PSN-L Email List Message
Subject: Re: Digest from 07/09/2007 00:00:06
From: "Randy" rpratt@.............
Date: Tue, 10 Jul 2007 12:15:53 -0500
Hi,
A couple of years ago one of the PSN members offered a program called
'RECENT' that created filtered displays and helicorder type output in HTML
format. A side function was to create a sound file from the event with
control of playback rate. It worked quite well. I don't know if it is
available somewhere but if not I think I could find a copy somewhere in my
files. The program operates in a batch mode and is quite easy to use.
Randy
----- Original Message -----
From:
To:
Sent: Tuesday, July 10, 2007 02:01
Subject: Digest from 07/09/2007 00:00:06
>
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 1 |
> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------'
> Subject: Re: FFT Waterfall Display
> From: "Michael Kimzey"
> Date: Mon, 09 Jul 2007 08:23:35 -0400
>
>
> >The Cornell Lab of Ornithology offers a free program for displaying
> >waterfall spectrograms of WAVE format sound files, which although
intended
> >primarily
> >for the study of bird songs, would be useful for earthquakes as well.
All
> >you
> >have to do is convert your event files to 16-bit monaural WAVE format
and
> >use Cornell's "Raven Lite 1.0" application. It is free, and can display
> >spectrograms in color or black-and-white. See:
> >
> > _http://www.birds.cornell.edu/brp/raven/Raven.html_
> >(http://www.birds.cornell.edu/brp/raven/Raven.html)
> >
>
> Ok, so that begs the question, how do we convert an event to a 16 bit wave
> file? Actually, this is a question that has more implications, as some
> gentleman actually took USGS data and did convert it to a wave file, then
> sped it up and is using it as an art exhibit. See:
> http://www.jtbullitt.com/index.html
> So, if anyone knows how to convert events, or even WinSDR data to a "wave"
> file, it can be sped up and I think that one day's worth was approximately
4
> minutes of sound.
> Interesting.
>
> - Mike
>
>
>
>
> .------ ------ ------ ------ ------ ------ ------ ------ ------ ------.
> | Message 2 |
> '------ ------ ------ ------ ------ ------ ------ ------ ------ ------'
> Subject: Re: FFT Waterfall Display
> From: Bobhelenmcclure@.......
> Date: Mon, 9 Jul 2007 22:48:01 EDT
>
>
> -------------------------------1184035681
> Content-Type: text/plain; charset="US-ASCII"
> Content-Transfer-Encoding: 7bit
>
> The WAVE format is described at:
>
> _http://www.borg.com/~jglatt/tech/wave.htm_
> (http://www.borg.com/~jglatt/tech/wave.htm)
>
> The header data is 44 bytes long, and the remainder of the file
> consists usually of 16-bit data samples.
> __________________________
> | RIFF WAVE Chunk |
> | groupID = 'RIFF' |
> | riffType = 'WAVE' |
> | __________________ |
> | | Format Chunk | |
> | | ckID = 'fmt ' | |
> | |__________________| |
> | __________________ |
> | | Sound Data Chunk | |
> | | ckID = 'data' | |
> | |__________________| |
> |__________________________|
>
> The PSN TYPE 4 file format is described at:
>
> _http://www.seismicnet.com/psnformat4.html_
> (http://www.seismicnet.com/psnformat4.html)
>
> If you know how to program in QuickBasic, Visual Basic, or C the above
> documents provide enough information for writing an application to
convert PSN
> files to WAVE format. I could easily add this function to my
WQFilter.exe
> utility, but don't presently have the ambition to do so. Sorry about
that.
>
> Bob
>
>
>
> ************************************** See what's free at
http://www.aol.com.
>
> -------------------------------1184035681
> Content-Type: text/html; charset="US-ASCII"
> Content-Transfer-Encoding: quoted-printable
>
>
>
>
>
> Arial"=20
> bottomMargin=3D7 leftMargin=3D7 topMargin=3D7 rightMargin=3D7> e_document=20
> face=3DArial color=3D#000000 size=3D2>
> The WAVE format is described=20
> at:
>
> href=3D"http://www.borg.com/~jglatt/tech/wave.htm"> face=3D"Courier
New">http://www.borg.com/~jglatt/tech/wave.htm IV>
>
>
The header data is 44 bytes long, and
the=20
> remainder of the file
consists usually of 16-bit data samples.=20
>
__________________________
| RIFF WAVE=20
> Chunk
|
| =20
> groupID =3D 'RIFF' |
|
ri=
> ffType=20
> =3D 'WAVE' |
| =20
> __________________ |
| | Format=20
> Chunk | |
|
| ckID=20=
> =3D=20
> 'fmt ' | |
| =20
> |__________________| |
| =20
> __________________ |
| | Sound Data
Chunk=20
> | |
| | ckID =3D 'data' =20
> | |
| |__________________| =20
> |
|__________________________|
>
>
The PSN TYPE 4 file format is
describ=
> ed=20
> at:
>
>
href=3D"http://www.seismicnet.com/psnformat4.html"> face=3D"Courier
New">http://www.seismicnet.com/psnformat4.html IV>
>
>
If you know how to program in
QuickBa=
> sic,=20
> Visual Basic, or C the above documents provide enough information for
writin=
> g an=20
> application to convert PSN files to WAVE format. I could easily add
th=
> is=20
> function to my WQFilter.exe utility, but don't presently have the ambition
t=
> o do=20
> so. Sorry about that.
>
>
Bob
>
> -------------------------------1184035681--
>
>
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