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Questions tagged [audio-processing]

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14 views

What is the best input for de-noising autoencoder for sound data?

I am currently trying to build an autoencoder to de-noise audio data. However I have not found any good articles explaining about the input to the autoencoder, i.e. feature vector. As in speech ...
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1answer
34 views

difficulties implementing windowed sinc interpolation (C++)

I'm currently trying to implement a windowed sinc interpolation. I've already written some code for that, but it only seems to work for cases where phaseInc <= 1.0 (phaseInc = outSampleRate / ...
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0answers
25 views

Is there a big data solution to analyses hydroacoustic data? [closed]

I'm looking for tools to work on hydroacoustic data, basically I want to measure biomass volumes from using the data recorded from echo sounders, the final product I´m aiming to is a biomass heat map, ...
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1answer
32 views

What is the difference between undersampling and oversampling in analog to digital conversion ?

When converting a signal from analog to digital, we observe undersampling and oversampling. Does oversampling means that the sampling frequency is greater that the signal's frequency and does ...
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1answer
105 views

Compute group delay of an audio file from STFT

I'd like to reproduce results from this paper in which the authors used Group Delay-grams as an input to the Machine Learning model. The Machine Learning side is not the one that I have problems with. ...
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2answers
60 views

Interpolation of audio for new frames

I am trying to upsample a video by existing frame interpolation techniques. In the process, I realize that I also need to interpolate the audio signal for the new frames so that the audio signal is in ...
-1
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1answer
40 views

price of dsp kit TMS320c6678(used for signal processing) [closed]

This kit is used for implementing DSP concets in hardware What is the meaning of highlighted price in attached fig? Does it means 120 dollar per unit chip price?Figure
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0answers
28 views

Using MFCC and DTW for clustering music

There are lots of information on the web about using MFCC features and DTW distance between voice signals to measure their similarity. I have been thinking of using these methods to cluster music ...
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3answers
66 views

Does 1 kHz sine tone means $\sin(2(1000)\pi t)$ or $\sin(2(500)\pi t)$?

Does 1 kHz sine tone means $\sin(2(1000)\pi t)$ or $\sin(2(500)\pi t)$?
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0answers
29 views

Determine the onset’s in an audio file

I want to determine the onset’s in my audio file which means determine all the frequencies and the corresponding notes present in my audio file. Please help me with an approach in python to achieve ...
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0answers
27 views

Sound recognition within an audio signal

I'm trying to do some tests in Android. The phone's microphone is continuously listening, and whenever a balloon is blown, I would like to detect it. There are of course other ambient sounds/noises. ...
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1answer
15 views

Is there a software tool or web service to detect problems in speech recordings?

I am looking for a software/library or a web service/API that can detect problems in short samples of recordings of speech. For example echo, clipping, pop, background noise... Do you know of any ...
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2answers
82 views

Modeling the human perception of noise

Add together some sinusoids with irrational or "nearly" irrational frequency ratios, and you get something pseudoperiodic. If there aren't too many, you can hear that it has only pitched components, ...
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1answer
62 views

Frequency detection in audio and what parameter or set of parameters help/limit frequency detection

I'm trying to learn audio and voice/speech processing techniques out of interest. I intend to learn, experiment with algorithms and design, implementation of such systems, frameworks using programming ...
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0answers
18 views

Modelling Psychoacoustic bass boost

I am motivated to try out psychoacoustic bass boost to my DIY speaker. Now the most popular reference comes from Maxxaudio which has a commercial plugin but I was looking for something off the shelf ...
2
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4answers
76 views

Baby Cry recognition robust against the distance [closed]

I am building a baby cry detection system using deep learning algorithm, Raspberry Pi and a microphone as the sound sensor. When the baby starts crying then the system should detect the cry. It is ...
-1
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1answer
58 views

Pitch Calculation Error via Autocorrelation Method

Aim : Pitch Calculation Issue : The calculated pitch does not match the expected one. For instance, the output is approx. 'D3', however the expected output is 'C5'. Source Sound : https://...
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3answers
44 views

harmonic algorithm for extending compressed bandwidth of audio file

I just found this site and feel at home :) I've been playin around with python and some compression ideas and was wondering if there's anything like what I am trying to figure out... I've noticed ...
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0answers
35 views

Generating values of EQ presets

I am using this project in Rpi - bmc0/dsp It allows to set various effects and DSP setting to the entire audio stream of the device. I wanted to get some common preset values like Pop, Dance, Rock, ...
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1answer
28 views

Is the phase difference between recorded sounds from left and right ear the same as the phase difference between their HRTF?

Pardon my ignorance if my question is silly. Lets say I did a binaural recording and found the phase difference between right and left channel. If the recording was done in anechoic chamber, where ...
0
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1answer
42 views

Analyzing audio by looking at its time-frequency points in real- imaginary plane

I am performing Short-time Fourier transform on an audio signal (I dont know how to attach the audio file here). The sound was recorded in anechoic chamber and the source is supposed to come from left....
1
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1answer
25 views

Audio Processing Used in Voip Mobile Apps

I am new to VoIP apps and am learning about the various audio processing that are applied in such apps. I have looked at Linphone and ...
0
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1answer
56 views

Estimate a microphone's transfer function

I am trying to compare the transfer functions of k different microphones and need some advice on my current approach. As of now, I have attempted the following: Play a pink noise test tone $(X)$ ...
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2answers
78 views

Audio Quality Assessment [duplicate]

I need an algorithm to assess the quality of a given audio. The task, is considered to be no-reference. Can anyone help me whether there is any method for quality assessment of any given audio? edit1:...
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2answers
499 views

Understanding the frequency domain [duplicate]

I'm trying to understand what frequency domain is. I found general explanations on the Internet, for example: frequency-domain graph shows how much of the signal lies within each given frequency band ...
1
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1answer
53 views

How many psychoacoustical critical bands are there?

I understand that the human ear works as a band-pass filter and I have doubt regarding the number of such bandpass filters in the filter bank. I came across these two possible explanations of how it ...
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0answers
136 views

Noise removal and speech enhancements

I am working with peak extraction from audio files (something like shazam) in python. I only need to focus on human speech. Audio is recorded from single channel common mic. Can someone help me with ...
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2answers
358 views

Finding Reference Audio Signal in Test Audio Signal and Cropping Accordingly

As seen in the diagram, below I have a reference audio and a test audio. I want to find at what part of the test clip the reference audio be heard. Once, that is found I want to crop the test file ...
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1answer
672 views

Filtering an Audio File in MATLAB

I am trying to process an audio file in Matlab by filtering out all frequencies except those within $\pm 25\ Hz$ of $523\ Hz$ (as well as its harmonics up to the Nyquist). The resulting waveform ...
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2answers
199 views

Audio Denoising - Method which Extends the Naive Noise Reduction

Given an audio signal x[n] sampled at 44.1khz (let's say 1 minute of music or speech) and a noise template noise[n] (let's say 2 ...