Comments on: On the Importance Of Formants In Pitch Shifting http://www.dspdimension.com/admin/formants-pitch-shifting/ Signal Processing Tutorials & Software Wed, 09 Feb 2011 09:16:26 +0100 http://wordpress.org/?v=2.9.1 hourly 1 By: Alessandro Zupo http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-2/#comment-6219 Alessandro Zupo Mon, 24 May 2010 20:44:43 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-6219 I would like to see a electronics project thad implement a real time pitch shift...for example with dsPIC. Thanks you and very compliments for this website!! I would like to see a electronics project thad implement a real time pitch shift…for example with dsPIC.

Thanks you and very compliments for this website!!

]]> By: Roman http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-2/#comment-3676 Roman Tue, 04 Aug 2009 09:14:33 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-3676 Thank you for your great article about pitch shifting and the easy-to-understand explanation of formants. Could you point me to the good approaches to keep/move the formants during the pitch shifting? As I understand this is the important part of changing the voice gender Thank you for your great article about pitch shifting and the easy-to-understand explanation of formants. Could you point me to the good approaches to keep/move the formants during the pitch shifting? As I understand this is the important part of changing the voice gender

]]> By: Rainfly_X http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-3514 Rainfly_X Mon, 25 May 2009 17:10:33 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-3514 Taimoor, I think I can answer your question. Formant frequencies aren't dependent on the fundamental frequency (pitch) of the note, they depend on the vocal tract of the singer. So lets say you move the formants without changing the pitch. You can make the singer sound like a little girl or a Russian swimmer, but it's still the same note on a scale. That's why you don't want to move the formants when you pitch shift, because it's the note that's changing, not the vocal tract of the singer. Taimoor, I think I can answer your question. Formant frequencies aren’t dependent on the fundamental frequency (pitch) of the note, they depend on the vocal tract of the singer. So lets say you move the formants without changing the pitch. You can make the singer sound like a little girl or a Russian swimmer, but it’s still the same note on a scale. That’s why you don’t want to move the formants when you pitch shift, because it’s the note that’s changing, not the vocal tract of the singer.

]]> By: Taimoor Ahmed http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-3410 Taimoor Ahmed Fri, 08 May 2009 06:18:25 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-3410 Hello!! I would like to ask One baisc Question: If Pitch is the fundamental frequency then are the formant integral multiples of Pitch i.e the harmonics?? I mean are they on 2f,3f,4f...so on??? Hello!!
I would like to ask One baisc Question:
If Pitch is the fundamental frequency then are the formant integral multiples of Pitch i.e the harmonics?? I mean are they on 2f,3f,4f…so on???

]]> By: Bernsee http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-1972 Bernsee Sat, 08 Nov 2008 08:54:08 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-1972 No - the only explanation I have is that you must be doing something wrong, or something must be going very wrong in your script. The files clearly are different (you can verify that by listening to them). Are you sure you're using the correct files? Also, I'm not sure if ML can decode IMA compressed WAV files, so you should double check that the files are read successfully before assuming anything about the data you're analyzing. HTH --smb No – the only explanation I have is that you must be doing something wrong, or something must be going very wrong in your script. The files clearly are different (you can verify that by listening to them). Are you sure you’re using the correct files? Also, I’m not sure if ML can decode IMA compressed WAV files, so you should double check that the files are read successfully before assuming anything about the data you’re analyzing.

HTH
–smb

]]> By: Duc http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-1957 Duc Thu, 06 Nov 2008 14:13:53 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-1957 I've been testing to read and show Fourier transforms of your 3 wav files with Matlab. I use wavread, fft (size of 2048), fftshift, plot. I founds that fft of 3 sounds are exactely the same in magnitude and formant positions !!! Could you explain to me why ? I’ve been testing to read and show Fourier transforms of your 3 wav files with Matlab. I use wavread, fft (size of 2048), fftshift, plot. I founds that fft of 3 sounds are exactely the same in magnitude and formant positions !!! Could you explain to me why ?

]]> By: Bernsee http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-723 Bernsee Thu, 24 Jul 2008 05:59:12 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-723 Sorry but we cannot do custom development and porting free of charge. It shouldn't be too hard to do though, so maybe you want to give it a try and see how it goes. If you hit any major roadblocks you can get back in touch with us or the people from our forum - maybe there is someone with VB experience there who can help you out. Sorry but we cannot do custom development and porting free of charge.

It shouldn’t be too hard to do though, so maybe you want to give it a try and see how it goes. If you hit any major roadblocks you can get back in touch with us or the people from our forum – maybe there is someone with VB experience there who can help you out.

]]> By: Tien http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-719 Tien Thu, 24 Jul 2008 04:16:10 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-719 Dear Sirs, Unfortunately, that I know only VB6.0 and I do not know how to convert to VB6.0 from C. I am an amateur programmer. Could you please convert for me and send to my email: hhtien2004 [at] yahoo [dot] ca It will be very gratefull for that. Sincerely Yours, Tien Dear Sirs,

Unfortunately, that I know only VB6.0 and I do not know how to convert to VB6.0 from C. I am an amateur programmer. Could you please convert for me and send to my email: hhtien2004 [at] yahoo [dot] ca

It will be very gratefull for that.

Sincerely Yours,
Tien

]]> By: Bernsee http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-415 Bernsee Sun, 25 May 2008 19:37:54 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-415 Sure, here's an explanation: http://www.dspdimension.com/admin/pitch-shifting-using-the-ft/ but no VB code - you'd have to convert the C code to VB for that. Sure, here’s an explanation: http://www.dspdimension.com/admin/pitch-shifting-using-the-ft/
but no VB code – you’d have to convert the C code to VB for that.

]]> By: Tien http://www.dspdimension.com/admin/formants-pitch-shifting/comment-page-1/#comment-411 Tien Fri, 23 May 2008 09:06:29 +0000 http://www.dspdimension.com/2007/10/18/on-the-inportance-of-formants-in-pitch-shifting/#comment-411 Dear Sirs, I would like to change pitch of sound file. Could you help me VB6.0 source code? and explaination. Sincerely Yours, Tien (Mr.) Dear Sirs,

I would like to change pitch of sound file. Could you help me VB6.0 source code? and explaination.

Sincerely Yours,
Tien (Mr.)

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