Questions tagged [voice]

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How to detect known audio samples within a stream of audio

If I've got a bunch of short .wav files, 16 bit linear pcm, and an incoming stream of audio that's been run through a voice codec (g.722, g.711, or others) and then converted back to pcm, what's the ...
Matt DiMeo's user avatar
2 votes
2 answers
101 views

Anonymize / Obfuscate speech when doing audio classification

Let me preface that I am new to audio processing and audio analysis ;) (I asked the same question on reddit, I wanted to increase it's reach)) I am trying to classify specific events (like a gong or ...
Hurricane's user avatar
1 vote
1 answer
225 views

How to generate human voice fft?

I want to generate human voice using fft. For this, I analyzed a fft of my mother saying "e" and the result was that the points are in a normal distribution. Then I created a fft using a ...
Eleno's user avatar
  • 33
0 votes
1 answer
517 views

Voice activity detection (VAD) libraries 2023

I am trying to use (not implement VAD algorithm) voice activity detection to get timestamps for a given audio but facing hard time doing so. What I am trying to achieve ? Find an offline library for ...
Gangadhar Jannu's user avatar
4 votes
1 answer
3k views

As of 2023, is it possible to extract two human voice from single audio track?

Isolation of different human voices from audio Separate two voices from a speech signal Several years ago it was hard to extract voice from music and almost impossible to separate two human voices ...
Schezuk's user avatar
  • 143
3 votes
0 answers
110 views

How to extract human voice from cluttered signal?

I have a signal which has human speech, background voice and noise as it can be seen in below figure. I have calculated its power spectral density (PSD) using many different methods which can be seen ...
sdkmlcngz's user avatar
0 votes
1 answer
148 views

What's the difference between male and female voice? [duplicate]

If I record the voice of a man and a woman, what are the main differences I get in the various spectra and harmonics in Fourier analysis?
Luca Leone's user avatar
0 votes
0 answers
43 views

What happens if I register my entry?

Taking as an example that I want to record my voice. How does it appear in the frequency spectrum? Can I also view it on other spectra?
Luca Leone's user avatar
1 vote
1 answer
53 views

Similar voice features for imitated voice

What kind of audio signal features/properties are appropriate for signal similarity measurement invariant to imitation? Basically I would like to do the following: Having a template (e.g. a spoken ...
Micka's user avatar
  • 156
1 vote
1 answer
49 views

Did Dialup Modem use closed or open loop power/volume control? How did they determine Tx level?

I have been reading about dialup modems, but one thing I cannot seem to find out about is how implementers determined optimal transmit power/volume. Is this part of the echo cancelation framework? The ...
Liam Kelly's user avatar
3 votes
0 answers
332 views

How timbre shifting is done?

I've recently came across two programs - Morphvox, VCSdiamond that are able to preform pitch shift, but also timbre shift. As far as I know the timbre is nothing but the amplitude of the harmonics in ...
Dannynis's user avatar
0 votes
0 answers
33 views

Separating several kinds of information in a sound file

I have a 90min audio recording of a lecture using a handheld recorder. Since the recorder was in the shirt pocket of the speaker, I can clearly hear that the their voice is much louder than the ...
pitosalas's user avatar
  • 101
4 votes
1 answer
259 views

Audio Processing - How to create a spectral pitch display?

I want to create an application that analyzes human voice pitch, but spectrograms are very noisy. However, in Adobe Audition, there is a feature called the spectral pitch display, and it successfully ...
Hykilpikonna's user avatar
0 votes
0 answers
16 views

Trim syllable audio recording to only the vowel

For a Chinese learning app, we let users record a syllable and we use speech recognition to assess if the pronunciation was correct or not. Every Chinese syllable can be pronounced with different ...
Paul's user avatar
  • 1
0 votes
2 answers
61 views

Resources for learning vocal signal processing

I was wondering if anyone could point me to any good resources on learning vocal signal processing. I have already learned a chunk of general DSP, but I haven't found any good resources for vocal ...
M S's user avatar
  • 1
-1 votes
1 answer
94 views

How do I detect by ear if a quarter second audio clip is that of someone speaking or not?

I have a dataset of quarter second 16 bit mono PCM audio clips, each clip labelled as speech or nonspeech. I am trying to estimate the quality of the labelling by randomly sampling a few of them and ...
Anand's user avatar
  • 99
3 votes
4 answers
460 views

Meaning of frequency and bandwidth of a signal, despite the fact that we do not know the signal

First of all, I am completely new to the domain of signal processing. As far as I know, a signal can be represented with an infinite integral of infinitesimal complex exponentials, which is known as a ...
Anastassis Kapetanakis's user avatar
0 votes
1 answer
259 views

Male and female voice spectrum

I have a set of data which consists of male and female voices. They are pronunciation of a same sentence. What's the appropriate method for getting an average spectrum for the male and female voices ...
S.H.W's user avatar
  • 726
2 votes
1 answer
699 views

How to compare 2 MFCC (compare them if they where created from same speaker)

There are multiple speakers. Each speaker generates multiple MFCC. If I'm getting two different MFCC, can we know if those MFCC came from 2 different speakers or same speaker ? How can we compare ...
Boom's user avatar
  • 121
8 votes
4 answers
5k views

How can I upsample 22 kHz speech audio recording to 44 kHz, maybe using AI?

I have a 22 kHz mono audio recording, which is mainly speech, a reading. I would like to upsample somehow to 44 kHz, to improve the audible quality. I have read about there are AI methods for ...
Konstantin's user avatar
1 vote
1 answer
125 views

Echo removal from a chunk of PCM signal

I have implemented a paper regarding echo detection in real-time using MFCC coefficients. Now, I want to remove the echo from the mixed signal. Let me explain it as: There are two signals, NearEnd ...
Khubaib Ahmad's user avatar
-1 votes
1 answer
137 views

LPC Formant Estimation: Why resample?

The Burg algorithm implemented in PRAAT for formant estimation also works via LPC. First the sound is resampled to a sampling frequency of twice the value of maximum formant. Then a pre-emphasis is ...
Tom Huntington's user avatar
2 votes
3 answers
145 views

Obtain Envelope and Pitch curves of my Singing Voice

I wish, in real time, to hum into a mic and produce via dsp the envelope and pitch of what I am humming, before outputting these two signals to my analog synth. This synth takes a gate and a cv signal....
Baz's user avatar
  • 275
0 votes
1 answer
620 views

Speech recognition algorithm in GNU Octave to convert speech to text (and vice versa)

Recently, I am building an application in Octave and I saw some algorithms about speech recognition spread around the net, but most of them were implemented in Python, MATLAB, C++ and no one in Octave....
theEarlyRiser's user avatar
0 votes
0 answers
28 views

Compute objective speech quality from Anritsu data

I want to compute an objective speech quality however what I have right now is the Anritsu raw data (layer between the Base Station Controller and the Mobile Switching Center), this raw data does not ...
Nassereddine Belghith's user avatar
0 votes
1 answer
65 views

what are the vector formats similar to hash codes to store user's voice for future voice verification?

I have wav file of ~2-10sec of user's voice, taken from a conversation. Maybe it's SIMILAR TO a hash code. the general voice verification should look like: wav file -> vector new wav file ->vector ...
ERJAN's user avatar
  • 103
1 vote
1 answer
68 views

Digital Audio Mixing Fundamental. What will be the data rate of mixed audio?

I have voice data at 128 kbps coming from three different sources. I'm looking for mixing all three voices together and sending it back to speakers. What methodologies are there for mixing digital ...
hctrivedi3's user avatar
1 vote
1 answer
412 views

Adding White Gaussian noise to a voice signal

I'm trying to add White Gaussian Noise to an audio file. However; the energy of the noise should be 1/10th of that of the signal. My first attempt is as following: ...
Jason's user avatar
  • 81
-1 votes
1 answer
74 views

audio classification based only on first few seconds

I record audio notes on my recorder, and each belongs to a certain category ("work", "parenting", "miscellaneous", etc.). At the beginning of each recording, I say the name of the category, then stay ...
philophilosophia's user avatar
0 votes
1 answer
283 views

Initial Clock synchronization between multiple smart phones (android OS) connected over Wifi?

I want to synchronize the initial clock of multiple smartphone devices (Android-based) for real-time VoIP communication. Basically, a MANET has been formed and I want to synchronize the clocks up to <...
Khubaib Ahmad's user avatar
0 votes
0 answers
295 views

How to Synchronize multiple real time audio streams before mixing them?

I have been working on a VoIP solution in which I have to mix multiple audio streams coming from various sources. I have been facing muffled sound after the mixing of streams. I have implemented ASW ...
Khubaib Ahmad's user avatar
1 vote
1 answer
453 views

Preprocess sound for voice recognition in Pocket Sphinx on Raspberry Pi 3

I want to improve my voice recognition system on a Raspberry Pi 3 running Pocket Spinx.
user avatar
2 votes
0 answers
24 views

How to exploit auditory masking to boost intelligibility

I am currently working on a dynamic equalizer to improve a synthesized voice's intelligibility in noisy environments. The current implementation of my algorithm simply applies a parametric EQ to the ...
user43523's user avatar
2 votes
1 answer
238 views

Distort voice to hide talker identity as much as possible

I need to develop an app which makes speech recognition. Because I need to be able to constantly improve the recognition capability, I would like to train the engine with real recordings and match the ...
Ivano85's user avatar
  • 21
1 vote
1 answer
64 views

make a voice sound signal play faster

Suppose $x(t)$ is a signal containing a voice. How can one derive a signal playing the same voice faster. I tried $x(t+\lfloor{100t\rfloor}/100)$ to double the speed; But it adds a buzz sound. Is ...
Minimus Heximus's user avatar
1 vote
1 answer
48 views

How does a telephone change your voice? [closed]

Is it due to vocal length normalization during MFCC? Please be kind enough to explain.
Daki Withanage's user avatar
1 vote
1 answer
208 views

Given MFCC values for some wav’s, how can I easily tell if all speakers are the same?

Context: for a research project I have at regular times a batch of wav files with recordings of voice. The hypothesis is that all speakers in a batch are the same, but there might be 1 or a few “...
EddieM's user avatar
  • 43
1 vote
1 answer
52 views

Voice masking for removing voice and not birdsong

First the problem I'm tyring to solve: I'd like to find a way of removing any potential noise from audio files recorded in noisy environments where we are trying to record birdsong. This is for the ...
Finn Maunsell's user avatar
0 votes
2 answers
150 views

What should I do with FFT result array from microphone input? [duplicate]

I currently want to create a small pitch detector and I have to say that I am very new in this topic of signal processing. At the moment I implemented the FFt algorithm and I got an array of window ...
MusicMagician's user avatar
2 votes
2 answers
360 views

Pitch detection to find music notes (from voice)

Hi signal processing community, currently I am searching a topic for my master thesis in computer science and since I am a very good singer I want to do something with music. I thought about a topic ...
MusicMagician's user avatar
1 vote
1 answer
2k views

How do I deepen my voice (I'm a female) to sound like a man in a video for a school project? [closed]

Some extra info. that I think might help or make things clearer: The video has several other people in it also talking (I don't want to change their voices). I have some experience in editing ...
Fida's user avatar
  • 13
1 vote
1 answer
119 views

Mathematical reason for MCPP in audio recognition?

MCPP uses a weird graph of human phychoacoustics measurements called MEL scale to process digital audio. Why is MEL used in DSP voice recognition if it's based on logarithmic human perception, and ...
bandybabboon's user avatar
2 votes
1 answer
77 views

How to correctly classify voice from other sound events?

I have a huge labeled dataset of several thousand sound events, including human voice, dish washing, things falling to the ground, among others. I need to report when a human voice event takes place....
felipeduque's user avatar
0 votes
1 answer
2k views

Converting Google's text-to-speech voice to, say, Justin Bieber's voice

We are trying to convert text to an artist's voice. For example, we want input text in Justin Bieber's voice. We are converting text to mp3 files in Python using gTTS (Google Text-to-Speech). We can ...
piby180's user avatar
  • 109
0 votes
1 answer
63 views

Does the audio signal in the time domain change much after a RMS from one person to another?

I would like to train a deep neural network to perform lip syncing given an audio input like in this article. I want to train my neural network only on Obama speeches like done in the article and ...
Tiffany's user avatar
1 vote
0 answers
108 views

Signal chain for voice calls including adaptive noise cancellation, adaptive echo cancellation, and automatic gain control and their algorithms

I am trying to understand the entire signal chain and all the algorithms associated with adaptive filtering as mentioned in the case above. From my understanding: Adaptive noise filtering (ANF)- can ...
Akhilesh Rao's user avatar
0 votes
1 answer
276 views

CODECS used for VoIP calls

I am trying to self-study audio codecs and I am trying to understand the difference between CODECS that come under AMR-WB, SuperWB and EVS vs. AAC-LD (MPEG-4). When is the former used and when is the ...
Akhilesh Rao's user avatar
10 votes
3 answers
2k views

How does Siri recognize me saying "Hey Siri"?

I am trying to understand how my iPhone can continually listening for me saying Hey Siri, Alexa, ...
nowox's user avatar
  • 201
0 votes
1 answer
568 views

Raw speech data into spectrogram

I am using Delphi trying to make a very simple speech recognition system. The system collects raw data well, but I have a hard time turning the data into a spectrogram: The system collects an array ...
Thomas Riedel's user avatar
-1 votes
1 answer
166 views

How to build a simple model for voice-controlled system?

I want to build a speaker independent voice-controlled system. If I ask 10 people to say one unique word(for example"hello"), and record their voice and do LPC(linear predicting coding) upon them, I ...
user3486308's user avatar