Hi, Pd people!

I want to overlap an audio signal with a sound generated by five formants. These formants will be generated by a bank of filtered white noise. The filters I will use for this purpose will be bandpass filters, which need the frequency and Q parameters of the original signal to create a smooth overlap.

with fiddle ~ I can get the frequency and decibels of each of the formants, but how I can get the bandwidth?

I appreciate any advice.

Thanks.

Maybe you need a formant vocoder. Some time ago there was a question about that on this forum:

http://puredata.hurleur.com/sujet-3705-formant-vocoder-algorithm

Katja

Found an IEEE article on the topic (cool, normally IEEE charges some $30 for such articles):

http://www.ee.columbia.edu/~dpwe/papers/SnelM93-fmnt.pdf

It is about Linear Predictive Coding. Is there a Pd object doing LPC? Yes, there is! [lpc~] by Nicolas Chetry & Edward Kelly, in the ekext library. No help file. Found a demo patch lpc-cross-synthesis.pd but possibly it is not in Pd extended distribution. If you need it, I'll upload it here.

Katja

@katjav said:

Found an IEEE article on the topic (cool, normally IEEE charges some $30 for such articles):

http://www.ee.columbia.edu/~dpwe/papers/SnelM93-fmnt.pdf

It is about Linear Predictive Coding. Is there a Pd object doing LPC? Yes, there is! [lpc~] by Nicolas Chetry & Edward Kelly, in the ekext library. No help file. Found a demo patch lpc-cross-synthesis.pd but possibly it is not in Pd extended distribution. If you need it, I'll upload it here.

Katja

Hi Katjav! Yes, please would you post the file for us? Thank you so much!