what is the way to convert a signal into numbers.

adc~
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FFT~
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atan

After FFT~, I want to do (atan) of ratio of imaginary and real parts to calculate the phase. but imaginary and real parts are in signal from. Is there any way that i convert this signal into a number and then pass to atan (as atan demands a number input not a signal input).

or is there any variant of atan, who take signal input.

The formula to calculate the phase is

PHASE=atan(imaginary/real).

or is there any pd object that calculates the phase directly

thanks.

There is a signal domain [atan~] unit. Can't remember what library it's in though, have a search for it.

In Max/MSP, there are objects cartopol~ (cartesian to polar) and poltocar~
(polar to cartesian). The first object take imaginary and real parts of
FFT and give its polar values (amplitude and phase), whereas the second
object takes amplitude and phase , and convert it back to real and
imaginary. for details see
"http://www.cycling74.com/story/2006/11/2/113327/823".

I searched these objects in pd, there is one object
named cpole~, but this object does not clearly states that it produces
amplitude and phase, as MAx/MSP object says.
and also pd does not have inverse of (polar to cartesian).

so any idea, of these two MAX/MSP objects in pure data.

>>There is a signal domain [atan~] unit. Can't remember what library it's in though, >>have a search for it.
thanks. I try to search it.

hi, i am working on a reactable project and i need to learn more about cartopol object. i would to convert the cartesian coordonates of a symbol captured with the camera to polar coordonates in OPEN GL.
I open cartopol but doesn't understand how to use it in PD.
Thanks for your help.

[cartopol~] and [poltocar~] are both in the cyclone library. In fact, you'll find most Max/MSP objects in cyclone (cy[cling74]clone, get it? Eh? Eh!?)

Ahmad, I have the same exact problem. I am working in a patch that runs a FFT calculation and outputs signal:

SIGNAL FROM FILE~
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FFT~
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anything that converts it to a list
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unpack
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the rest of mu patch

However, I need to convert this signal output to a list of float numbers, so I will be able to read these numbers as input to the next step of the whole patch. Now, I am stuck in PD trying to do this conversion. Does anyone know how to solve it??
Thanks a lot!!

[zexy/pack~] will convert a block of audio to a list. Otherwise, you could just write the audio to a table and read it from there.