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Pitch

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 prediction gain

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

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

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 question

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 5...

TIMIT database and pitch detection

/* 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 the...

Real-time speech pitch tracking... what library you suggest? does aubio work?

Hi, I am looking for a free code/library preferably under linux for speech pitch tracking. The best match I have found so far is "aubio" library. However, it seems to be mainly for music applications. Does it make a difference to usea pitch tracker for music vs speech or they are generally th...

Re: ITUT G729 preprocessing question

HyeeWang wrote: > Maybe I am confused with the concept of pitch and fundmental > frequency. But I did not find the difference of them. So after cutting > off the frequency below 140hz of speech,I think it have lost pitch > components thus pitch searching algo does not work. > Would...

Harmonization

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? ...

Pitch shifting on TMS320C6713?

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 t...

what means about "pitch" in speech coding?

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

Pitch calculation (FFT or autocorrelation)

Hi, I want to show a Pitch graph/curve of a wave file. I saw that good results can be made by using AutoCorrelation. I have the autocorrelation function and I also have the FFT function, but I don't know what I should put into the autocorrelation function in order to get a pitch line. I have a...

Modification of signal using short term Fourier transform

I would like to do some signal modification applying all of pitch detection, pitch shifting, and filtering (which will depend on the pitch of the signal) using the short term Fourier transform. Sadly I haven't ever previously gone beyond simple filtering using the STFT. Is the following link a...

Re: Pitch detection

in article d1mctv$rmb$00$1@news.t-online.com, altmeyermartin at martin-altmeyer@t-online.de wrote on 03/21/2005 06:58: > 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 w...

help for pitch tracking

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 ...

Timestretching with Granular Synthesis: Keeping the pitch constant?

I have made a program that timestretches WAV sound files using granular synthesis. It has three variable input values: % stretch factor, grain length (in samples) and grains per second. All seems to be working fine except for one problem I'm having with the pitch of the stretched sound. If,...

Discriminating Human Voices

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 v...

Pitch Shift using DFT?

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 fra...

Re: Hilbert transform FIR size

jungledmnc wrote: > I want to create a frequency shifter for audio. Are you sure you want a frequency shifter and not a pitch shifter? Pitch shifers are much more commonly used for audio than frequency shifters. Pitch shifters do: for all Fin : Fout = Fin * a which preserves the...

Pitch Shift Controller

Hello I'm a university student and am completely new to the DSP world, but am attempting to do my final year project. What I'm trying to do is to use a a guitar as a controller to pitch shift a pre-recorded sequence to match the fundamental frequency of the guitar note being played. (in as much ...

Re: C++ Simple Pitch Shift

OJB wrote: > 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 f...

pitch detection

Hi! I'm currently working on a project for the extraction of some features from a .wav file,implemented in matlab. Someone know where can I find a good pitch detector? I've found something on the web,but it's all for speech,or it works bad. Thanks G ...

Using Multirate algorithm for doing pitch shift effect ?

Hi, I'm trying to implements a pitch shift effect (up / down a .wav sound 44100Hz 16bit to different semitones in the range of around 1 octave). My problem is that I need to do it on about 15 sample simultaneously in real time. The classic pitch shift algorithms use too much of processor time...

lpc vocoder.clarification needed.pls

Hi i'm using lpc vocoder for my speech recognition. If i'm doing only alphabet A-Z, I only need the encoder part. Is that correct? As i know, lpc vocoder determine the lpc analysis and pitch detector. If i wan to get the coefficients only for my neural network recognition, I dun need the pi...

Help with pitch extraction

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...

Pitch detection in voice (singing)

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, ...

Pitch detection of speech buried under white noise

Hi Everybody, Can anybody tell me about a pitch detection algorithm which works in noisy environment. Many Thanks in advance. _____________________________________ Do you know a company who employs DSP engineers? Is it already listed at http://dsprelated.com/employers.php ?...

Good quality voice pitch-shift algorithms (Digitech, TC Helicon, Eventide)?

Hi, After a lot of searching I've been unable to find out anything at all on the algorithms used by the better vocal harmony / pitch shifters. Can anyone point me to a useful link? Tony (remove the "_" to reply by email) ...

Vocal pitch detection

hi I would be happy and thankful if anyone can help me with the following *what algorithm to use for vocal pitch detection *is it possible to implement it in a real time system using TMS320C50 hoping for your reply ...

Pitch shifting and playyback speed changes FAQ

A friend came across some software for changing playback speed without distorting pitch. I know I've seen a FAQ that covers the application. Where should I refer him. He's a musician with a BSEE. ...

speed, pitch and tempo

Hello, I'm looking for a tutorial or any web reference to know more about changing speed, pitch or tempo of an audio signal. Can anyone point me in the right direction? Thanks, gaetano ...

Re: OT: Chipmunks

dunno how to get rid of the chipmunks, but if you pitch-shift their voice down with a conventional pitch-shifter (non-formant-preserving, so the formants are also shifted down), you might be able to hear the "man behind the voice". works for Alvin, anyway. r b-j ...

autocorrelation code for full signal

Hi: i got the source code of autocorrelation (AC) for a frame (for example: 600 samples out of 40000 samples) of a signal. Can anyone show me the AC code for the whole 40000 samples which means continuosly analyse every 600 samples up to the 40000th samples, so that the result would be stor...

Analog Pitch Shifter

Is it possible to create a pitch shifter using an analog circuit? I know this site is about DSP's but it seems to have a lot of readers, so maybe someone can help me out. Thanks ...

pitch synthesis and lpc codebooks and excitation signal

I am trying to use gsm network to send secure data encoded as voice. For this purpose during my initial research I used 8 bits as lpc codebook index and 4 bits as pitch index. I used these 12 bits to produce 160 samples of voice like data. I am new to dsp so using my limited knowledge I generated...

Re: Speed Change without Pitch Change

jeffdod wrote: > Does anyone know of a C/C++ library for taking an audio file and > performing a speed change without changing the pitch? > > Thanks, > > Jeff Dodson Look on http://www.dspdimension.com/ Jerry -- Engineering is the art of making what you want from things you ca...

Pitch recognition of a musical note on a smart phone

Hi. With limited resources such as slower CPUs, code size and RAM, how best to detect the pitch of a musical note, similar to what a tuner would do? Should I use: - Kiss FFT - FFTW - autocorrelation - zero crossing analysis - octave-spaced filters other? Thank you in advance. -mz...

FFTs of FFTs

Hi, A friend of mine was describing a technique for pitch analysis to me today. If the input consists of mostly harmonic components; then it's FFT has, of course, some nice evenly spaced spikes. If you take the FFT of -that-, then you can relate that back to the pitch. My question is: does th...

Re: Is the Doppler effect really linear?

Raymond Toy wrote: > ... > > So, if I were blindfolded, I could tell if I were in a train moving > towards a whistle instead of the whistle moving towards me? > Only if you knew the original pitch and the speed very accurately. Let's say that the train is moving at Mach .2 (fast, b...

Pitch issues in opera singing

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...