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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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NMWT in MPEG4 AAC LTP profile

brightjo_2000 - Mar 21 2005
Hi All, I would like to know whether non meaningful window_sequence transition is allowed in LTP profile? If not why? Can anyone send links regarding this material? Thanks i... NMWT in MPEG4 AAC LTP profile

Filter Order in Analog and Digital   [10 Articles]

glid...@hotmail.com - Mar 21 2005
Hi, Is the order of a Digital filter the same as of an Analog filter?? If not why?? How do I go about designing a Digital filter for a Linkwitz Riley, 4th order (24db/octave... Filter Order in Analog and Digital

Audio Processing - why Subband?

Yan Li - Mar 17 2005
Hi, all I believe this is a very basic and old question. I know there are a number of advantages of subband processing. Here I'd like to ask for your opinions of why subband i... Audio Processing - why Subband?

Paynter Filter Pole Locations

larkjon - Mar 15 2005
I'm interested in equations for the pole locations of the Paynter filter. The publication "The Lightning Empericist" has the equations for the even order Paynter filter pole... Paynter Filter Pole Locations

help regarding aac lc encoder

sudeep hegde - Mar 11 2005
Hi All, I have some doubts regarding quality issues in mpeg4 aac lc encoder. 1) does aac lc encoder gives tranparent quality at 96kbps or less for an audio of 48kHz stereo. ... help regarding aac lc encoder

FFT's   [5 Articles]

John Skurka - Mar 3 2005
Hey all: I'm a newbie here, and have a FFT related question. Some background first. I've written a VB program that takes an FFT of a time function comprised of fixed puls... FFT's

adpcm, distortion, and dithering

Harland Christofferson - Mar 3 2005
We're using the Intel/DVI ADPCM algorithm. It works well but it distorts the audio beyond our specifications (greater than 7% THD+N for frequencies greater than 2KHz). I a... adpcm, distortion, and dithering

How to design an IIR filter using slope(db/oct) information   [5 Articles]

care...@rediffmail.com - Mar 3 2005
Topic : To design an IIR HPF filter using IPP(Intel Integrated Performance Primitives) library. Current need: to calculate BW or Q from slope. The specification of filter is :... How to design an IIR filter using slope(db/oct) information

FFT Sample Data - Whats wrong with this ??   [6 Articles]

ShadowsEdge Admin - Feb 28 2005
Greetings, Here is a sample of the kind of data I've been getting. This kind of result is common to all the FFT routines I have tried. The fact that I have tried 3 different... FFT Sample Data - Whats wrong with this ??

Impulse Testing the FFT   [13 Articles]

ShadowsEdge Admin - Feb 27 2005
Greetings, I have been experimenting with several FFT routines and none of them seem to work like they are supposed to. From what I understand of the theory, an impulse in th... Impulse Testing the FFT
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