generate a range of frequencies (in CoolEdit pro)

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On Thu, 2 Jun 2005 23:16:12 +0300, "BobPit" <bobz2335@yahoo.gr> wrote:

>In CoolEdit pro, I go Generate->Tones and I generate a specific frequency
>(for example 500 Hz) in a sound file. How can I generate a range of
>frequencies (i.e 490 Hz - 510 Hz)?

How many do you want? You can generate one tone, then generate a
second, copy, go to the begining of the first and edit->mix paste.
Repeat for however many tones you want.
If you want "all" tones in a certain range, generate white noise
then make a bandpass filter for the range of frequencies of interest.


>Bob
>
>

-----
http://mindspring.com/~benbradley

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"BobPit" <bobz2335@yahoo.gr> wrote in message
news:1117743376.693160@athnrd02...
> In CoolEdit pro, I go Generate->Tones and I generate a specific frequency
> (for example 500 Hz) in a sound file. How can I generate a range of
> frequencies (i.e 490 Hz - 510 Hz)?



That window you mention has two tabs ( switch off lock to these tones.)
The left one is for the start tone and the right one is for the end tone.
There are a
couple of sweep options available once these had been activated. I used it
to
create a few basic sweep from 20-20K.

I've also created a VERY slow sweep tone from 50-10K over 10 minutes that I
power
a room to look for noisy roof tiles and other noisy room aliens. Given a
decent setup
time I alway try to hit a room with this sweep at as loud a setting as I can
get away
with. If anything rattles I try to fix it if possible.

Rv!

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Oh, no. I do not want a sweep tone. I do not want to start as 490 Hz and
finish as 510 Hz.

I want to generate and store on the mp3, as many frequencies as possible,
from 490 to 510 Hz. All of them sounding at the same time. Can this be
done?

Bob



"Rv!" <Rv@no.way.invalid> wrote in message
news7pg8v$t0e$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
>
>
> "BobPit" <bobz2335@yahoo.gr> wrote in message
> news:1117743376.693160@athnrd02...
>> In CoolEdit pro, I go Generate->Tones and I generate a specific frequency
>> (for example 500 Hz) in a sound file. How can I generate a range of
>> frequencies (i.e 490 Hz - 510 Hz)?
>
>
>
> That window you mention has two tabs ( switch off lock to these tones.)
> The left one is for the start tone and the right one is for the end tone.
> There are a
> couple of sweep options available once these had been activated. I used it
> to
> create a few basic sweep from 20-20K.
>
> I've also created a VERY slow sweep tone from 50-10K over 10 minutes that
> I power
> a room to look for noisy roof tiles and other noisy room aliens. Given a
> decent setup
> time I alway try to hit a room with this sweep at as loud a setting as I
> can get away
> with. If anything rattles I try to fix it if possible.
>
> Rv!
>

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"BobPit" wrote ...
> Oh, no. I do not want a sweep tone. I do not want to start as
> 490 Hz and finish as 510 Hz.
>
> I want to generate and store on the mp3, as many frequencies
> as possible, from 490 to 510 Hz. All of them sounding at the
> same time. Can this be done?

http://www.rcrowley.com/490-510.mp3

White noise filtered to 490-510 Hz.

It is "all" the frequencies from 490 to 510 Hz sounding together.

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"Rv!" wrote ...
> What a wierd noise that makes.
> I needed to use a very high order (50+) of filter
> in cool edits Scientific section to get that.
> Also needed compressed and normalised
> to get a useful output.

We still have no real idea what the OP has in mind.
I wonder if it sounds like he thought it would.

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Richard

Thank you for the mp3 file. I need to know how to create it by myself.
Because I want to experiment with many different frequencies (for example
300-340 HZ). Can you please tell me the steps in CoolEdit pro?

>>>
It is "all" the frequencies from 490 to 510 Hz sounding together.
<<<
Well, there are infinite frequencies between 490 and 510, or am I wrong?
Maybe you mean you included all frequencies from 490 to 510, in steps of 1.0
or 0.5 or 0.1 or 0.01 Hz steps?

Bob





"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:11a4nurglarpe85@corp.supernews.com...
>
> "BobPit" wrote ...
>> Oh, no. I do not want a sweep tone. I do not want to start as 490 Hz
>> and finish as 510 Hz.
>>
>> I want to generate and store on the mp3, as many frequencies as possible,
>> from 490 to 510 Hz. All of them sounding at the same time. Can this be
>> done?
>
> http://www.rcrowley.com/490-510.mp3
>
> White noise filtered to 490-510 Hz.
>
> It is "all" the frequencies from 490 to 510 Hz sounding together.

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Rv! <Rv@no.way.invalid> wrote:
>What a wierd noise that makes.
>I needed to use a very high order (50+) of filter
>in cool edits Scientific section to get that.
>Also needed compressed and normalised
>to get a useful output.

Right. It's basically a difficult thing to generate, and it's not really
very useful.

For things like speaker testing where you want to have a wide variety of
different frequencies in one tone to find narrow resonances, most folks
just use sweep or warble tones. Much, much easier to generate.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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In article <1117967531.233945@athnrd02>, BobPit <bobz2335@yahoo.gr> wrote:
>>>> Take white noise. Apply a brickwall filter.
>
>I promise to search and find out what "white noise" and "brickwall filter"
>are. But could you please tell me the steps in CoolEdit Pro, how to do it?

I have no idea, I have never seen CoolEdit Pro.

But there should be a function that generates white noise, and there should
also be a function that allows you to create very sharp slope filters, so
you can remove all frequencies from the noise except the range you want.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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In article <1117934810.577237@athnrd02> bobz2335@yahoo.gr writes:

> I want to generate and store on the mp3, as many frequencies as possible,
> from 490 to 510 Hz. All of them sounding at the same time. Can this be
> done?

It sounds like what you're looking for (and heaven knows why - why
don't you tell us?) is brick-wall bandwidth-limited either white or
pink noise.

You realize that there are an infinite number of frequencies between
490 and 510 Hz (and the same number between 20 Hz and 20 kHz) so the
best way to assure that you get them all is to take randomly selected
frequencies, and let it go long enough so that you're satisfied that
you have enough of them.



--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

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Thank you Richard. I did follow your instructions. Of course I do not know
if the result is what I am looking, for, I will have to trust your
instructions.

>>>>
3. Effects : Filters : Scientific Filters :
Gain=18
<<<<
You mean the Master Gain Left/Right, correct?

>>>>>
There may be different paramaters that would yield better results for your
particular application if only we knew what it was.
<<<<<
Well, I have just posted at another post the reason. Let me repeat it here
though, in case it helps you give me better parameters:

++++++++++++++++++++++
I am into essoteric stuff. I am doing chakra exercises.

For example 320 Hz is supposed to be the frequency that stimulates the Solar
Plexus Chakra.

(Have a look at the page : http://www.lunarsight.com/freq.htm )

Now, according to another theory, these frequencies are not the same to
everybody. For example other people may have 315 Hz or 322 Hz etc for their
solar plexus. A good way to stimulate it (through sound) is to play the
person's exact frequency.

Now, either I have to experiment and find my special frequencies for all my
chakra, or take the easy way. Why not create a sound file that has all/many
frequencies 300 Hz - 340 Hz? Then most probably I will include my special
frequency for the solar plexus.
++++++++++++++++++++++

Thanks
Bob

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>>>>
This sounds like an application for a sweep or a warble tone to me, all
right.
<<<<
I do not know what "warble" is, but "sweep" seems wrong to me.

Suppose my special solar frequency is 315 Hz (but I do not know this). I
want 315 Hz to sound all the time (among the other frequencies). The sweep
will make the 315 Hz sound only every 1 or 10 or 25 seconds. Correct? I do
not want this.

Bob

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In article <1118005679.736523@athnrd02>, BobPit <bobz2335@yahoo.gr> wrote:
>>>>>
>This sounds like an application for a sweep or a warble tone to me, all
>right.
><<<<
>I do not know what "warble" is, but "sweep" seems wrong to me.
>
>Suppose my special solar frequency is 315 Hz (but I do not know this). I
>want 315 Hz to sound all the time (among the other frequencies). The sweep
>will make the 315 Hz sound only every 1 or 10 or 25 seconds. Correct? I do
>not want this.

Right, but if you use white noise filtered down to a narrow band, it will
make any given frequency only once in a great long while. After all, there
are an infinite number of possible frequencies between 310 and 320 Hz, so
if you need to have an _absolutely precise_ frequency from a noise source
you will have to wait an infinite amount of time to be sure you have got it.
With a swept tone, you know you have got it at least once.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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Joe Kesselman wrote:

> Seems to me that if you accept the assumption that certain frequencies
> have positive effects on the body, you have to also ask whether any
> frequencies or combination of frequencies in that range might have
> _negative_ effects...
>
> So I'd say you really want to give people a tunable oscillator and let
> them figure out what feels right to them.
>
> (I don't buy the premise, but if we take it seriously we have to think
> about what else it implies.)

I would also question whether such a combination
of frequencies will occur in nature, or if a band
limited range of noise will occur ...
And if so, would the noise range have anywhere
near the same effect as the pure (unknown) tone -
probably not.
If such an effect is indeed possible (quantum leap
of assumption) I would expect the noise to be ineffectual
and that the pure tone would need to be determined,
and used.

good luck (I think)
rd

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"BobPit" wrote...
> Richard
>
> I did a frequency analysis of the file I created with your
> instructions. It seems that all frequencies are included from 0 Hz to
> very high, like 10.000 Hz. With more volume around the 300 Hz.
>
> If I interpret this correctly, this is not what I want. Then again I
> know very little from sound and all the feature of CoolEdit Pro.

It is a compromise. what you are asking for literally is impossible.
You are likely getting all those other frequencies because in the real
world the sound has to start and stop, and there are likely other
factors as well. That is why I said that there may be different
parameters that would get you closer to what you want.

Assuming that your magic frequency theory is correct (which I am
not prepared to buy into), "cheating" by generating all the possible
frequencies "at once" seems like a dubious method. It may even have
negative side effects that completely mask any positive effect from
the (unknown) "magic frequency".

I'm pretty dubious that you can do what you are asking. If you could,
people would be doing it already. You will likely need to study
about sound more and do a bunch more experiments.

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Maybe a good compromise would be to generate white music and really filter
it within 300-340 Hz. I mean I do not want to see anything below 300 or
above 340 Hz.

Your initial instructions were supposed to do this. But the frequency
analysis showed different results. I do not understand. CoolEdit canot do
this? What would be the parameters for this?

Bob

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In article <1118002248.506188@athnrd02> bobz2335@yahoo.gr writes:

> Now, either I have to experiment and find my special frequencies for all my
> chakra, or take the easy way. Why not create a sound file that has all/many
> frequencies 300 Hz - 340 Hz? Then most probably I will include my special
> frequency for the solar plexus.

This stuff isn't supposed to be easy, is it? Do you know when you've
found your frequency? Does your solar plexus do something that you can
detect? If so, just sweep over the range, and when you feel it
happening, stop there.

How hard can that be?

--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

Archived from groups: rec.audio.pro (More info?)

Rv! wrote:
> What a wierd noise that makes.
> I needed to use a very high order (50+) of filter
> in cool edits Scientific section to get that.
> Also needed compressed and normalised
> to get a useful output.

Use a FFT filter with the maximum number of points (I think
its about 24,000).

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In article <1118043382.759431@athnrd02>, BobPit <bobz2335@yahoo.gr> wrote:
>I looked again at the frequency analysis.
>
>It is not that bad. The file (490-510.mp3) seems to make a peak from 440 Hz
>to 560 Hz (> -72 db). The other frequencies are almost below -100 db.
>
>How can we make that peak even sharper?

By running it through the filter again.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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Arny Krueger wrote:
> Rv! wrote:
>
>>What a wierd noise that makes.
>>I needed to use a very high order (50+) of filter
>>in cool edits Scientific section to get that.
>>Also needed compressed and normalised
>>to get a useful output.
>
>
> Use a FFT filter with the maximum number of points (I think
> its about 24,000).

I think what he would really like is the IFFT of a really
long frequency domain function with only the frequencies in
his band having magnitude one and the rest zero. A zero
phase at all frequencies would work. Loop on the result of
that IFFT and you will hear the sum of all the discrete
frequencies in the band that have an integral number of
cycles in the length of the sequence. It will probably
undulate.

Alas you need something like Matlab to do that rather than
Audition.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein