## ANNOUNCE: comp.soft-sys.octave has been created

Started by in comp.dsp16 years ago

The Big-8 Management Board has voted to create comp.soft-syst.octave. The group was created on 12 Jun 2006. NEWSGROUPS LINE:...

The Big-8 Management Board has voted to create comp.soft-syst.octave. The group was created on 12 Jun 2006. NEWSGROUPS LINE: comp.soft-sys.octave GNU Octave, language for numerical computations. CHARTER: comp.soft-sys.octave General GNU Octave questions and its application to specific fields such as digital signal processing, digital communications, medical imaging, et...

## Simple question about calculating difference equation coefficients

Started by in comp.dsp12 years ago 4 replies

In Octave: octave:13> [a,b]=butter(2,0.4); octave:14> a a = 0.206572083826148 0.413144167652296 0.206572083826148 octave:15> ...

In Octave: octave:13> [a,b]=butter(2,0.4); octave:14> a a = 0.206572083826148 0.413144167652296 0.206572083826148 octave:15> [z,p,g]=butter(2,0.4); octave:16> z z = -1 -1 So I can see that the difference equation coefficients are a = [1,2,1]; multiplied by a scaling factor. These correspond to two zeros at -1. But working out the math, I think the difference equation

## Real-time octave analysis

Started by in comp.dsp19 years ago 6 replies

Hello ! I would like to perform ***real-time*** octave analysis with my C54x (100 Mips, audio signal @ 48kHz). Althought i already implement...

Hello ! I would like to perform ***real-time*** octave analysis with my C54x (100 Mips, audio signal @ 48kHz). Althought i already implement FFT, I will do it with IIR filtering. (I know the avantages of FIR decimator, but I dont think it will be usefull in this particular case). The "method" is to apply a band-pass for the higher octave, and decimate by 2 for the next octave. I already ...

## [OT] New GNU Octave group

Started by in comp.dsp16 years ago 28 replies

Dear all!! I was first introduced to GNU Octave through DSP guru. I found it to be wonderful software but I don't think any of us are using...

Dear all!! I was first introduced to GNU Octave through DSP guru. I found it to be wonderful software but I don't think any of us are using it. Most of DSP people seen to use MATLAB. If MATLAB can do it, I think GNU Octave has it all to do it too. People at comp.dsp are great! I have always benefitted from them. I need one little help, please give Octave a try. Lets start improving its s...

## The Dissapearance Act -- Octave

Started by in comp.dsp15 years ago 4 replies

hi all, i am faced with a simple yet intriguing problem. i am running octave 2.1.73. i am trying to multiply two...

hi all, i am faced with a simple yet intriguing problem. i am running octave 2.1.73. i am trying to multiply two matrices (29004 x 120) (120 x 29004) inside a program. octave simply quits when it executes the command. is there anything that i can do. regards, Maverick Mint. ...

## Octave Smoothing

Started by in comp.dsp16 years ago 3 replies

In Matlab, I have a room impulse response. I need to plot a frequency response from 20 to 20k Hz, smoothed to 1/3 and 1/6 octave. I can calculate...

In Matlab, I have a room impulse response. I need to plot a frequency response from 20 to 20k Hz, smoothed to 1/3 and 1/6 octave. I can calculate the ISO octave center frequencies. I see lots of RTA software that does this real-time. Anyone have the Matlab code that does this, or provide the algorithm? Thanks.

## Getting Octave To Parallelize

Started by in comp.dsp13 years ago 2 replies

I'm noticing the Octave isn't utilizing my quad cores. Any suggestions on how to get it to do so? Fedora 11 / Octave 3.0.5 -- Randy Yates ...

I'm noticing the Octave isn't utilizing my quad cores. Any suggestions on how to get it to do so? Fedora 11 / Octave 3.0.5 -- Randy Yates % "Midnight, on the water... Digital Signal Labs % I saw... the ocean's daughter." mailto://yates@ieee.org % 'Can't Get It Out Of My Head' http://www.digitalsignallabs.com % *El Dorado*, Electric Light O...

## Octave or Scilab

Started by in comp.dsp9 years ago 28 replies

Hello people, For designing pulsed shaping and other filters on Windows 7 for Fixed-point MCUs, which is better to download (the latest...

Hello people, For designing pulsed shaping and other filters on Windows 7 for Fixed-point MCUs, which is better to download (the latest version of): Octave or Scilab? And both export to a file the coefficients normalized to the needed format e.g. Qm.n? PS: Octave is claimed to be much more compatible with Matlab. Rony J. _____________________________ Posted through www.DSPR...

## 2nd RFD: comp.soft-sys.octave

Started by in comp.dsp16 years ago

REQUEST FOR DISCUSSION (RFD) unmoderated group comp.soft-sys.octave This is a formal Request For...

REQUEST FOR DISCUSSION (RFD) unmoderated group comp.soft-sys.octave This is a formal Request For Discussion (RFD) for the creation of the unmoderated Usenet newsgroup, comp.soft-sys.octave. Discussion should take place in news.groups; see the PROCEDURE section, below, for more details. NEWSGROUPS LINE: comp.soft-sys.octave GNU Octave, language...

## filter with arbitrary and variable rolloff

Started by in comp.dsp16 years ago 25 replies

Hi, How can I implement a filter (lowpass) with variable slope. 1st order gives me 6db per octave and 2nd order 12db per octave. So what...

Hi, How can I implement a filter (lowpass) with variable slope. 1st order gives me 6db per octave and 2nd order 12db per octave. So what can I do if I need 8db or 4.2db attenuation per octave. Could fractional delay lines instead of unit delays be a starting point? gr. Anton

## Trouble Building Octave

Started by in comp.dsp16 years ago 11 replies

Hi Folks, This is maybe a little off-topic, but I'm hoping someone here has some morsels of knowledge.=20 I'm trying to build and install...

Hi Folks, This is maybe a little off-topic, but I'm hoping someone here has some morsels of knowledge.=20 I'm trying to build and install Octave on my FC4 machine, [root@localhost octave-2.1.72]# uname -a Linux localhost.localdomain 2.6.11-1.1369_FC4 #1 Thu Jun 2 22:55:56 EDT 200= 5 i686 athlon i386 GNU/Linux I've tried both the latest "development" version, 2.9.4, and the "testing...

## Lets put an effort to help John.W.Eaton of Octave Fame

Started by in comp.dsp14 years ago

I know many of you might be using Octave and would have been really loving it for N number of reasons. This brilliant peice of software was...

I know many of you might be using Octave and would have been really loving it for N number of reasons. This brilliant peice of software was well maintained by John and his team. Looks like there are not enough funds to continue the development and support. May I request some rich guys in this community to help John continue with his brilliant efforts on Octave. %----------------- Ma...

## Obtaining 1/3 octave levels from a PSD

Started by in comp.dsp15 years ago 8 replies

hello i am looking for the easiest way to calculate 1/3 octave levels from an acquired signal sampled at a high rate (usually 350kHz). as i...

hello i am looking for the easiest way to calculate 1/3 octave levels from an acquired signal sampled at a high rate (usually 350kHz). as i understand it, the usual method is to create a bunch of butterworth filters and calculate the RMS level in each band, decimating occasionally to increase resolution at lower frequencies. my question is: can the 1/3 octave levels be accurately cal...

## Octave 3

Started by in comp.dsp15 years ago

Despite the appearance of stagnation over the last few years, Octave 3 has been released just in time for Christmas. Let's hope it isn't a...

Despite the appearance of stagnation over the last few years, Octave 3 has been released just in time for Christmas. Let's hope it isn't a turkey. :-) Regards, Steve

## RESULT: comp.soft-sys.octave passes 6-0-2

Started by in comp.dsp16 years ago

RESULT unmoderated group comp.soft-sys.octave passes 6-0-2 The Big-8 Management Board has voted to...

RESULT unmoderated group comp.soft-sys.octave passes 6-0-2 The Big-8 Management Board has voted to create comp.soft-syst.octave. There were 6 YES votes, 0 NO votes, and 2 abstentions/no-votes. Voting began on 08 Jun 2006, and ended on 09 Jun 2006. This group will be created on 12 Jun 2006. NEWSGROUPS LINE: comp.soft-sys.octave GNU Octave,...

## Easy DSP problems to do with GNU Octave

Started by in comp.dsp12 years ago 2 replies

I am about to be a sophomore in college, and I would like to learn about DSP through Octave. I know very little java and C++. I didn't finish...

I am about to be a sophomore in college, and I would like to learn about DSP through Octave. I know very little java and C++. I didn't finish math in college yet, so I would like to do some VERY BASIC and EASY DSP problems in Octave. I would appreciate any kind of suggestions. Thank you.

## Getting Octave to Multi-core/Parallel Process

Started by in comp.dsp13 years ago 5 replies

I'm noticing that Octave doesn't utilize my new multicore CPU. Has anyone been successful in doing so? I'd appreciate any hints or...

I'm noticing that Octave doesn't utilize my new multicore CPU. Has anyone been successful in doing so? I'd appreciate any hints or tricks. @GNU Octave, version 3.0.5 Linux localhost.localdomain 2.6.29.6-217.2.16.fc11.x86_64 #1 SMP Mon Aug 24 17:17:40 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux -- Randy Yates % "How's life on earth? Digital Signal Labs % .....

## octave wavwrite() problems

Started by in comp.dsp15 years ago

Hi Folks, The octave newsgroup seems pretty dead, so I'm trying here. I'm using octave 2.9.9 on [yates@localhost inp]\$ uname -a Linux...

Hi Folks, The octave newsgroup seems pretty dead, so I'm trying here. I'm using octave 2.9.9 on [yates@localhost inp]\$ uname -a Linux localhost.localdomain 2.6.20-1.2948.fc6 #1 SMP Fri Apr 27 19:18:54 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux and I'm experiencing two problems with wavwrite(): 1. The parameter order changed between version 2.9.8 and 2.9.9. This is not really a p...

## Time-Domain, FFT, and Octave (and 1/3 Octave) band analysis

Started by in comp.dsp18 years ago 5 replies

Hi, I'm looking to recreate an audio environment for a flight simulator. I've been supplied with a document that contains different flight...

Hi, I'm looking to recreate an audio environment for a flight simulator. I've been supplied with a document that contains different flight conditions (eg, plane at idle, plane during takeoff, climb from 15000 to 35000ft, etc) as well as the location (in the plane) of the recorders for these conditions. This document also contains an Octave band (or narrow band, depending on the condition)...

## Is octave good to do image processing?

Started by in comp.dsp14 years ago 10 replies

Hello All, I found octave to be good for signal processing applications. But is octave good for doing image processing too? The...

Hello All, I found octave to be good for signal processing applications. But is octave good for doing image processing too? The reason why I am asking this, is sometimes back I was using scilab for image processing applications. when I ventured more in depth I found it to be dead slow for processing large amounts of data, and specially if there were any ...