Hi

dose any one know the formants vocoder algorithm ?

thanks

Hi
I have project in pd
to develop a speech analyser that outputs relevant parameters into a .pfs file that can then be played back using the formant synthesiser

it is the inverse operation of Holmes parallel formant synthesiser

can any one help me??

Hi all,
actually i am new to the pd world
I've learned the basic and i new how to create simple patch
i want to do simple patch for detecting voice and voiceless letters

I searched the net and found that there is library name ekext that contains object called voicing_detector~
how can use these library??
where i should call it??

I'll appreciate some help from u

thanks

thank you so much
the second book contains the formant vocoder

thank you for your replay
but, no they are not the same

The phase vocoder is similar to the channel vocoder.
However, instead of estimating the pitch, the phase vocoder estimates the phase derivative at the output of each filter.
By coding and transmitting the phase derivative, this vocoder destroys the phase information

whereas

The formant vocoder can be viewed as a type of channel vocoder that estimate the first three or four formants in a segment of speech.
It is this information plus the pitch period that is encoded and transmitted to the receiver.

thank you so much
I'll study these papers and if I have any questions I'll post them here

can some one give me the equations to compute these 12 parameters?

Thank you so much ahmad
I've followed your steps
and it works and I've manged to write the result in file

but how can I compute the 12 parameters??

-- FN low-frequency formant (fixed at 250 Hz)
-- ALF amplitude of low-frequency region
-- F1 frequency of 1st formant
-- A1 amplitude of 1st formant
-- F2 frequency of 2nd formant
-- A2 amplitude of 2nd formant
-- F3 frequency of 3rd formant
-- A3 amplitude of 3rd formant
-- AHF amplitude of 4th formant (fixed at 3500 Hz)
-- V degree of voicing
-- F0 fundamental frequency
-- MS glottal pulse mark/space ratio (fixed)

http://www.pdpatchrepo.info/hurleur/wav2pfs.pd

I just need the algorithm or some hints

The 'Holmes' parallel formant synthesiser Capable of producing speech from12 parameters (updated every 10 msecs):
-- FN low-frequency formant (fixed at 250 Hz)
-- ALF amplitude of low-frequency region
-- F1 frequency of 1st formant
-- A1 amplitude of 1st formant
-- F2 frequency of 2nd formant
-- A2 amplitude of 2nd formant
-- F3 frequency of 3rd formant
-- A3 amplitude of 3rd formant
-- AHF amplitude of 4th formant (fixed at 3500 Hz)
-- V degree of voicing
-- F0 fundamental frequency
-- MS glottal pulse mark/space ratio (fixed)

the required patch should accept wave file and produce pfs file that contains these parameters

how can I do it?

please ...........