What is pitch

Started by yaami 7 in Audio Signal Processing9 years ago 3 replies

Hi all, I've seen pitch being defined as the perceived fundamental frequency. I could not get anything from this single statement. When I...

Hi all, I've seen pitch being defined as the perceived fundamental frequency. I could not get anything from this single statement. When I start to read in depth most talk using the musical lingo. I hardly understand anything when it comes to music. My question is when we listen to some speech and it has some fundamental frequency, why is it that we perceive a different frequency. say a 1kH...


Guitar Tuner.. I'm a DSP newbie!!!

Started by "cecco.milani" in Audio Signal Processing9 years ago

Hi EveryBody, I assumed my challenge was simple, but unfortunately it wasn't so simple!!! :-( I just want to have a simple GuitarTuner made...

Hi EveryBody, I assumed my challenge was simple, but unfortunately it wasn't so simple!!! :-( I just want to have a simple GuitarTuner made on my own. I'm not very smart in math so I decided to started from here: http://it.wikipedia.org/wiki/Trasformata_di_Fourier_veloce I made this simple app which gets an audio sample of the guitar's "A" string, then reads all bytes (except the head...


Looking for Freescale Symphony Soundbite

Started by cine...@passport.ca in Audio Signal Processing9 years ago 1 reply

Hello, Trying to buy a Symphony Soundbite audio development board but can't find a distributor with one in stock. Would anyone know where I might...

Hello, Trying to buy a Symphony Soundbite audio development board but can't find a distributor with one in stock. Would anyone know where I might find one beyond the obvious distributors? If anyone knows any similar DSP development boards targeted to audio applications I would be interested in knowing about them. I'm preferably looking for something with audio in and at least 8 audio outputs. T...


Filters for Noise cancelation

Started by ashw...@yahoo.co.in in Audio Signal Processing9 years ago 4 replies

Hello, I require some guidance regarding the filters to be used for removing noise from Audio files. I have been given a set of noisy Audio...

Hello, I require some guidance regarding the filters to be used for removing noise from Audio files. I have been given a set of noisy Audio files as part of my assignment. I have to use different filters design to remove the noise from Audio files. I have used matlab to obtain the frequency response of the noisy audio signals and determine characteristics of the noisy signal. However I am not s...


separating convoluted signals via the cepstrum and truncation error

Started by ivan...@gmail.com in Audio Signal Processing9 years ago

Hi all . I am student. Sorry for my bad English. I am trying to separate convoluted signals. There is MATLAB code > > x=1:1000; > > ...

Hi all . I am student. Sorry for my bad English. I am trying to separate convoluted signals. There is MATLAB code > > x=1:1000; > > y=[ 0.2*sin(x) zeros(1,49000)]; % original signal > > b=[1 0 0 0 0 0.5]; % coefficients > > a=1; % coefficients > > h=[1 0 0 0 0 0.5 zeros(1,49994)]; % impulse response > > z=filter(b,a,y); % adding echo with delay=5 samples > > ch=c


FIR filter using IPP

Started by Peter L in Audio Signal Processing9 years ago 1 reply

Hello: I am trying to build simple projects using the Intel's IPP audio DSP library. Here I am trying to come up with a simple low pass...

Hello: I am trying to build simple projects using the Intel's IPP audio DSP library. Here I am trying to come up with a simple low pass filter. I obtained the filter taps using FDATOOL in MATLAB. But I am not fully familiar on using it. void LPF_FIR_Filter(const Ipp32f* pSrc, Ipp32f* pDst, int numIters, IppsFIRState_32f* pState) { int tapLen = 11; float taps[11] = { -0.05986175314...


ADC format

Started by MonaLiza in Audio Signal Processing9 years ago 2 replies

Hi everyone, So I am working on a speech processing project on MATLAB, and I recently got this speech data base. The CD has the speech stored...

Hi everyone, So I am working on a speech processing project on MATLAB, and I recently got this speech data base. The CD has the speech stored in an ADC format; anyone have a clue how to read this format in MATLAB or how to convert it to WAV? Thanks a lot


Near-realtime lossy compression of many PCM streams

Started by Iain Surgey in Audio Signal Processing9 years ago

Hi, I want to build a server that can compress many different PCM streams simultaneously. This laptop can encode mp3 at 18x the speed of...

Hi, I want to build a server that can compress many different PCM streams simultaneously. This laptop can encode mp3 at 18x the speed of playback, which theoretically means it could encode up to 18 different streams in near-realtime (in reality this would probably be lower). With faster hardware this would improve, perhaps to the region of 50 streams. However I want to be able to handle ...


Pulse detection

Started by teid...@gmail.com in Audio Signal Processing9 years ago 2 replies

Hello, I'm working in a undergraduate computer engineering project about recognition of bird species from their songs, and I would like to ask...

Hello, I'm working in a undergraduate computer engineering project about recognition of bird species from their songs, and I would like to ask some help. To that end, one method I'm utilizing is splitting the songs into pulses, and identifying each pulse separately. To that end, I need to identify, automatically (batch processing, it needs to be done in several files), pulses within an audio f...


audio effect for distorted voice over radio

Started by uray meiviar in Audio Signal Processing9 years ago 2 replies

Hi, I'am quite new to DSP algorithm, currently I'am developing a software to manage communication of Pilot to Ground in a flight simulator, I...

Hi, I'am quite new to DSP algorithm, currently I'am developing a software to manage communication of Pilot to Ground in a flight simulator, I have problem that the voice from pilot is too clear, I need to make it like real radio communication voice which include a distortion or any "un-clarity" which usually heard if you're listening to radio voice. my question is: is there any dsp ...


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