rockscallop.org/ear/jh-050722-nightcoyote.mp3
> > >
> > >For Rob Danielson's comparisons of recorders and microphones, he
> > >requested examples recorded at full gain. For the PMD-670, the maximum
> > >gain is an unimpressive 45dB. Here's a 30 sec example at dawn at full
> > >gain.
> > >
> > >http://www.rockscallop.org/ear/jh-050723-0424_rl10-60dg-b1.mp3
> > >
> > >Here's another short example with the levels set at 7 out of 10.
> > >
> > >http://www.rockscallop.org/ear/jh-050723-0521_rl07-60dg-b1.mp3
> > >
> > >Here's another example (PMD670 set at 7) of coyotes joining in chorus
> > >around 5:30 am.
> > >
> > >http://www.rockscallop.org/ear/jh-050723-0526_coyotechorus.mp3
> > >
> > >Any comments, questions, or suggestions are welcomed.
> > >-John Hartog
> > >
> > >
> > >
> > >
> > >
> > >
> > >"Microphones are not ears,
> > >Loudspeakers are not birds,
> > >A listening room is not nature."
> > >Klas Strandberg
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
________________________________________________________________________
________________________________________________________________________
|