Frequencies Extracting
Hi,
From an input audio signal, I need to extract and remove any frequency whose magnitude in amplitude or in dB is [less than or equal to] a pre-defined value (a variable).
And I don't find where I can start from (fft ?) to perform this process.
Please, could you bring me a help?
Kindest regards,
Philippe
Quote: Philippe Gruchet wrote on Thu, 18 January 2007 06:51
----------------------------------------------------
> Hi,
>
> From an input audio signal, I need to extract and remove any frequency whose magnitude in amplitude or in dB is [less than or equal to] a pre-defined value (a variable).
> And I don't find where I can start from (fft ?) to perform this process.
>
> Please, could you bring me a help?
>
> Kindest regards,
> Philippe
----------------------------------------------------
MSP tutorial #26 has a patch called noise gate that will get you started with a spectral noise gate.
From there, you might have a look at the vectral~ object.
good luck,
mzed
Hi Michael !
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>> From an input audio signal, I need to extract and remove any
>> frequency whose magnitude in amplitude or in dB is [less than
>> or equal to] a pre-defined value (a variable).
>> And I don't find where I can start from (fft ?) to perform
>> this process.
----------------------------------------------------
> MSP tutorial #26 has a patch called noise gate that will get
> you started with a spectral noise gate.
> From there, you might have a look at the vectral~ object.
----------------------------------------------------
Yeah, noise gate + spectral == a spectral filter: bingo!!!
That's funny, I was *just* thinking:
'there's a very specific terminology about spectral processing, a terminology I don't know yet in audio DSP. I probably turned around in the MSP documentations, blah blah blah' :-)
Thank you so much!
Mille mercis!
All my kindest regards,
Philippe
PS: I emailed Tristan about the UB version of [pitch~],
and still nothing :-(
Philippe Gruchet wrote:
> Hi,
>
>> From an input audio signal, I need to extract and remove any
>> frequency whose magnitude in amplitude or in dB is [less than or
>> equal to] a pre-defined value (a variable).
> And I don't find where I can start from (fft ?) to perform this
> process.
Ah, denoising...
Use vectral~ as envelope follower for the bins, and then multiply with
the result of a simple
As starting point...
Stefan
--
Stefan Tiedje------------x-------
--_____-----------|--------------
--(_|_ ----|-----|-----()-------
-- _|_)----|-----()--------------
----------()--------www.ccmix.com
Hi Stefan !
----------------------------------------------------
>> From an input audio signal, I need to extract and remove any
>> frequency whose magnitude in amplitude or in dB is [less than
>> or equal to] a pre-defined value (a variable).
----------------------------------------------------
Stefan Tiedje wrote on Thu, 18 January 2007
> Ah, denoising...
> Use vectral~ as envelope follower for the bins, and then
> multiply with the result of a simple
> As starting point...
----------------------------------------------------
I was trying a noise-gate (the nice "florfish" by digitalfishphones) after my previous post: 'denoising', yes!
But 'inside the sound'.
I thought, a 'spectral filter' and now, a 'spectral denoiser'.
That's more than a starting point!
You bring me there the right words to better name my needs.
Thank you very much!
Philippe
did you finally do this spectral gate ?
could you share it ?
thx.
You can always use the FFTease external for this. Can't remember what
it's called but there is one that does this.
p
On 18/01/07, Philippe Gruchet wrote:
>
> Hi,
>
> >From an input audio signal, I need to extract and remove any frequency whose magnitude in amplitude or in dB is [less than or equal to] a pre-defined value (a variable).
> And I don't find where I can start from (fft ?) to perform this process.
>
> Please, could you bring me a help?
>
> Kindest regards,
> Philippe
>
Quote: elt wrote on Thu, 01 March 2007 14:48
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> did you finally do this spectral gate ?
> could you share it ?
----------------------------------------------------
Some unfinished proto. Nothing serious to share, sorry!
(More complex than I hoped for my project.)
PG
Has somebody done something about the denoising method that is suggested here ?