Pitch

Started by Lars Tegborg in comp.dsp14 years ago 1 reply

Hi Does anyone know how to pitch up sound to double frequency in realtime. 100Hz pitch to 200Hz and 400Hz pitch to 800Hz. Thanks

Hi Does anyone know how to pitch up sound to double frequency in realtime. 100Hz pitch to 200Hz and 400Hz pitch to 800Hz. Thanks


pitch question

Started by HyeeWang in comp.dsp8 years ago 6 replies

Here are two questions about pitch retrieval method, which puzzled me for a long time. 1. Since pitch is a kind of subjective and perceived...

Here are two questions about pitch retrieval method, which puzzled me for a long time. 1. Since pitch is a kind of subjective and perceived factor, how it can be searched by computing ? 2. Let us assume pitch can be searched by that. As we know, the pitch value of old man can be low to 55hz or so. Some well-known speech codec have a high pass filter located at the beginning of proc...


Announce: Fast real-time-stretching and resampling algorithms (Procrustes/Sylea)

Started by DSP team in comp.dsp11 years ago 17 replies

Here are some excerpts from an old comp.dsp thread article: > What I did was using the Pitch Shifter example from the page > (finetuned...

Here are some excerpts from an old comp.dsp thread article: > What I did was using the Pitch Shifter example from the page > (finetuned it/speeded it up a bit with some different FFT algorithm) > to change the pitch. Afterwards I altered the samplerate so the pitch > would be back to where it was, but now the duration has changed. Instead of shifting the pitch and resampling, you can do i


pitch prediction gain

Started by ange...@gmail.com in comp.dsp6 years ago 1 reply

Hi, I hope to pitch prediction gain between two pitch estimation algorithms. Does anyone here have a software to compute pitch prediction...

Hi, I hope to pitch prediction gain between two pitch estimation algorithms. Does anyone here have a software to compute pitch prediction gain or show me how to calculate pitch prediction gain? Thanks in advance!


Dividing speech signal to pitch-synchronous frames

Started by vjw in comp.dsp7 years ago 6 replies

Hello, For my application, I have to segment a speech waveform in to pitch-synchronous frames i.e. each frame is two pitch periods long...

Hello, For my application, I have to segment a speech waveform in to pitch-synchronous frames i.e. each frame is two pitch periods long and centered around the current pitch mark. Can anyone give me an idea how to approach this problem (using Matlab)? Thanks.


Pitch detection Algorithm

Started by myzel in comp.dsp6 years ago 2 replies

Our group is conducting a research about filtering pitch of a sentence. What specific software can we used in order to detect its pitch and...

Our group is conducting a research about filtering pitch of a sentence. What specific software can we used in order to detect its pitch and filter it? Respectfully yours, Myzel Hosmillo Batangas, Philippines


Pitch issues in opera singing

Started by Manuel M in comp.dsp12 years ago 3 replies

axlq wrote: > smuglr wrote: > > I know the general subject of pitch detection has been flogged > > to death, but I am looking...

axlq wrote: > smuglr wrote: > > I know the general subject of pitch detection has been flogged > > to death, but I am looking specifically for pitch detection in > > a sung melody. > > I'm wondering how that will work with some opera singers, who > have such a heavy vibrato in their voice that there's no > detectable constant pitch, rather a modulated frequency.


Harmonization

Started by jungledmnc in comp.dsp9 years ago 10 replies

Hi, I'm thinking about an audio effect, which is probably called harmonization. I think it should teoretically apply several pitch changes and...

Hi, I'm thinking about an audio effect, which is probably called harmonization. I think it should teoretically apply several pitch changes and sum all of them together. At least this is what I think is harmonization. Probably all of the pitch changes might be a multiply of 2 (octaves). Any ideas? It might be done by brute force - STFT for each of the pitch change - but it does not seem very fa...


Pitch Shift using DFT?

Started by nearly blind in comp.dsp13 years ago 1 reply

I coded a quick Matlab script to do a pitch shift using the first method that came to mind and which I'm guessing is the first method that comes...

I coded a quick Matlab script to do a pitch shift using the first method that came to mind and which I'm guessing is the first method that comes to everyone's mind when they first think about this problem. I took the time samples divided them into overlapped frames, took the DFT of each frame, pitch shifted, and took the IDFT, etc. By pitch shifting the DFT I mean: (SHIFT < 1) for i=1


TIMIT database and pitch detection

Started by Ross Clement (Email address invalid - do not use) in comp.dsp12 years ago 1 reply

/* cross-posted to both comp.dsp and comp.speech.research */ Hi everyone. I note that a lot of papers on pitch detection use the TIMIT...

/* cross-posted to both comp.dsp and comp.speech.research */ Hi everyone. I note that a lot of papers on pitch detection use the TIMIT database for experiments. However as far as I can see from readme files, the database does not include verified pitch information for the sentences. How then do people measure the accuracy of their pitch-detection methods. I haven't yet read in detail eve...


Polyphase filter outputs

Started by nikolatesla20 in comp.dsp8 years ago 10 replies

Hi, I am almost a complete newbie when it comes to DSP. I've been studying various internet articles a lot over the last week but I still have...

Hi, I am almost a complete newbie when it comes to DSP. I've been studying various internet articles a lot over the last week but I still have some questions that I don't understand. What I'm trying to accomplish is to resample an audio signal to change it's pitch. I don't care if the length changes, I just want to get pitch changes. Since some pitch changes may be somewhat small (notes) I n...


Pitch detection

Started by altmeyermartin in comp.dsp12 years ago 38 replies

Hi dsp programmin gurus all over the world.... I?m looking for a rock-stable algorithm to do some pitch detection for a chromatic...

Hi dsp programmin gurus all over the world.... I?m looking for a rock-stable algorithm to do some pitch detection for a chromatic tuner. (should work with bad-signal input, like pitch detection through a telephone line...) any ideas ? with compliments, and best thanx to any answer martin


Pitch shifting on TMS320C6713?

Started by mr_alex in comp.dsp11 years ago 1 reply

Hi there, I am going to attempt to program the TMS320C6713 with a pitch shifting algorithm to work in as near real-time as possible. Does...

Hi there, I am going to attempt to program the TMS320C6713 with a pitch shifting algorithm to work in as near real-time as possible. Does anyone have experience of using this board for this type of application? I was looking at the code on www.dspdimension.com for pitch shifting. Could this be easily adapted for use on the TMS320C6713? Any help or advice appreciated! Bob.


Pitch detection in voice (singing)

Started by smuglr in comp.dsp12 years ago 20 replies

Hi, I know the general subject of pitch detection has been flogged to death, but I am looking specifically for pitch detection in a sung...

Hi, I know the general subject of pitch detection has been flogged to death, but I am looking specifically for pitch detection in a sung melody. It will be performed in real-time with high signal-to-noise. I'm currently using auto-correlation to find an estimate or the fundamental frequency, and then using phase-unwrapping to get high resolution. This works well for many instruments, but se...


Help with pitch extraction

Started by bouyang in comp.dsp12 years ago 1 reply

I have looked at some literature on using autocorrelation or AMDF for picth detection/extraction. If I understand correctly, all these methods...

I have looked at some literature on using autocorrelation or AMDF for picth detection/extraction. If I understand correctly, all these methods have two parts -- first construct the functional that can be used to extrac the period/pitch (AMDF, autocorrelation etc.), second, find peak/null and the associated lag index to obtain the pitch. What I need help is how the extraction part is general...


what means about "pitch" in speech coding?

Started by yangrui in comp.dsp12 years ago 1 reply

Anyone know what means about "pitch" in speech coding and what is the theory about find pitch in the packet loss concealment algorithm?thanks.

Anyone know what means about "pitch" in speech coding and what is the theory about find pitch in the packet loss concealment algorithm?thanks.


Discriminating Human Voices

Started by I. lesher in comp.dsp14 years ago 1 reply

Hi All, I write some software that discriminate voices of adults children and baies. I use a simple pitch tracker that filters the base band...

Hi All, I write some software that discriminate voices of adults children and baies. I use a simple pitch tracker that filters the base band and looks for a zero crossing to identify the pitch. This works fine and depending on the pitch length it decides whther its an adult a child or a baby voice. I'm looking for a way to improve the algorithm by checking the formants or other voice para...


C++ Simple Pitch Shift

Started by OJB in comp.dsp11 years ago 14 replies

Hey, My name is Owen and I am currently working on a project for my University Degree. I am a complete newbie to the world of DSP. I am basically...

Hey, My name is Owen and I am currently working on a project for my University Degree. I am a complete newbie to the world of DSP. I am basically looking for *basic* algorithms (or as basic as possible) for simple pitch shifting and time shifting. I'm not overly fussed with having the best possible sound, I just generally need help with where to begin coding for a time and pitch shifter. The si...


Pitch detection - for a newbi

Started by EagerToLearn in comp.dsp11 years ago 34 replies

I am interested in learning about Pitch Detection. I am a c/c++ programmer (20+ yrs) and am interested in pitch recognition for the purpose of...

I am interested in learning about Pitch Detection. I am a c/c++ programmer (20+ yrs) and am interested in pitch recognition for the purpose of developing an ear training program for my grandsons, ie, a program to help someone develop the ability to play by ear, simple melodies. My math skills include the standard 3 calculus for engineers courses (however I'm not sure how much I remember,...


help for pitch tracking

Started by kalyani in comp.dsp9 years ago 1 reply

Hi! I want to analyse music clip.doing STFT on this clip for pitch tracking results for time vs frequency graph. the graph should be 2D plot....

Hi! I want to analyse music clip.doing STFT on this clip for pitch tracking results for time vs frequency graph. the graph should be 2D plot. how to do this in matlab? I want to find out the pitch of tones in music clip. regards kalyani