Tide table audiograph

Stumpy
Guest

Sat Jan 07, 2012 4:07 pm

I was looking at a tide table to find minus tides during the daytime to go
poke at creatures and I thought that the fairly regular wavelength would
make some very boring music. If you sped up the frequency from days to kHz
and had feet represent either volts delivered to a speaker, or actual sound
waves you would hear something. Probably a very regular tone that varied
more in volume than anything else, but you could always process the signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

http://www.sengpielaudio.com/calculator-wavelength.htm

Jasen Betts
Guest

Sat Jan 07, 2012 8:28 pm

On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:

Quote:

I was looking at a tide table to find minus tides during the daytime to go
poke at creatures and I thought that the fairly regular wavelength would
make some very boring music. If you sped up the frequency from days to kHz
and had feet represent either volts delivered to a speaker, or actual sound
waves you would hear something. Probably a very regular tone that varied
more in volume than anything else, but you could always process the signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news_at_netfront.net ---

Stumpy
Guest

Sat Jan 07, 2012 9:42 pm

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...

Quote:

On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Rich Webb
Guest

Sat Jan 07, 2012 11:24 pm

On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn>
wrote:

Quote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Maybe Mr. Google can help? <clickety click> Yes!
<http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm>

--
Rich Webb Norfolk, VA

Stumpy
Guest

Sun Jan 08, 2012 2:10 am

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...

Quote:

On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Maybe Mr. Google can help? <clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

amdx
Guest

Sun Jan 08, 2012 2:27 am

On 1/7/2012 7:10 PM, Stumpy wrote:

Quote:

"Rich Webb"<bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...
On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy"<perilmung_at_spamnet.corn
wrote:

"Jasen Betts"<jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy<perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you<<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Maybe Mr. Google can help?<clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

I'm not real knowledgeable about tides, but in our local bay the dc

component changes with season and the amplitude is modulated by
prevailing winds and I assume barometric pressure. Then you can throw
in the wake of small fishing boats, large container ships and a few Navy
vessels, including hovercraft. Hey, I have a very musical area!
It seems without these other effects the tune would get repetitive.
Mikek

Rich Webb
Guest

Sun Jan 08, 2012 3:21 am

On Sat, 7 Jan 2012 17:10:57 -0800, "Stumpy" <perilmung_at_spamnet.corn>
wrote:

Quote:

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...
On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Maybe Mr. Google can help? <clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

Certainly. However, Table 17.2 has the period and amplitude of the
constituents already worked out, so it's really just a matter of summing
each over time.

If you want the actual tidal predictions for a non-ideal Earth and at a
particular real tidal station, it gets a little trickier.

--
Rich Webb Norfolk, VA

Rich Webb
Guest

Sun Jan 08, 2012 3:34 am

On Sat, 7 Jan 2012 17:10:57 -0800, "Stumpy" <perilmung_at_spamnet.corn>
wrote:

Quote:

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...
On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data to
make a 5 minute "song". I bet NOAA has data from back quite a few years.

Maybe Mr. Google can help? <clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

Aha! Take a look at
<http://www.math.sunysb.edu/~tony/tides/tidesounds.html>

--
Rich Webb Norfolk, VA

Stumpy
Guest

Sun Jan 08, 2012 4:02 am

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:etuhg7d2co9rkv49l5t7m7mv1lonmkcem4_at_4ax.com...

Quote:

On Sat, 7 Jan 2012 17:10:57 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...
On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime
to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days
to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table
data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data
to
make a 5 minute "song". I bet NOAA has data from back quite a few
years.

Maybe Mr. Google can help? <clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

Certainly. However, Table 17.2 has the period and amplitude of the
constituents already worked out, so it's really just a matter of summing
each over time.

If you want the actual tidal predictions for a non-ideal Earth and at a
particular real tidal station, it gets a little trickier.

--
Rich Webb Norfolk, VA

I can't visualize table 17.2

Also don't understand "important concepts" at the end of the chapter.

a.. Tides have six fundamental frequencies. The tide is the superposition of
hundreds of tidal constituents, each having a frequency that is the sum and
difference of five fundamental frequencies.

Reminds me of the function of a theremin which only uses 2 frequencies.
Time to give up.

Stumpy
Guest

Sun Jan 08, 2012 4:18 am

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:540ig7dg8d4ageokmtl43jea1kp0880rp2_at_4ax.com...

Quote:

On Sat, 7 Jan 2012 17:10:57 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Rich Webb" <bbew.ar_at_mapson.nozirev.ten> wrote in message
news:pfhhg7pqtlnrgeikchvl3ev4stqr5sktg8_at_4ax.com...
On Sat, 7 Jan 2012 12:42:01 -0800, "Stumpy" <perilmung_at_spamnet.corn
wrote:

"Jasen Betts" <jasen_at_xnet.co.nz> wrote in message
news:jea6c4$4sl$1_at_reversiblemaps.ath.cx...
On 2012-01-07, Stumpy <perilmung_at_spamnet.corn> wrote:
I was looking at a tide table to find minus tides during the daytime
to
go
poke at creatures and I thought that the fairly regular wavelength
would
make some very boring music. If you sped up the frequency from days
to
kHz
and had feet represent either volts delivered to a speaker, or actual
sound
waves you would hear something. Probably a very regular tone that
varied
more in volume than anything else, but you could always process the
signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table
data
and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

The graphs are jpegs, the tables too. and the tables don't have evenly
spaced samples.

It's probably easier to find the generating function and use octave or
matlab or a spreadsheet or something like that to convert that to
samples that can be converted to wav.

At ~1Khz 2012's data is going to get you <<1s of tone.

I know the data has to come from elsewhere. 2 tides a day for 365 days
would make a very short MP3 at 1kHz. It would take almost 7 years data
to
make a 5 minute "song". I bet NOAA has data from back quite a few
years.

Maybe Mr. Google can help? <clickety click> Yes!
http://oceanworld.tamu.edu/resources/ocng_textbook/chapter17/chapter17_04.htm

--
Rich Webb Norfolk, VA

Ha! If I could do math those formulas could feed an amp directly. I
wonder if Octave or Matlab mentioned above can input formula 17.16?

Aha! Take a look at
http://www.math.sunysb.edu/~tony/tides/tidesounds.html

--
Rich Webb Norfolk, VA

Holy crap - someone already did this.

Thanks much for finding such a weird audio artifact.

I can get back to whatever I was supposed to be doing.

John Larkin
Guest

Sun Jan 08, 2012 7:22 am

On Sat, 7 Jan 2012 07:07:42 -0800, "Stumpy" <perilmung_at_spamnet.corn>
wrote:

Quote:

I was looking at a tide table to find minus tides during the daytime to go
poke at creatures and I thought that the fairly regular wavelength would
make some very boring music. If you sped up the frequency from days to kHz
and had feet represent either volts delivered to a speaker, or actual sound
waves you would hear something. Probably a very regular tone that varied
more in volume than anything else, but you could always process the signal
to make it more interesting.

Would anyone have a hint for a scheme to capture online tide table data and
then a (free)program to convert it to usable audio? I know this is a
ridiculous project, but it's not a good day to go fishing.

http://www.san-diego-beaches-and-adventures.com/san-diego-tide-chart.html

http://www.sengpielaudio.com/calculator-wavelength.htm

Here's one, kind of cool:

http://www.arachnoid.com/tides/anchorageTide.mp3

John

Waz Bazbo
Guest

Fri Jan 13, 2012 9:58 pm

Quote:

Aha! Take a look at
http://www.math.sunysb.edu/~tony/tides/tidesounds.html

--
Rich Webb Norfolk, VA

Holy crap - someone already did this.

Thanks much for finding such a weird audio artifact.

I can get back to whatever I was supposed to be doing.

Ok, so this is silly as hell...

This is what it sounds like when you play the six tide-generations on
the bottom at the same time...

Fred Abse
Guest

Mon Jan 16, 2012 7:19 pm

On Fri, 13 Jan 2012 14:58:40 -0600, Waz Bazbo wrote:

Quote:

Ok, so this is silly as hell...

So is posting a binary to a non-binary newsgroup, (sci.electronics.basics).

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

Waz Bazbo
Guest

Thu Jan 19, 2012 8:19 am

In article <pan.2012.01.14.10.59.37.126292_at_invalid.invalid>, Fred Abse
<excretatauris_at_invalid.invalid> wrote:

Quote:

On Fri, 13 Jan 2012 14:58:40 -0600, Waz Bazbo wrote:

Ok, so this is silly as hell...

So is posting a binary to a non-binary newsgroup, (sci.electronics.basics).

Sorry, thought I was posting it to mp3.experimental only. Have a bran
muffin, relax, pull the stick from your ass... see? The world still
turns!

Kaz Kylheku
Guest

Thu Jan 19, 2012 6:59 pm

On 2012-01-19, Waz Bazbo <probably.not_at_my.desk> wrote:

Quote:

In article <pan.2012.01.14.10.59.37.126292_at_invalid.invalid>, Fred Abse
excretatauris_at_invalid.invalid> wrote:

On Fri, 13 Jan 2012 14:58:40 -0600, Waz Bazbo wrote:

Ok, so this is silly as hell...

So is posting a binary to a non-binary newsgroup, (sci.electronics.basics).

Sorry, thought I was posting it to mp3.experimental only. Have a bran
muffin, relax, pull the stick from your ass... see? The world still
turns!

The world also still turns after murder and genocide; so that is hardly
an applicable excuse for small transgressions. Smile