[LAU] speaker frequency response measurement and display

Benoît Rouits brouits at free.fr
Sun Jun 26 11:40:03 UTC 2016

Hello Gerhard,

I could compile and run it flawlessly.

I think you installed a wrong version of lib Qwt, you need Qwt6 compiled 
against Qt4.

Qwt comes with at least two versions (sometimes 4!) depending on your 
distro. I'm using also another program that needs Qwt6, linked against 
Qt5 though, so have more pkgs installed:

headers files:
ii libqwt-dev      6.1.2-5 NEEDED
ii libqwt-headers  6.1.2-5 NEEDED
ii libqwt-qt5-dev  6.1.2-5 (not needed for qloud)

library files:
ii  libqwt-qt5-6   6.1.2-5 (not needed for qloud)
ii  libqwt6abi1    6.1.2-5 (i don't know wth is it)

Hope this helps.
- Ben

Le 25/06/2016 14:35, Gerhard Zintel a écrit :
> On Sat 25 June 2016, Ben Rouits wrote:
>>> I want to display the frequency response (amplitude, impedance and
>>> maybe phase) of my self-build speakers on my homepage. I like the
>> I am using qloud to do that. it compiles over Qt4, Qwt and jackd.
>> sources are available at http://gaydenko.com/qloud/
> Hi Ben,
> thanks for the hint. I just tried to compile qloud myself and failed
> with message:
> ----------- snip ------------------
> ExcitForm.cpp:98:20: error: ‘class QwtCounter’ has no member
> named ‘setSingleStep’
>       this->fMinCnt->setSingleStep(1);
>                      ^
> ExcitForm.cpp:119:20: error: ‘class QwtCounter’ has no member
> named ‘setSingleStep’
>       this->fMaxCnt->setSingleStep(1);
> ----------- snip ------------------
> Have you been able to compile latest version (1.0) without problems?
> I've installed all the mandatory development packages so far. I might
> have to contact the author.
> Thanks
> Gerhard
> <small rant>
> I love Linux a lot and are exclusively using it for 15 years now - but
> it's a real pity that you can not launch old executables at all later
> distributions easily. Otherwise authors could offer a binary
> additionally to the sources that would save possible users a lot of
> headaches. In Windows mostly all old *.exe programs from XP area are
> running fine under Win7 or above and if you try to get the latest
> e.g. gnuplot versions running (fill in program of your choice) that
> is not yet in your distribution it's much more easy for a Windows
> user to do so as executables are available than for a Linux user..
> <\rant>
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