<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">2015-04-30 11:24 GMT+02:00 ORL <span dir="ltr"><<a href="mailto:orl@ammd.net" target="_blank">orl@ammd.net</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi!<br>
<br>
I already told you about Sebkha-Chott several times on this list,
usually speaking about our releases (always under GNU/Linux, from
the beginning to the end).<br>
<br>
Actually, Sebkha-Chott also uses GNU/Linux on stage to manage sound,
lights and video of the whole show (see details below).<br>
I usually don't post shows list or tour schedule here (maybe I
should), but this time it's a big and international festival, so it
might be that some of you will be interested in it.<br>
<br>
So Sebkha-Chott will play at Brutal Assault Festival #20 in Jaromer
(Cz), for the third time, but for the first time, we will use the
GNU/Linux live setup they have on tour. The final schedule is not
known yet, but it will be between 5th and 8th of August. If some of
you live near Cz, are metalheads, that's the place you should be (if
you ask me, this year's line-up is really great, the best I've known
since I know this festival).<br>
<br>
<a href="http://www.sebkhachott.net/15-years-of-sebkha-chott-kourt" target="_blank">http://www.sebkhachott.net/15-years-of-sebkha-chott-kourt</a><br>
<br>
Here it is (please note the video and lights part of the system
won't probably play at Brutal Assault due to very tight changeover
schedule).<br>
<br>
<br>
<b>Description of Sebkha-Chott's live setup</b><br>
<br>
<b>Distribution</b><br>
All machines, including RPI, are running Debian systems, mostly
Jessie.<br>
<a href="http://www.debian.org" target="_blank">http://www.debian.org</a><br>
<br>
<b>Session Handling</b><br>
Session handling is managed through ladish and on some control
machine small shell scripts.<br>
<a href="http://ladish.org" target="_blank">http://ladish.org</a><br>
<br>
<b>Audio</b><br>
<i>Routing</i><br>
All the routing is managed through ladish, jack is configured with
the restrict self-connect option.<br>
<br>
<i>Mixing</i><br>
The mixing/processing of any audio signals coming from the
instruments on stage or from "virtual sources" inside the machines
(synths, samplers) is done through a bunch of Non-Mixer (probably
not uptodate) instances, running independently one from the other.
All these Non-Mixers finally ends up in the FOH mix or on of the
three monitors mix (which goes to in-ear monitors system). We highly
recommend Non-Mixer for this type of setup, as you don't need a
timeline, and Non-Mixer is really lightweighted, OSC controllable,
and flexible. Ecasound might have done the job too, still.<br>
<a href="http://non-mixer.tuxfamily.org/" target="_blank">http://non-mixer.tuxfamily.org/</a><br>
<br>
<i>Live Looping</i><br>
The "instrumental line-up" contains 2 basses, 2 guitars, 3 vocals
and a drumkit, each of them goes to a single looper (for the drums,
we only loop a stereo submix). We use Sooperlooper (probably not
uptodate, and (uglily) patched so that Jack Transport
Synchronization with SL as a master works with it and is recalled
when at session load).<br>
<a href="http://essej.net/sooperlooper/" target="_blank">http://essej.net/sooperlooper/</a><br>
<br>
<i>Synths</i><br>
Additionnally to the physical instruments, 5 synths are running, 3
of them polyphonic, 2 of them monophonic. We use Alsa Modular Synth
(probably no uptodate) for this. You might get the patches on github
(see below)<br>
<a href="http://alsamodular.sourceforge.net/" target="_blank">http://alsamodular.sourceforge.net/</a><br>
<br>
<i>Samplers</i><br>
A virtual drumkit is also used, with really-non-drumistic sounds. We
use tapeutape (patched not uptodate version) for this purpose.<br>
<a href="http://hitmuri.net/index.php/Software/Tapeutape" target="_blank">http://hitmuri.net/index.php/Software/Tapeutape</a><br>
<br>
<i>Clic</i><br>
We use Klick to send clic in every monitor.<br>
<a href="https://github.com/dsacre/klick" target="_blank">https://github.com/dsacre/klick</a><br>
<br>
<b>Lights</b><br>
Lights are controlled using QLC+. We use four profiles projectors
and 4 LED "barres", which are split into 8 RGB segments each, each
segment mightbe controlled independently from the others.<br>
<a href="http://qlcplus.sourceforge.net/" target="_blank">http://qlcplus.sourceforge.net/</a><br>
<br>
<b>Video</b><b>s</b><br>
Videos and Moving images are displayed on three V-form screens.
Those videos are displayed using a self-developped software called
PytaVSL (derivating from VSL, a set of pd patches we used on a
children show) and based on Pi3D. This runs on RPIs (old ones, not
the big beasts you might get for 30$!!!).<br>
This lays on a mapped-layers principle, each of them might be mapped
with images or videos, the content can be changed with OSC control,
and you can move or change properties (including
visibility/inivisibility) of a layer using OSC too.<br>
By now, PytaVSL is not recommended for anyone except us (or you will
have to put your hands in it, and you'll see then we're no real
devs!!!).<br>
<a href="https://github.com/orlammd/pytaVSL" target="_blank">https://github.com/orlammd/pytaVSL</a><br>
<a href="https://github.com/tipam/pi3d" target="_blank">https://github.com/tipam/pi3d</a><br>
<br>
<b>Controls</b><br>
<i>MIDI/OSC Routing</i><br>
The whole thing is controlled via a centralized OSC/Midi router. We
use Mididings for this purpose, and we highly recommend it, it's a
really good piece of software which makes everything possible in
such a setup.<br>
The version we used has been patched to be able to
route/filter/manage OSC messages too. I propose this dirty patch to
Dominic and I know he has worked on this, but I couldn't tell what's
the current state of the software, as we do not use an uptodate
version on this neither!<br>
<br>
<i>PedalBoards</i><br>
We use DIY pedalboards to trig the sequencers, loopers, and to
change instruments sounds (including synths). These pedalboards are
made of a "règle de maçon", push-buttons and a Teensy2.0
programmation board. It basically sends an OSC message
/pedalBoard/button #number when you press a button. These messages
are then managed by Mididings. There are two pieces of software for
this, one on the board, one on the receiving computer.<br>
<a href="https://github.com/AMMD/Poly_PedalBoard" target="_blank">https://github.com/AMMD/Poly_PedalBoard</a><br>
<br>
<i>Touchscreen Interfaces</i><br>
All the mixers, the LASDPA plugs, and in some case the synths are
controlled using touchscreen interfaces. We've developped a programm
for this purpose called Ghislame. Initially developped in C++/Fltk,
we ported it to python/kivy and finally it now uses a JS engine.
Initial versions controlled more things (loopers, synths, mixers,
lights), but in a quite weighted way. Current version (JS) only
controls Mixers and Plugs, but does it much more fluently.<br>
One of these touchscreen interfaces is placed at FOH, so that mix of
the show might be done from FOH. The other ones are sprayed on stage
so that musicians might control their monitoring and some other
things easily.<br>
<a href="https://github.com/jean-emmanuel/oschtmlgui" target="_blank">https://github.com/jean-emmanuel/oschtmlgui</a><br>
<a href="https://github.com/AMMD/kvGhislame" target="_blank">https://github.com/AMMD/kvGhislame</a><br>
<a href="https://github.com/AMMD/Ghislame" target="_blank">https://github.com/AMMD/Ghislame</a><br>
<br>
<i>Visual Monitoring</i><br>
Several small laptops are placed on stage with LiveDings (Mididings
frontend) and slgui (SooperLooper GUI) running on them.<br>
<br>
<b>Sequencers</b><br>
<i>Midi Sequencing</i><br>
seq24 in a really really patched version is used to sequence MIDI.
It's used in matricial mode, and the patches we've done acts on many
things: arbitrary number of beats in a measure, abitrary number of
measures in a sequence, n-tuples, 16x13 matrix (instead of 8x2),
play/stop controllable by Program Changes, and other crappy things.
I really don't recommend our patched version which contains many
bugs we learned to prevent! It's the very first software we've been
patching, and.... wel.... seq24 is synced to Jack Transport as a
slave. As far as I know this doesn't work anymore with more recent
version of seq24, and as a result, our version is not uptodate. We
will certainly change about this when we'll have time. We attend
much from Non-Sequencer on that point! ;)<br>
<br>
<i>OSC Sequencing</i><br>
Over the Midi Sequencing, OSC sequencers are running. One controls
the lights, one controls the videos, another one might send messages
to audio machines (including seq24), and one runs over them all and
might send the BIG SEQUENCE messages!<br>
We use a self-developped software called pyOSCseq. This sequencer
can run looped sequence (as any other sequencer) but also can send
on-shots sequence (many uses in theater context).<br>
<a href="https://github.com/jean-emmanuel/pyOSCseq" target="_blank">https://github.com/jean-emmanuel/pyOSCseq</a><br>
<br>
<i>Jack Transport</i><br>
Jack Transport is used to synchronize every tempi/triggers and so
on. Sooperlooper is Jack Timebase Master, and the other pieces of
software that might be sync to are slaves. Considering that
Sebkha-Chott'music is composed of many sequences in many metrics and
tempis, with highly contrasted way of passing from one to the other,
this point was a very critical point at the beginning of our work
with machines (in 2008).<span class="HOEnZb"><font color="#888888"><br>
<br>
<pre cols="72">--
ORL
AMMD - Freak & Free Arts Coo[r]p
<a href="http://www.ammd.net" target="_blank">www.ammd.net</a> - 095 234 72 48</pre>
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<br></blockquote></div><br></div><div class="gmail_extra">Really good and useful info for reference. Great to see real musician using FLOSS in production and in such kind of festivals.<br></div><div class="gmail_extra">Would be great to see some "behind the scenes" footage of your performance.<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">Thanks for sharing.<br clear="all"></div><div class="gmail_extra"><br>-- <br><div class="gmail_signature"><br>C. sanchiavedraZ:<br>* NEW / NUEVO: <a href="http://www.sanchiavedraZ.com" target="_blank">www.sanchiavedraZ.com</a><br>* Musix GNU+Linux: <a href="http://www.musix.es" target="_blank">www.musix.es</a></div>
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