Linux-audio-dev

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7516 discussions

by mutil

Qmingus is a software tool for music learning, training and improvisation. You can compose and play scales & chords at varying BPM and generate the notation. Qmingus is a front-end for the mingus <https://code.google.com/p/mingus/> music package, written in python and using the Qt framework. It is free software, released under the terms of the GPL. Here is a minimal website: http://pullbit.gr/projects/qmingus/ and development tracking will be here: https://launchpad.net/qmingus. Notes: * It contains several bugs, some of them in the mingus package itself, and I am not so sure about the correctness of some musical terms, either. Therefore, any suggestions, ideas, comments, and of course contributions, will be greatly appreciated. * There is no documentation yet about installation, compiling etc, Qmingus wiki <http://pullbit.gr/projects/qmingus/wiki/> will be the place for additional information in the future.

12 years, 11 months

jack2 build fails with --profile

by Bruno Gola

hi, i'm trying without success to compile jack2 (version 1.9.8 downloaded from jackaudio.org) using the --profile configure flag. $ python2 waf configure --profile --alsa ... $ python2 waf build ... [158/236] cxx: common/JackLibSampleRateResampler.cpp -> build/default/common/JackLibSampleRateResampler_6.o [159/236] cxx: common/JackAudioAdapter.cpp -> build/default/common/JackAudioAdapter_6.o [160/236] cxx: common/JackAudioAdapterInterface.cpp -> build/default/common/JackAudioAdapterInterface_6.o In file included from ../common/JackNetTool.h:21:0, from ../common/JackNetInterface.h:23, from ../common/JackNetManager.h:23, from ../common/JackNetManager.cpp:19: ../common/JackTools.h: In instantiation of ‘Jack::JackGnuPlotMonitor<T>::JackGnuPlotMonitor(uint32_t, uint32_t, std::string) [with T = float; uint32_t = unsigned int; std::string = std::basic_string<char>]’: ../common/JackNetManager.cpp:73:70: required from here ../common/JackTools.h:128:21: error: ‘fill_n’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive] In file included from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.2/../../../../include/c++/4.7.2/bits/char_traits.h:41:0, from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.2/../../../../include/c++/4.7.2/string:42, from /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.2/../../../../include/c++/4.7.2/stdexcept:40, from ../common/JackException.h:23, from ../posix/JackPosixMutex.h:26, from ../linux/JackPlatformPlug_os.h:44, from ../common/JackPlatformPlug.h:23, from ../common/JackMidiPort.h:26, from ../common/JackNetTool.h:20, from ../common/JackNetInterface.h:23, from ../common/JackNetManager.h:23, from ../common/JackNetManager.cpp:19: /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.2/../../../../include/c++/4.7.2/bits/stl_algobase.h:775:5: note: ‘template<class _OI, class _Size, class _Tp> _OI std::fill_n(_OI, _Size, const _Tp&)’ declared here, later in the translation unit [161/236] cxx: common/JackNetAdapter.cpp -> build/default/common/JackNetAdapter_6.o Build failed -> task failed (err #1): {task: cxx JackNetManager.cpp -> JackNetManager_4.o} without the --profile flag it works ok. i tried with other version (probably from git, i'm not sure) and it works.. any ideas? thanks, -- Bruno Gola <brunogola(a)gmail.com> http://bgo.la/ | +55 11 9-5552-3599

12 years, 11 months

Re: [LAD] avw.lv2: lvtk and time

by Michael Fisher

Hi again, The ingen crash you were experiencing is resolved (i think). The problem seemed to be that lvtk::GtkUI was double deleting its internal VBox. Which is now being created with Gtk::manage so Gtk can handle its disposal. I tested against drobilla's current svn (the entire stack), lv2-1.2.0, avw's current svn, and the just now updated lvtk origin/release-1.0.3 remote branch. On Sun, 2012-12-02 at 13:32 +0000, Aurélien Leblond wrote: > > Ahh yes, changes aren't in master quite yet. Try git fetching > again and > then checking out the release-1.0.3 branch > > $ git fetch origin > $ git checkout release-1.0.3 > > should do the trick. > > > > Ok, got it. > > > In the meantime, I opened another ticket about Ingen crashing if I > remove a plugin using lvtk while its UI is open. > > > It doesn't happen with plugins not using lvtk, and I think the issue > is inherited from lv2-c++-tools as I used to have the same problem... > > > If you need more info, let me know. > > > Regards, > Aurélien

12 years, 11 months

jack promiscuous mode

by Fons Adriaensen

(to the Jack devs) Any chance of JACK_PROMISCUOUS_SERVER being returned to working order ? Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)

12 years, 11 months

avw.lv2: lvtk and time

by Aurélien Leblond

Hi all, I'm currently modifying the avw.lv2 plugins to use the new extension from lv2: time. To do so, I'm switching from the old lv2-c++-tools to the new lvtk http://lvtoolkit.org. I haven't started to use the new extension just yet, I'm simply migrating my code to this new toolkit. Most of the code compile well, except the UI classes. I'm getting this type of error: [117/134] cxx: src/vco2_gui.cpp -> build/src/vco2_gui.cpp.63.o [118/134] cxxshlib: build/src/vco2_gui.cpp.63.o -> build/avw.lv2/vco2_gui.so /usr/bin/ld: cannot find nodelete: No such file or directory collect2: error: ld returned 1 exit status Waf: Leaving directory `/home/blablack/src/avw.lv2/build' Build failed -> task in 'vco2_gui' failed (exit status 1): {task 13619920: cxxshlib vco2_gui.cpp.63.o -> vco2_gui.so} ['/usr/bin/g++', '-shared', '-pthread', '-Wl,nodelete', 'src/vco2_gui.cpp.63.o', '-o', '/home/blablack/src/avw.lv2/build/avw.lv2/vco2_gui.so', '-Wl,-Bstatic', '-Wl,-Bdynamic', '-llvtk_plugin1', '-llvtk_ui1', '-lgtkmm-2.4', '-latkmm-1.6', '-lgdkmm-2.4', '-lgiomm-2.4', '-lpangomm-1.4', '-lgtk-x11-2.0', '-lglibmm-2.4', '-lcairomm-1.0', '-lsigc-2.0', '-lgdk-x11-2.0', '-latk-1.0', '-lgio-2.0', '-lpangoft2-1.0', '-lpangocairo-1.0', '-lgdk_pixbuf-2.0', '-lcairo', '-lpango-1.0', '-lfreetype', '-lfontconfig', '-lgobject-2.0', '-lglib-2.0'] I simply don't understand the error, it looks like ld is using nodelete as a filename instead of an argument. The build system I'm using is waf, and I modified the wscript to use c++11 (which seems to be required by lvtk, and I have no idea if this is related or not). I admit that I'm completely out of my depth here, so I commited the code onto my svn: svn checkout svn://svn.code.sf.net/p/avwlv2/code/trunk avwlv2-code Thanks in advance for any help! Aurélien

12 years, 11 months

Re: [LAD] CAPS* as LV2

by Aurélien Leblond

> I don't know about the caps plugins, however, i had a question on > avw.lv2. I installed those plugin's to work through a tutorial on > synth building in ingen (you may have done the tutorial). That works > fine in ingen. However, if i have that lv2 plugin set installed, > qtractor will not start for me.. if i uninstall the set, qtractor > starts fine. have you seen this behavior? Qtractor doesnt segment > fault or anything.. it just hangs. I tried with both 0.5.6 and current > svn head. > > Have you seen this? No I haven't seen this behaviour, but I haven't been using QTractor that much. What repository did you use for the plugins, LV2 and QTractor?

12 years, 11 months

Re: [LAD] Optimized device driver to Fast Track Pro (start developing)

by Guillaume Pellerin

On 23/11/2012 20:01, rodrigo(a)angoera.com.br wrote: > > Hi !!!!! > > The Fast Track Pro is USB 1.0, the max bandwidth is 12Mb/s. The TUSB3200 has > the isochronous USB transfer mode, that can occupy about 90% of the USB > bandwidth... Using 4 channel (2 IN and 2 OUT) with right and left, and 24 bits > (3 bytes each, in total 4(channel) * 2(left,right) * 3(data) = 24 bytes ) The > max bandwidth that could communicate is about 12Mbits/s = 1.5 Mbytes/s | 1.5 > Mbytes/s * 0.9 = 1.2 MBytes/s --> 1.2MBytes/s / 24 bytes = 50Khz ... So the > maximum USB 1.0 with 24 bits is 4 chanel in 48KHz... > You're absolutely right, the 24 bits 4 channels mode would be only accessible in 48 kHz samplerate. > I would like to know how it works the interface between USB AUDIO CLASS device > driver and the USB-AUDIO Alsa Device driver. And how does the isochronous > comunication works inside the kernel? Because I am using an RT Kernel and I > would like to set with the high priority this communication. > I don't really know how does the isochronous, but applying usual RT security audio rules seems sufficient to get high priority access and then very low latency (got 3 ms here with few audio realtime processes..). Further info here: http://joegiampaoli.blogspot.fr/2011/06/m-audio-fast-track-pro-for-debian-l… G

12 years, 11 months

eigenlabs + linux

by Alexandre Prokoudine

Hi, Is anybody interested to help Eigenlabs figure out the USB layer to get their stuff ported to Linux? http://www.eigenlabs.com/forum/threads/id/1148/ They are very free software friendly. Their code is available under GPL, they have a very good understanding of working with community while staying an enterprise (the instruments are not open, as far as I can tell), and, needless to say, the instruments they do are beyond awesome. Alexandre Prokoudine http://libregraphicsworld.org

12 years, 11 months

Re: [LAD] VSTGUI porting in Linux

by Louis Gorenfeld

>> Hello Louis, >> >> You might want to contact Filipe Coelho (aka falktx). >> >> http://forum.linuxmusicians.**com/viewtopic.php?f=47&t=10231<http://forum.linuxmusicians.com/viewtopic.php?f=47&t=10231> >> >> Regards, >> >> Jeremy >> > >I have some experimental code for VST UIs in Linux (using openGL), it's not >ready for release... >I've uploaded a source tarball with a plugin inside, although the UI seems >to have some little issues right now: >http://kxstudio.sourceforge.net/tmp/3BandEQ-VstTest1.tar.gz > >I'll work more on it soon, so for now it can be a "preview" of how it is >done. >But in short, it uses something I call "DISTRHO Plugin Toolkit", which >similar to Juce can make a single source code compile into different plugin >APIs (At the moment LADSPA, DSSI, LV2, VST and Standalone, some better than >others). >This plugin uses openGL for the UI, but Qt4 can be used alternatively. DISTRHO looks interesting, but I was wondering maybe if my existing VSTGUI code could somehow be used with the least amount of adjustments. I guess since it's just a bunch of x,y offsets and basic widgets it shouldn't be too hard to port to another toolkit, but I don't have the free time I used to. But, I'll definitely consider it. It's free, right? I didn't see a license so I'm guessing it'd be ok to bake into my binary-only application (apologies if I just missed it). I'm wondering if maybe downgrading VSTGUI and making the plugin perfectly WINE-friendly (or winelib) would be an option. Anyone know what the best VSTGUI version might be the best target for that? And any opinions on the VSTGUI port found at jacklab.net? -Louis

12 years, 11 months

Optimized device driver to Fast Track Pro (start developing)

by rodrigo＠angoera.com.br

Hi every body, I would like to develop an very optimized device driver for the USB soundcard, I am going to use the IC TUSB3200 similar the Fast Track Pro from M-Audio (I would like to optimize this device driver as well) , I am a hardware developer, and now I gonna start in the Linux world... I would like to know if someone could tell me what the better path to learn and develop an USB sound card???

12 years, 11 months

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Linux-audio-dev