## Forums More audiodsp

## Overlap-add with Spectral Freeze real-time plugin

inHello all, I'm trying to create a spectral freeze plug-in and I'm a bit confused about the overlap add method. This is what I'm doing so...

Hello all, I'm trying to create a spectral freeze plug-in and I'm a bit confused about the overlap add method. This is what I'm doing so far. Windowing (hann) -> FFT -> mess with spectral data -> IFFT -> Windowing Doing this the output sounds a bit strange, even if I don't change any of the spectral data, my guess is because I'm not doing any overlap. Would this be a spot where the over

## Speech Dynamic Range

inHello, I am working on the implementation of a digitally controlled dual loop AGC for a speech processing system. My question regards the...

Hello, I am working on the implementation of a digitally controlled dual loop AGC for a speech processing system. My question regards the dynamic range. Out of the documentation on the web I have thet: DR=20lg(Vmax/Vmin). The microphone I am using has an output DC voltage between 0.2 - 0.7 V. Typically 0.5 V. How would an input 80 dB Dynamic range translate into output Voltage levels? ...

## Calculate Interaural Level Difference from a (stereo) sound file

inHello all, I have at my disposal stereo wave files of binaural recordings, ie recordings for which the left channel corresponds to the signal...

Hello all, I have at my disposal stereo wave files of binaural recordings, ie recordings for which the left channel corresponds to the signal perceived by the left ear, and the right channel to the right ear. I have made a small program that compute the rms amplitude of each channel and takes the ratio, because my recordings have a constant amplitude I figured it would be close to an Intensi...

## DSP development platfrom

inHi All, I have tried to post a few times, so if this message is redundant, please ignore. I'm a E.E. in senior design, and I have an...

Hi All, I have tried to post a few times, so if this message is redundant, please ignore. I'm a E.E. in senior design, and I have an idea for a project that will involve extremely fast convolution of audio signals. I have found a few methods that I believe will work, and I am interested in hearing your opinion on what flavor of DSP or FPGA would be suitable for this task. Basic...

## Eliminating the periodicity in a periodic signal..

inDear all, I have a periodic signal, that I would like to study..However, I want to eliminate the periodicity in it, and study the remainder of...

Dear all, I have a periodic signal, that I would like to study..However, I want to eliminate the periodicity in it, and study the remainder of the data..In other words , is it possible to break down a periodic signal into 2 composite signals (one periodic and the other non-periodic) that when added produce the original periodic signal ...In that manner i can process the non-periodic composite sig...

## PC-based audio processing tools

inHi all. New member here. I have an application that requires measuring the 60 Hz component of a signal in the 20-1000 Hz bandwidth. This was...

Hi all. New member here. I have an application that requires measuring the 60 Hz component of a signal in the 20-1000 Hz bandwidth. This was previously accomplished using TI DSP, with result (amplitude of 60 Hz component) sent to a PC. But for cost and simplicity, I think it can be done directly by the PC via the sound card input. Can someone point me to some software tools or libraries...

## gunshot sound

inHi, i m new in this field. My first question is- which parameters are to be taken for gunshot sound analysis except frequency and...

Hi, i m new in this field. My first question is- which parameters are to be taken for gunshot sound analysis except frequency and energy. My second question is- which software/softwares helps/help in the analysis of gunshot sound. THANX in advance With regards Aman deep Kaur

## Solving complex trignometric equations

inHi, The problem to be solved is -> whether the below digital signal is periodic and if it is, then what is its fundamental period? x(n) =...

Hi, The problem to be solved is -> whether the below digital signal is periodic and if it is, then what is its fundamental period? x(n) = cos(pi*n/2) - sin(pi*n/8) + 3cos(pi*n/4 + pi/3) But my question is how does one solve such complex trigonometric functions to reach an answer? I don't remember anything beyond the below expansions in trigonometry: (cos(x) - cos(y)) (cos(x) + cos(y)

## Re: Digest Number 683

Hi Pallavi, This is by no means any complex case: period of your discrete function is determined by the longest one of its components,...

Hi Pallavi, This is by no means any complex case: period of your discrete function is determined by the longest one of its components, sin(pi*n/8) and is equal to 16 - due to both sine and cosine are 2*pi periodic functions. Rgds, Andrew > Subject: Solving complex trignometric equations > Posted by: gpallavi2 > Date: Fri Jan 23, 2009 5:01 am ((PST)) > > Hi, > > The problem to b

## Cyclic prefix and Guard period

inHi all members! Thanks for previous questions! Please help me again! In OFDM system, cyclic prefix and guard period issues are used to...

Hi all members! Thanks for previous questions! Please help me again! In OFDM system, cyclic prefix and guard period issues are used to prevent ISI and ICI, if i am right. So, could somebody explains me What is the exact differences between them? (if it is possible deeply please) Thanks in advance! with king regards mashhur!

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