Massimo Barbieri | 30 Jul 12:08 2014

[LAU] John Option: new song and new Adrour project

today we have published the video of another single of John Option: You
fill my soul. Of course the song is published under the terms of the
Creative Commons License (CC-BY-SA) and it's completely produced only
with free software: Ardour, Hydrogen, Jack, Qsynth, CALF, and many other
great free audio software that we used under Debian GNU/Linux.

Here you can listen the single:

As for the previous song we have done a little more in the direction of
freedom and we published in our website[1] the single recording tracks
and the complete Ardour session. All this material is published under
the terms of the Creative Commons license Attribution Share alike so
that anyone can use our tracks to produce a remix of our song or even a
new song that have to be published under the same license.

You can find all about our project here:

I hope that you like our choice of freedom. If you feel like I'd love
to read your feedback, because the encouragement of the people who
listen to us and appreciate the philosophy of our project is the only fuel
for us to continue. And if you like to be updated about our next
release, please subscribe to our YouTube channel or any other social
network you like (see link to our profiles on our website[1]).

Best regards,


(Continue reading)

[LAU] Slowing down audio while keeping same pitch ?

Is it possible to slow down an audio file (mp3 for instance) while
keeping the same pitch ?  Does it even make sense ?  The software would
have to insert more of the same audio 'bits' to make it last longer.
Is it possible ?

Carlos sanchiavedraz | 28 Jul 20:31 2014

Re: [LAU] VJ / VeeJing software alternatives

2014-07-18 20:35 GMT+02:00 Michal Seta <mis <at>>:
> Recently I stumbled upon this thing:
> MichaƂ

Had some time to try to compile it, and after a while I succeeded
(inside Musix3=Debian Wheezy, and Ubuntu 12.04).

Really good looking, the workflow is a little different from the
normal kind of launch-sampler screens and such, but really
interesting. If you are familiarized with tools that are present in
video or image editors (Align, Crop, Stretch, Rotate) you get an idea
of it to make some quick demos.

The only problem is that after a while working with it, video-loops
started to get stuck and if you restarted again GTmixer you got an
error, and you had to restart session (or do some investigations to
see what thread to kill to prevent this) to be able to work again on
it. It perhaps is due to running it at the same time with some other
audio programs and Jack, but not clear yet.

Anyway, really interesting application. I'm working on it.

> On Fri, Jul 18, 2014 at 1:23 PM, Carlos sanchiavedraz <csanchezgs <at>>
> wrote:
(Continue reading)

Kaza Kore | 26 Jul 20:14 2014

[LAU] Installing VJPirate error

<!-- .ExternalClass .ecxhmmessage P { padding:0px; } .ExternalClass body.ecxhmmessage { font-size:12pt; font-family:Calibri; } -->

I tried to compile VJPirate and get his message. Originally had a missing fltk message but managed to work out what to install to clear that easily. This is more confusing to me though, as I know I have Jack and obviously I have ALSA.

Using Ubuntu Studio 12.04 although I do also have the KXStudio repositories enabled, which I sometimes wonder causes a bit of confusion...

$ scons
scons: Reading SConscript files ...
Checking for g++...yes
Checking for C header file jack/jack.h... yes
Checking for C header file alsa/asoundlib.h... yes
Checking for C library xml2... yes
Checking for C header file xtract/libxtract.h... yes
Checking for C header file X11/xpm.h... yes
Checking for C header file X11/Xlib.h... yes
Checking for C library png... yes
Checking for C library jpeg... yes
Checking for C header file aubio/aubio.h... yes
Checking for fltk-config...yes
Package libxml-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libxml-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libxml-2.0' found
Package alsa was not found in the pkg-config search path.
Perhaps you should add the directory containing `alsa.pc'
to the PKG_CONFIG_PATH environment variable
No package 'alsa' found
Package jack was not found in the pkg-config search path.
Perhaps you should add the directory containing `jack.pc'
to the PKG_CONFIG_PATH environment variable
No package 'jack' found
Package aubio was not found in the pkg-config search path.
Perhaps you should add the directory containing `aubio.pc'
to the PKG_CONFIG_PATH environment variable
No package 'aubio' found
OSError: 'pkg-config --libs --cflags libxml-2.0 alsa jack aubio' exited 1:
  File "/home/dale/Downloads/debs/vjpirate-0.0.1/SConstruct", line 88:
    env.ParseConfig('pkg-config --libs --cflags libxml-2.0 alsa jack aubio')
  File "/usr/lib/scons/SCons/", line 1551:
    return function(self, self.backtick(command))
  File "/usr/lib/scons/SCons/", line 593:
    raise OSError("'%s' exited %d" % (command, status))

> From:
> Date: Sat, 19 Jul 2014 13:47:50 +0200
> To:
> CC: linux-audio-user <at>
> Subject: Re: [LAU] VJ / VeeJing software alternatives
> 2014-07-19 13:13 GMT+02:00 Florent Berthaut <>:
> > On 18/07/14 18:23, Carlos sanchiavedraz wrote:
> >>
> >>
> >> BTW, I've realized your web, IIRC, You had Freewheeling
> >> videos jamming and livelooping with an electronic drumkit long time
> >> ago, Were you?
> >
> >
> > yep, a long time ago ;-)
> >
> >
> >> I enjoyed them very much.
> >
> > Thanks
> >
> >
> >> Freewheeling always have been
> >> my favourite livelooper, but lately I'm using sooperlooper because you
> >> can run it without X on a Raspberry PI, and it seems FW can't (I'm
> >> sure there is a way, but didn't researched it yet).
> >>
> >> It seems somebody in the FW is reviving it. It would be great.
> >
> >
> >
> > That would be nice indeed, i've stopped using it and build my own looper
> > instead, but i borrowed a lot of ideas from it.
> I guess that's VJPirate, right?
> > The gui was really interesting, it would have been nice to try to project it
> > directly onto the controller, having the loops displayed on the keys/pads
> > ...
> >
> That would be great, and having FW in a touch interface. I achieved
> this one time on some touch device (not mobile/tablet on those days
> yet) where I managed to put Musix into it and just touch buttons with
> fingers while jamming, that was very easy and intuitive way.
> Now I'm trying something in that way but with mobile devices and
> tablets, but audio stuff and drivers on devices with
> Android/FirefoxOS/something with Linux is a nightmare yet. But it
> seems it's getting better with some future changes related to USB
> audio.
> > florent
> >
> > --
> >
> >
> --
> C. sanchiavedraZ:
> * NEW / NUEVO:
> * Musix GNU+Linux:
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user-cunTk1MwBs/CEJeg2xFRV+G/Ez6ZCGd0@public.gmane.orgorg
Linux-audio-user mailing list
Ken Restivo | 26 Jul 19:42 2014

[LAU] JACK on Pi... almost working

I was playing around with trying to use a Pi as a synth.

So far so good except for two problems:

1) I've run into this:
    But I'm already using  jackd2_1.9.8~dfsg.4+20120529git007cdc37-5+fixed1~raspbian1_armhf.deb
    which supposedly has Dbus removed/excised/banished/purged/kicked-to-the-curb.
    And yet, no dice, same error. Haven't had time to investigate it yet.
    I went back to jackd1 (wow, it's like it's 2007 all over again).

2) The sound coming out of either the built-in audio or an external C-Media USB interface
   is cracking and nasty, with obvious aliasing distortion. Any ideas why? I've tried
   44.1k and 48k. No xruns tho, which is nice, at 44100/512/3 using jackd1 and fluidsynth. 

I've got it overclocked to 1Ghz, all is well with that (ran the self-test), and
using the performance guv'na.

I haven't tried with my FastTrack Pro yet because the Pi can't power it at the
same time as a MIDI keyboard, and a working power cube for the keyboard has gone missing.

The crackling/aliased sound is the big stumbling block though. Any ideas?

Carlos sanchiavedraz | 26 Jul 17:08 2014

[LAU] Testing VJPirate, Was:Re: VJ / VeeJing software alternatives

Hello again, Florent. (Keep the list on CC FWIW).

I managed to guess the libraries needed to compile VJpirate with
scons, as it says in the web, but I've come to a dead end, or so it
seems. Maybe it rings a bell on you, It says something libxtract.h. No
such file or directory" but can't find which lib is required for
libxtract; nothing in repos related.

Compiling info:
Checking for fltk-config...yes
scons: done reading SConscript files.
scons: Building targets ...
Compiling src/audio/AnalysisManager.o
In file included from src/audio/AnalysisManager.cpp:24:0:
src/audio/AnalysisManager.hpp:35:30: fatal error: xtract/libxtract.h:
No such file or directory
compilation terminated.
scons: *** [src/audio/AnalysisManager.o] Error 1
scons: building terminated because of errors.

Thanks in advance.

2014-07-18 13:20 GMT+02:00 Florent Berthaut <florent@...>:
> On 18/07/14 11:54, Carlos sanchiavedraz wrote:
>> Hello dear all.
>> Any suggestions or experiences?
>> Thanks as always.
> Hi Carlos,
> I have been developing a VJiing software for a while, called VJPirate
> (
> It still needs a lot of rewriting and redesigning on the interface side but
> is usable and has been used for quite a while by a friend i am playing with
> (you can see some example of live perfs where the visuals are done with
> VjPirate on
> It works on GNU/Linux and MacOSX.
> It is based on the principle of grids of images / shapes with parameters,
> and you can define patterns of scales for the parameters so that a change in
> the parameter impacts the whole grid. Everything can be MIDI, Audio and OSC
> controlled. You can extract different features from the audio (loudness,
> brightness, onsets ...) and use them to control visual parameters.
> If you want to try it, you should grab the development branch (called mac
> but it works on linux) on:
> Let me know if you have any questions.
> Regards,
> Florent
> --
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@...



C. sanchiavedraZ:
* Musix GNU+Linux:
F. Silvain | 26 Jul 12:52 2014

[LAU] OT: new free soundset for DSI Prophet 12

Hey hey,
not sure, if this is welcome, but I just uploaded a new free soundset for the 
DSI Prophet 12 hybrid synthesizer. It's a superb hardware instrument. Feel 
free to pass the links along!

The first is a revision of the already existing soundset on my website. Both 
soundsets now upload to any of the 8 soundbanks of the Prophet 12.

Enjoy and nice weekend!

* Internet:
Fede | 26 Jul 01:04 2014

Re: [LAU] music software for kids

 And the due on topic reply:



Fede <federicogalland@...>
Brian Sorahan | 25 Jul 23:17 2014

[LAU] music software for kids

Hi all,

Are there any music applications for linux that would be suitable for a 10 year old to sit down and have fun without reading any documentation? (i.e. something as simple as Mario Paint Composer, which I played with and loved as a child)
I've scanned the list at and googled but nothing is jumping out at me.

Brian Sorahan
Linux-audio-user mailing list
James Stone | 25 Jul 12:05 2014

[LAU] jack performance in ubuntustudio

I've just done some quick testing of AVLinux vs. Ubuntustudio, and the
performance of jackd is significantly worse on ubuntustudio..

On AVLinux, I can start up jack (0.121.3) with 32 frames, and CPU runs
around 3%. On Ubuntu (jackd 1.9.10), I am getting 30%+ with the same

Checking top, I am getting pulseaudio at 30% and jackdbus at 20%..
Killing pulseaudio, jackdbus goes down to 13%, but this is still
significantly worse than avlinux..

I'm wondering if it is due to differences in new vs. old jack, or if
there is something else I can tweak?

Russell Hanaghan | 24 Jul 20:18 2014

[LAU] Kxstudio RT kernel vs low latency


Is anyone achieving significant audio latency gains or xrun stability using a RT kernel with Kxstudio or
similar Ubuntu studio distro's? 

If so, which kernel / where /do I gotta roll my own?


~ Russell