Hi Ed,
Ok, so now that I know I can import WAV files into Matlab (which I
did), I'm having trouble figuring out what the 2 columns of data are.
Are they both amplitude, 1 column for each headphone (L and R)? I
think so.
If so, then is there any 'right' way to combine them to get the TOTAL
signal?
Also, in Audacity, is there a way that I can't find that will allow me
to save the Spectrum as a file, instead of saving the amplitude data
like the WAV does? or do I have to save WAV and then FFT to get
spectrum file myself in Matlab?
Thanks, Natalie :)
--- In Ed Anson <> wrote:
> Tim made some good suggestions. Raven is a high end (i.e., expensive)
> program but it could be what you need. Like Audacity, you can download
> it for free, but unlike Audacity all you get is a trial program that is
> partially crippled until you pay for it. But (depending on your needs)
> Audacity might do the job for free.
>
> When testing your stereo recording, the most important thing is to be
> sure you hear yourself in the right location. That is, be sure the
> stereo imaging is correct. It's very easy to get the figure 8 mic
> rotated wrong so that the stereo image is reversed or even worse.
>
> But it's also important that the sound is properly balanced. As Tim
> mentioned, the gain range could be an issue. You might also want to run
> the Balance Calibration menu item (#75). This helps make sure that the
> 12 o'clock position on the bottom knob really sets the proper balance
> between the channels. If it is not balanced properly, you could get
> uneven results.
>
> You might want to consider whether this group might want to hear some
> of your recordings. Even though they will be primarily for scientific
> research, portions may still have broader appeal. Who knows? Some of us
> might even be interested in your research! What are you up to, anyway?
>
>
> On Oct 1, 2005, at 9:33 PM, nbioacoustics wrote:
>
> > Thanks Ed. Great! I'll try that, thanks Ed. I feel bad because I feel
> > like I'm sucking information out of you guys and not giving any, but
> > I'm so new to this that I have nothing to contribute yet...I hope to
> > one day!
> >
> > Another question: when I listen to a recording of myself walking
> > around my mics (a cardioid piggbacked on top of a figure 8), I notice
> > that my humming is louder when I'm on the sides than when i'm
directly
> > in front of the mics (even distance in all locations), which makes me
> > wonder if there's something unequal about my mics... They are
lined up
> > with the capsules equal. One is a MKH 30 and the other a 40. Any idea
> > of why this might be?
> >
> > --- In Ed Anson <>
> > wrote:
> > > What you want is a spectrograph. There are several products
> > available
> > > than can provide that for you. They vary widely in quality and
> > cost. I
> > > would suggest you try two things:
> > > 1. Check out Audacity. It is a free downloadable editor that can
> > > produce a spectrogram.
> > > 2. If that doesn't meet your needs, just Google spectrograph
and you
> > > will find a number of alternatives.
> > >
> > >
> > > On Oct 1, 2005, at 9:16 PM, nbioacoustics wrote:
> > >
> > > > So now that I can record from MS to stereo, how can I look at my
> > > > 'data' as a graph showing Frequency as a function of Time?
> > > >
> > > >
> > > >
> > > >
> > > > "Microphones are not ears,
> > > > Loudspeakers are not birds,
> > > > A listening room is not nature."
> > > > Klas Strandberg
> > > >
> > > >
> > > >
> > > > SPONSORED LINKS
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> >
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> > "Microphones are not ears,
> > Loudspeakers are not birds,
> > A listening room is not nature."
> > Klas Strandberg
> >
> >
> >
> > SPONSORED LINKS
> > Science kits
> > Science education
> > Science kit for kid
> > Natural sound
> > Recording technique
> > My first science kit
> >
> > YAHOO! GROUPS LINKS
> >
> > =E2=96=AA Visit your group "naturerecordists" on the web.
> >=20
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