similar sounds need to be identified.... ideas?

Started by NightHawk in comp.dsp12 years ago 16 replies

There are 2 very similar sounds, and I need a method to automatically identify if its of type 1 or type 2. Sounds of type 1 have a...

There are 2 very similar sounds, and I need a method to automatically identify if its of type 1 or type 2. Sounds of type 1 have a manufacturing defect, while sounds of type 2 have no defects. The problem is the sounds are very similar, and so far, I have tried the Fourier Transform to try and find something that makes each sound unique( one or more specific frecuencys present in items with o...


Source separation of harmonic sounds when f0 and harmonics are given??

Started by Arie in comp.dsp13 years ago 9 replies

I have a collection of sound files (mono, 44100, 16bit) where two harmonic musical instruments are playing together, e.g. cello...

I have a collection of sound files (mono, 44100, 16bit) where two harmonic musical instruments are playing together, e.g. cello and flute. For each frame of the sound (4096 samples, hop=1024), I have the f0's and the harmonic frequencies (not their amplitudes) already known for both sounds. Can anybody recommend me of a good way to separate the sounds, i.e. produce separate wavs for bot...


What is the word? (sound quality)

Started by Carlos Moreno in comp.dsp13 years ago 15 replies

Hi, I'm looking for the word (adjective) that describes that quality of the sound resulting from having the right amount of high...

Hi, I'm looking for the word (adjective) that describes that quality of the sound resulting from having the right amount of high frequencies. For instance, if you low-pass filter a piano sound at, say, 3kHz, it sounds different. In Spanish (at least where I come from), we would say that the low-passed version sounds "opaque", and the version with the right amount of high-frequencie...


Re: How does a cd produce sound ? It's Plastic.?

Started by Anonymous in comp.dsp9 years ago 4 replies

It doesn't PRODUCE sounds, it STORES millions of digitized samples of sounds which are reconstructed into continuous audio streams by...

It doesn't PRODUCE sounds, it STORES millions of digitized samples of sounds which are reconstructed into continuous audio streams by signal processing hardware.


OT: Hearing a phone charge up

Started by Major Misunderstanding in comp.dsp11 years ago 7 replies

A lady just contacted me and says she can hear her Nokia phone charging - like a pulsing sound. Nobody else can hear it but when it is switched...

A lady just contacted me and says she can hear her Nokia phone charging - like a pulsing sound. Nobody else can hear it but when it is switched on she registers the sound from some 2-3 metres away. When it is charged the sound stops. I also know of another person who can hear similar sounds from electrical equipment. Could this be a low frequency sound or is it something odd happening...? Wit...


removing dc offset from 24-bit sound samples

Started by Arun Chandra in comp.dsp2 years ago 27 replies

hi folks, is there freely available C code to remove DC offset from 24-bit sound samples? I have tried modifying code that was released by...

hi folks, is there freely available C code to remove DC offset from 24-bit sound samples? I have tried modifying code that was released by robert bristow-johnson for use with 16-bit sounds, but I'm unable to modify it correctly for use with 24-bit sounds. any leads would be appreciated. Arun Chandra COM 301 Performing Arts The Evergreen State College Olympia WA 98505


sound risks?

Started by It's me in comp.dsp14 years ago 4 replies

Good day to everybody! I've recently begun a research about computer generated sound and I still want to continue with that work for some...

Good day to everybody! I've recently begun a research about computer generated sound and I still want to continue with that work for some months. I'm creating different sounds using compositions of sinusoidal waves of different frequencies. I listen to the sound I create using the typical hi-fi equiment with tape decks, cd reader, radio and so on and an AUX input that I attach to the...


Sound generation on the PC

Started by XIAOBIN HAOO in comp.dsp13 years ago 5 replies

Hi, Im interested in learning how to generate sounds (e.g. music synthesizer) on the PC with software, talking to a sound card. Can...

Hi, Im interested in learning how to generate sounds (e.g. music synthesizer) on the PC with software, talking to a sound card. Can anyone suggest some tutorials to get started? Thanks, Redd


how to make sounds with C++

Started by laserbeak43 in comp.dsp10 years ago 7 replies

hi, how would i go about creating something that makes sound and sending it to an output so i can hear it? sorry for the very simple question,...

hi, how would i go about creating something that makes sound and sending it to an output so i can hear it? sorry for the very simple question, but what i want to do is learn how to make sounds(as low-level as i could(could want to)) and send them to an output, without the use of third-party libraries such as portaudio, etc.


Comparing audio (wav) files

Started by aten in comp.dsp14 years ago 3 replies

I'm writing a program that has a section that requires the comparison of two wav files. The sound files will be really small. I'm interested in...

I'm writing a program that has a section that requires the comparison of two wav files. The sound files will be really small. I'm interested in sounds like a hand clap, or wood hitting wood, or wood striking tin. Little sounds. My section of the program would read two sound files into memory, apply some sonic algorithm on both. The output of that algorithm should be stored in some data struc...


Detecting Speech Vs non-Speech and random sounds?

Started by Anonymous in comp.dsp2 years ago 1 reply

When I am getting a audio clips through internet, in addition to speech (expected sound), there could be distortion - sound could not be...

When I am getting a audio clips through internet, in addition to speech (expected sound), there could be distortion - sound could not be intelligible due to distortion. What might be a sure fire way or any other ways to detect this - other than noise suppression? If it is a good speech sound, then I want to do some feature extraction - before extracting features, I want to decide if it is go...


Sound Identification/Matching - good starting point?

Started by roschler in comp.dsp9 years ago 28 replies

Can anyone recommend a good starting point for creating code that does Sound Identification/Matching? I was going to start creating a library...

Can anyone recommend a good starting point for creating code that does Sound Identification/Matching? I was going to start creating a library of FFT snapshots consisting of varying time window lengths for the sounds I want to identify in audio streams. Then I was going to start matching up sounds that way by comparing snapshots taken from incoming audio seeing how close they are to the libr...


Minimum Edit Distance

Started by sara in comp.dsp11 years ago 2 replies

Hi, I am wondering if anyone can help at all. What I need to do is to find the minimum edit distance path between 2 sounds(wavfiles), sound A...

Hi, I am wondering if anyone can help at all. What I need to do is to find the minimum edit distance path between 2 sounds(wavfiles), sound A and sound B. they will need to be divided into 40 ms frames and then I need to find matching frames ie. the ones with the lowest distance. I then need to return the time of the matched frame. In other words, I know the time of a vowel in sound A but ...


Sound Card Question

Started by HelpmaBoab in comp.dsp11 years ago 5 replies

Are there any sounds cards that have 4 inputs that are synchronised? Thanks Tom

Are there any sounds cards that have 4 inputs that are synchronised? Thanks Tom


Filtering base sound

Started by Bill in comp.dsp12 years ago 6 replies

Here is the scenario, I have a room with a known noise source, and a normal sound source like a person talking, background noise etc. If I...

Here is the scenario, I have a room with a known noise source, and a normal sound source like a person talking, background noise etc. If I record the known source and also record the regular sounds can I use the recording of the known source to filter itself out of the regular sound track? Picture a room with radio turned on but off station, white noise, and then having a person speaking. ...


Sound Localization Matlab, Please Help!

Started by staplep in comp.dsp8 years ago 12 replies

As part of my college engineering thesis, I have been assigned the task of identifying and locating sounds using MATLAB. So far, all I have is...

As part of my college engineering thesis, I have been assigned the task of identifying and locating sounds using MATLAB. So far, all I have is a two-microphone set-up, which comprises the audio signal for analysis. This is split up into two vectors in matlab, and using the time delay information, I need to be able to locate the sound. I've done a fairly basic frequency analysis just to get some ba...


dB and dB(A)

Started by fisico32 in comp.dsp6 years ago 8 replies

Hello forum, I understand what dB and dBm are. I am still a little confused about dB(A). I know that the sensitivity of the human ear to...

Hello forum, I understand what dB and dBm are. I am still a little confused about dB(A). I know that the sensitivity of the human ear to sound depends on frequency: two sounds of the same sound pressure but different frequencies may appear one louder than the other. Humans hear high frequency noise much better than low frequency noise. An A-weighting filter deemphasizes low frequencies. D...


MFCC Comparison of Same Speech Sample Recorded with 2 Different Microphones

Started by Raeldor in comp.dsp7 years ago 1 reply

Hi All, I am using MFCC to compare the same speech same recorded with 2 different microphones. When I check the correlation of the MFCC...

Hi All, I am using MFCC to compare the same speech same recorded with 2 different microphones. When I check the correlation of the MFCC data it comes back with only a 32% positive correlation. One sample sounds very clean (headset), the other sounds like it's being played back through a transistor radio, but they are the same sound sample. Is there a common technique either during pre-...


Fast Coarse Spectrum Analysis of Sound Samples in Java

Started by John David Eriksen in comp.dsp3 years ago 9 replies

Hi All, I'm working on a fun little audio side-project. I want to be able to create a sound collage using sounds I find online. I hope you...

Hi All, I'm working on a fun little audio side-project. I want to be able to create a sound collage using sounds I find online. I hope you can point me in the right direction with regard to algorithms, approaches, etc. I'll be writing a Clojure (Java) program to find and download mp3s, chop them up into chunks, perform spectrum analysis on the chunks, and then write an algorithm to laye...


Synthetic route to a sound sample

Started by Anonymous in comp.dsp12 years ago 1 reply

Hi, Everyone! I come from the field of organic chemistry where we synthesize complex molecules found in nature from simple ones. That is why I...

Hi, Everyone! I come from the field of organic chemistry where we synthesize complex molecules found in nature from simple ones. That is why I got interested in sound synthesis: an attempt to synthesize natural sounds from simple oscillators and waveforms. In organic chemistry we identify molecular structure of a substance and then attempt to build that entity from simple molecules. In sou...