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Discussion Groups | Audio Signal Processing

Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).

  

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Waterfall windowing problems   [2 Articles]
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elvi...@hotmail.com - Oct 7 2008
Dears, I am writing a program to make the waterfall plot, but have some doubt. Can you help? 1. I am using square window, is it correct? 2. Shall I keep the window size or... Waterfall windowing problems

FIR filter on C6713
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sven...@ymail.com - Oct 6 2008
Hi I am implementing a FIR filter on a TI DSK6713 for real-time audio processing. My code i written in C and based on dsk_app.c which comes with Code Composer. This code uses 4 buf... FIR filter on C6713

FFT output interpretation (FFTW v. Ooura)   [15 Articles]
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rela...@hotmail.co.uk - Oct 6 2008
I'm new(ish) to FFT and to broaden my knowledge/experience I've been comparing FFTW and the Ooura FFT library. I'm getting a result with the latter that I don't quite understand, h... FFT output interpretation (FFTW v. Ooura)

Considerations about low pass FIR filter order
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ÓÀÒ» Îâ - Oct 6 2008
hi, I remember there is a suggestion to use even order low pass FIR filters instead of odd ones. But I'm not sure and can't remember where I got this information. The only reas... Considerations about low pass FIR filter order

Basic Algorithm/formula to convert mic db output to db SPL   [3 Articles]
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jsnuff1 - Sep 30 2008
I have a mic that outputs its level in decibels (the range this mic outputs seems to be between around -55db to 0db) and would like to find an algorithm that converts this value ... Basic Algorithm/formula to convert mic db output to db SPL

Is there such a thing as a simple DSP?
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George Bean - Sep 25 2008
I have an application to decode an FSK signal on a VHF carrier. In the past I would have used an EXAR XR2211A FSK demodulator chip feeding a microcontroller but I assume with the... Is there such a thing as a simple DSP?

Spectrum of target's varying speed
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sauw...@gmail.com - Sep 23 2008
Hi all, This is more of a theoretical question, since I have much to learn about acoustics. How does a spectrum behave when a target (ex. car, plane) is evaluated at different ... Spectrum of target's varying speed

Octave band-fft
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sumandari - - Sep 14 2008
Hi, im newbie sorry for my bad english how to get octave band spectrum from fft spectrum without using filter. Can i just average the freq in each bandwidth? Thankyou -- Re... Octave band-fft

Mixing down from multiple input sources   [5 Articles]
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"d.abc51" - Sep 13 2008
Hi all, I'm trying to code a program that can mix together multiple PCM wav files into a single output. It is essentially a sequencer, and works fine at points in the sequence wh... Mixing down from multiple input sources

codecs and file format   [6 Articles]
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kaus...@yahoo.com - Sep 13 2008
Hello everybody, -I often get confused between an audio codec and an audio file format. Doesnt a .mp3 extension necessarily mean that the file has been encoded using 'mp3' encodin... codecs and file format
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