Linux apps useful for speaker/amplifier analsys

[garlandstephens]

excellent work anli

This looks like a very useful addition to the toolbox. Thanks for the great work.

BTW, it took a good bit of work to figure out how to compile this, but it looks worth it. Key is setting and export LD_LIBRARY_PATH to the appropriate path for qwt.

 

[heater]

A couple of questions:

1. Before I invest many hours getting Qloud compiled and installed on my Gentoo linux box is there any chance that it will run on my ancient AMD 266MHz machine ?

2. Any recomendations for a good sound card under Linux with ALSA and JACK ? Perhaps something external and USB.

I have been using an old Sound Blaster Live for a long time but an upgrade to recent kernels and ALSA don't work at all well, lots of glitches. These are described by the baudline guys here: http://www.baudline.com/solutions/full_duplex/sb_live/index.html

 

[anli]

garlandstephens,

Every distributive has it's own rules

heater,

I have no chance to try the app at such ancient PC. At any case, I'd recommend at least 256MB of RAM and not to use very long excitation signsl (say, not above 7 seconds).

As for installing - look at http://forums.gentoo.org/viewtopic-t-427211.html
QLoud is included to this 'proaudio' portage overlay.

As for sound card - I hate all Creative cards But I think any card will be sufficient. You will be able to test a card itself. To be sure a card is supported I'd suggest to use alsa-user mailing list.

 

[garlandstephens]

every distro has its own rules

understood - I'm not faulting you.

I have not used Qt very much, and I think my issues came from qmake not doing everything it is supposed to do for qwt.

 

[garlandstephens]

sound card

RME multiface is absolutely killer on linux. They are often on ebay. Worth the price.

 

[garlandstephens]

feature requests

Anli-

Here are some thoughts for additional features for your very useful program:

1) 2nd channel record so that one can be used as a loopback reference channel for use with DRC

2) data outputs of the analyses in the graphs, so that they can be used as input for Octave or a spreadsheet

These are not criticisms - the program is very useful already.

 

[anli]

garlandstephens,

My English isn't perfect , I have not understood your suggestion concerning second record channel. All intermediate files are saved in working directory: last excitation, last inverse filter, last system response. As well as "more permanent" results: IR and last trimmed (time-gated) IR. All files have standard WAV float32 format.

Speaking more generally, as a common case in the open source software world, features are dictated by my own current DIY-ing needs. Now, I'm thinking about mic calibration file and treating (plotting) a measurement as impedance. You see, one hand takes a solderer, while anoher one - a mouse

And ... thanks for kind words!

 

[anli]

Fons Adriaensen has released alpha version of Aliki:

http://users.skynet.be/solaris/linuxaudio/

 

[simple simon]

How to use baudline

I am having trouble loading the website so I'll have to try it again later. I use Baudline myself and find it to be a very nice program. It works through OSS.

Picking up on an old thread.

I'm trying to use baudline for speaker testing/measurement but finding it hard going. The manuals and the examples all start too deep. I just dont "get" how to use it.

Any tips?

Thanks,

Simple