Hi everybody,
Fallowing up the long discussion i'm trying to sort of give the
information you all seem to be missing.
there was a meantion of this, but not too many of you have paid any
attention:
here you can find an article about the current status of the protocol mess:
http://prosoundnewseurope.com/pdf/PSNLive/PSNLive_2009.pdf (page 28)
obviously eas50 is good to go, but Ethernet AVB is right thing really.
the only thing that it's still work in progress, but many of the
proprietary vendors, which already have their own networking solution
(like Harman with HiQ-net, the one i can name of top of my head)
are involved in AVB stadard deveelopment.
The idea of AVB is to bypass the IP layer, which is right thing really.
you don't need to assign IPs to your audio nodes, really!
in avb you'd just have to select channels that nodes whant to listen to.
there is a fair bit of documentation on the ietf.org AVB group's page.
but XMOS is looking to be the best point of refference:
http://www.xmos.com/news/15-jun-2009/xmos-simplifies-ethernet-avb-implement…
is think we should forget everything else and crack on with the XS1 AVB
implementation!
their XS1 chips seem to be really great,
their are basically every innovative and open-source minded.
the official toolchain is LLVM-GCC based.
you can use C, C++ or their own XC.
XC is basically C with some stuff omited (like goto and floats)
and XMOS IO stuff added, don't just say WTF, look at it first!
you should also watch the videos here:
http://www.xmoslinkers.org/conference-online-wf
especialy the two about the "XMOS Architecture" and the AVB
presentation.
some dev-kits are quite expencive, but that's due to low-volume really
;)
there is alos a nice USB Audio kit!
plus there is alittle board that is cheap and has two RJ45's on it
already :)
I'm myself studying the XC book at the moment. And geting familiar with
the tool set :)~~
looks very exciting, cause these are the invovative chips!
ok, may be an FPU is really missing on XCore, but how many DSPs have
it anyway? well quite a few, but there was no FPU on dsps for ages! :))
also XC or C/C++ are so much more obvious then the bloody "menthal american military engeneers non-sense" called HDL-whatever!
Cheers Everyone,
Hope you will appreciate my excitment :)~ (l0l)
--
ilya .d
Dear Linux Audio developer, user, composer, musician, philosopher
and anyone else interested, you are invited to the...
Linux Audio Conference 2010
The conference about Open Source Software for music and audio
May 1-4 2010
Hogeschool voor de Kunsten Utrecht (HKU)
Utrecht, The Netherlands
Registration is open, and so is the call for abstracts and papers.
More information can be found on the website:
http://lac.linuxaudio.org/2010
For previous editions, look here:
http://lac.linuxaudio.org
For concerts, music and workshops a submission system and protocol will
be available soon. In the meantime, ideas and announcements can be sent by
e-mail ("lac -at- linuxaudio -dot- org ")
or written on the wiki:
http://wiki.linuxaudio.org/lac2010
We hope to see you all in Utrecht !
Kind regards on behalf of the LAC team,
Marc Groenewegen, lecturer music software design @ HKU
After recent discussion on IRC I'm loosing faith in whether it is worth
to contribute to linux audio session handling/management. Two reasons
were given why it does not get testing from users. One is that what I
did so far is not mature, has annoying bugs and I'm not wanting to fix
them. The other one is that ladish is not giving more than users already
have with qjackctl. Also it was mentioned that D-Bus is not what users
find acceptable for controlling jack server.
Given the almost missing feedback about LADI development from community
members that could benefit from it, I'm not sure whether I should
continue to contribute. Maybe I should give up on trying to make linux
audio usable for my needs. I could also stop using computers and make
music only by using my guitar. Because alternatives to Linux Audio
(windows/mac) don't suit my needs. Moreover they don't have the
potential to suit. This is why I'm contributing to Linux Audio and not
making VST plugins or something. This anti-dbus movement is getting too
far. If there is no user that accepts my point of view, there is no point
of me contributing.
Because it may be possible that someone has missed the whole point of my
jackdbus and session handling effort, I'll try to explain what I find
wrong/unacceptable in JACK (dbus-less) system as we have it now.
* JACK server tries to kill clients that are suspected to misbehave and
cause xruns or expose other kind of bad behaviour. This can result in
qjackctl (or patchage for example) being killed. IMO, killing control
apps is wrong. Apps that that don't process audio/midi should be
treated differently.
* When jackd is autolaunched, log messages are going to stdout/stderr of
the app that launched them. This is wrong, unix daemons are supposed
to have a log file, even if they are per-user. One of the reasons why
log file is a good thing to have is that it allows to analyze problem
post factum. This helps a lot if some misbehaviour is rarely
reproducable.
* Control apps that start the jack server through jackd know only about
the parameters that were known at compile time. Somewhat recent
example, IIRC, jack2 specific parameters (-S) and firewire options
missing after upgrade of jack because qjackctl does not know about
them. IMO, control apps should be able to query parameters for jack
and display the available options to user.
* Control apps that manage jack connections, are subject to realtime
constraints. IMO, this complicates control apps development for no
good reason. This is valid only for jack1. jack2 already uses
non-realtime threads for port notifications.
* Implementing control app requires C level program or use of specially
crafted bindings. It will be good if control apps could be
implemented with few lines of code in a scripting language as Python,
Ruby, Perl, etc.
* JACK graph (clients, ports and connections) API is badly designed and
is prone to race conditions. Fons talked about this problem recently
too.
* Session handling capabilities are suboptimal. Various programs lurk
here. I'll mention the two most popular ones: qjackctl cant
save/restore internal state of the programs. It also cant save and
then relaunch them automatically. lash cannot manage jack
settings and cannot restore connections for applications that are not
linked against liblash. There are other problems but those are the most
frustrating ones.
* Hardware port virtualization is suboptimal. it is provided through
the JACK "system" client. The only reliable ports are first ones, they
are expected to be the main input/output. If applications wants to
connect to phones for example it does not know on what ports they
are. projects/session should be movable to other system, one with
different hardware setup and [extensive] reconnecting should not be
required.
* Hardware port names are not human readble. Aliases exist but are not
widely used for various reasons. Users should be able to name and
group their ports to match their hardware cable setup.
* JACK "system" client is used for non-hardware ports (-X seq).
* There is no global list of JACK enabled applications.
* JACK MIDI is not widely accepted. JACK AUDIO + ALSA seq appears to be
acceptable solution. IMO, sample accurate audio+midi is very
important.
* There is no session handling for netjack LAN setups.
* Session handling apps cannot restore apps to more than one X11 screen (do
not mix with X11 display).
* Patchage-like (flowcanvas based) patchbay interface is best what I've
seen. Unfortunately Patchage does not integrate well with other parts
of JACK infrastructure.
As you can see, I have collected enough problems to fight. Almost all of
these fixes need new software modules to be written or existing ones to
be rewritten. In past years I've tried to collaborate
with people behind JACK, LASH, Patchage and Qjackctl. At the end, I
think that this attempt was probably wrong, with the only excepton of
jack2 (Stephane Letz) who accepted my jackdbus development into jack2
and we worked toghether on improving it and on the more general
"control API" initiative. The jackdbus code, my first contribution, that
is supposed to improve this mess was rejected by Paul Davis whom
maintains jack1. I've got some patches accepted by Patchage`s
author and maintainer, Dave Robillard, but they were rather cosmetic
ones. This forced me to maintain a software branch (Dave calls it a
fork) called lpatchage. It was supposed to be dashboard for the JACK
system. I also actively participated in lash-0.6.x development. The only
other developper, Juuso Alasuutari, shared some of my ideas, but at the
end we ended with fundamental differences about how session handling
should behave and what lash should become.
As part of my LADI efforts, two people where very helpful. Marc-Olivier
Barre and I managed to create pyjackctl, later renamed to laditools. It
is set of minimalistic but very useful control apps for JACK, a2jmidid
and LASH/ladish. Krzysztof Foltman helped a lot with probably the most
complex app in the laditools suite, ladiconf.
I'd like to mention people with whom collaboration, even if attempted by
me was non-existing: Rui Nuno Capela and Bob Ham. They clearly declared
From start that wont help for various reasons and I appreciate
this. Because this saved my precious time of part-time contributor to
Linux Audio.
In May/June this year, Fons Andriaensen got hit by a forcibly packaged
jackdbus (i'd call it mispackaging of jack) and started a flame war
against D-Bus evilness. I tried to be constructive until I got message
From the packager that dbus was forced, even given that he earlier
stated that he explicitly enabled dbus support in that package for one
reason or another.
In June this year, it become evident that I'm not able to contribute to
LASH anymore and that I want something else. I left the LASH project and
started a new session manager, ladish (project page is at ladish.org).
The first preview was released not long after. It was not yet a real
session manager but it was able to save and restore multiple jack
configs, a foundation for what I call "studio" in ladish. Since then
I've implemented some more stuff and I was hoping that next preview that
will be able to relaunch applications and restore connections between
their jack ports will be ready by the end of this year.
In recent few months, I had less time to contribute to ladish and
development slowed. The anti-dbus statements from various people
continued almost always without real argumentation behind them. For
these that were complains about dbus problems in real setups, I've given
suggestions. Almost always I got ignorace and more anti-dbus statements
in return. Maybe what I did is really unusable by others, despite
it being obviously usable by me. Maybe I suck at trying to help & support
people who seem to think that ladi is not that bad. Or maybe D-Bus
is indeed evil and eats babies and I fail to understand why, even after
I've listen to so many "arguments". Or maybe there are happy people
using jackdbus and laditools (or even lash-0.6.x) and looking toward
ladish. But I dont see them. If community does not share my frustration
with problems of the JACK system I mentioned above and does not accept
my vision that D-Bus is just the most suitable (but not perfect)
technology for what I'm trying to achieve, then it would be better for
everybody if I don't contribute anymore. I can detach from the community
and I can even detach from linux and even computers.
So now is the time to give your positive feedback and constructive
critics. Don't troll and don't start another flame war unless your goal
is to alienate me to stage of me detaching from this community. I will
not respond to trolish and flamish mails, feel free to contact me
with private mails if you prefer so. As I'm cross posting this mail, if
you are subscribed to more than one of the mailing lists, please reply
only to one of them. In order of preference, lad, lau, jack-devel. This
should avoid discussions half-shared between lists. If they happen at
all.
This mail is not supposed to be offensive to anyone. If someone feels
so, I declare that offense is not intentional. I don't deny the right of
different opinion on any subject and thus I have no reason to burn
witches.
--
Nedko Arnaudov <GnuPG KeyID: DE1716B0>
I just got the the January 2010 issue of Electronic Musician in the
mail today, and Harrison Mixbus (based on Ardour) was named the
"Download of the month."
Don't forget us linux guys. ;-)
Ricardus...
--
Richard V. Wielgosz
Audio Engineer, Writer
www.richwielgosz.com
Hi,
As this article points out
(http://digitaldub.wordpress.com/2009/12/16/linux-audio-session-scripting/),
Linux audio has advantages but also disadvantages, which lash/ ladish
etc want to solve.
But there is another feature in apps which makes the workflow much
faster and that is a simple:
'Open recent documents/settings/files'
Like you have in openoffice 'recent documents'.
I do miss this feature in apps as jack-rack, lv2rack, jack-mixer etc.
Btw. I saw an interesting research about open source and usability:
http://ingimp.org/
Regards,
\r
Basically every toolkit out there has widgets fader, button, knob.
So one you usually only has to reimplement the paint method in order to
change the appearance or write a different style.
If you prefer a toolkit independent gui library you could use my stripped
down version of the vstgui lib, which uses cairo as the drawing backend.
Together with skinman and knobman, the two widely used windows programs
for generating nice vst guis (running fine in wine) you have basically
the same
toolchain as the windows vst devs.
Drumfix
PS: Linux Vst developers, please write VST compliant code.
The interface of effEditOpen is effEditOpen(void *), not
effEditOpen(void *, void *)
i.o.w hosts should send a pointer to a struct {Display *d; Window w;} in
(ptr) instead
of Display * (val) and Window (ptr)
Hi,
I have some code in gtk2 that is leaking and I can't fix it. Over the
past two nights I have managed to get the leak down from 200MB/minute to
200MB/10 minutes but I can't get rid of it completely. It's annoying
because it increments in 200MB blocks so I have to wait for up to 10
mins to see if it is fixed or not. I have tried valgrind but it doesn't
really like jack and did not give me any useful output. I have traced
the leak through normal debugging and have verified that it does not
happen if I disable this offending code.
This code is run in the widgets realize event and the event is triggered
every 500ms.
PangoContext *pc = gtk_widget_get_pango_context(widget);
PangoLayout *pl;
PangoFontDescription *pfd;
PangoRectangle rect;
pfd = pango_font_description_new();
pango_font_description_set_family(pfd, "sans");
pango_font_description_set_size(pfd, 8 * PANGO_SCALE);
pango_context_set_font_description(pc, pfd);
pl = pango_layout_new(pc);
pango_layout_set_text(pl, "99", -1);
pango_layout_get_pixel_extents(pl, &rect, NULL);
pango_font_description_free(pfd);
g_object_unref(pc);
If I add another
g_object_unref(pl) ;
The app code will compile but when I run it I get this segfault:
*** glibc detected *** ./src/jackeq: free(): invalid pointer:
0x0000000001b87a60 ***
I can have one g_object_unref for either pl or pc without segfaulting
but not both.
I'm pretty sure this is the last leak I have to catch for the merged
gtkmeter.c/gtkmeterscale.c and I can't release jackeq until it is fixed.
Any assistance with this one is appreciated.
Cheers.
--
Patrick Shirkey
Boost Hardware Ltd
Hello all,
Updates of jconv, now called jconvolver, and the zita-convolver
library are available on the usual place:
<http://www.kokkinizita.net/linuxaudio/downloads>/
The new zita-convolver is API-compatible to the previous
release but not binary compatible. If you have any code
using it please recompile.
Release notes for jconvolver and fconvolver 0.8.4
-------------------------------------------------
Jconvolver is a real-time convolution engine. It
can execute up to a 64 by 64 convolution matrix
(i.e. 4096 simultaneous convolutions) as long as
your CPU(s) can handle the load. It is designed
to be efficient also for sparse (e.g. diagonal)
matrices. Unused matrix elements do not take
any CPU time.
In contrast to e.g. BruteFir, jconvolver uses
multiple partition sizes, small ones at the start
of the impulse response and progressively longer
ones for the rest. This allows it provide both
zero processing delay while still remaining
efficient in CPU use.
Fconvolver performs the same processing on files
instead of real-time.
For this relaese the package and the binaries
have been renamed to avoid a conflict with an
existing 'jconv' package (related to the Japanese
language).
Functionally this version is identical to jconv
0.8.0. See README.CONFIG for the syntax of the
config files. Since 0.8.0 it has been possible
to name and connect the Jack ports. The related
commands have been added to README.CONFIG.
Jconvolver will work with libzita-convolver 1.0.0,
but upgrading to 2.0.0 is recommended. Note that
if you update the library you have to recompile
this package.
NOTE: Jconvolver will normally not work correctly
when used with Jack's freewheeling mode, e.g. when
exporting in Ardour. It _could_ actually work when
used on a single processor system, but don't rely
on this. This release of jconvolver will print a
warning when freewheel mode is entered.
The 'mkwavex' utility from previous versions has
been replaced by 'makemulti' which offers some more
options.
Enjoy !
--
FA
Wie der Mond heute Nacht aussieht !
Ist es nicht ein seltsames Bild ?
Hi Karsten
Thanks!
First I had a little error returning ...
checking for main in -lclalsadrv... no
configure: error: clalsadrv is required
Then I installed libclalsadrv-dev (1.2.2-1)
and now it works.
Just one question, (how) can I make ams stop echoing "Unsupported MIDI event
received (type = 42)" to the terminal ?
I guess it's my controller synth who's sending "active sensing" messages to
ams. No showstopper to make some very nice sounds though.
Cheers!
Peter
On Sat, Dec 26, 2009 at 3:52 AM, Karsten Wiese <fzuuzf(a)googlemail.com>wrote:
> Hi,
>
>
> ams 2.0.1 has just been released.
>
> tar.gzip and tar.bzip2 are available at
> https://sourceforge.net/projects/alsamodular/files/
>
> the NEWS:
> ========================================
> ams-2.0.1 (2009-12-26)
>
> Fixed Bugs
> o Compile error for Qt 4.2 fixed
> o Highlight MIDI controller in Control Center,
> if MIDI event has been received.
> o Fix crash unbinding multiple controllables connected to the
> same midi controller.
> o Initialized variable in env-module.
> Fixes env-module mute bug discribed by lee(mrleelee).
>
> General Changes
> o MIDI channel numbering changed from 0..15 to 1..16.
>
>
>
> ams-2.0.0 (2009-06-12)
>
> New Features
> o Redesign of 3D look
> o Application icon
> o German translation
> o Keyboard shortcuts for menu and dialog items
> o Menu item for recently opened files
> o French translation (by Fank Kober)
> o New --name command line option to specify the ALSASEQ/JACK
> clientname
> o Legato in monophonic mode using the "--poly 1" command line
> option (by Atte Andre Jensen)
>
> General Changes
> o Port form Qt 3 to Qt 4.x library.
> o A newly written autoconf/automake environment now provides the
> usual "./configure && make && make install" comfort.
> o Command line options are reworked.
> - JACK now is the default interface, if the connection fails ams
> connects to ALSA. This behavior can be modified using the -J and
> -A options.
> - The initial patch file to be loaded no longer needs the -l
> option.
> ========================================
>
>
> regards & merry xmess,
> karsten
>
> -------------------------------------------------------------
>
>
> ------------------------------------------------------------------------------
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