Linux-audio-dev January 2014

linux-audio-dev@lists.linuxaudio.org

50 participants
26 discussions

by Aurélien Leblond

Hello, I have a strange issue in my plugins GUI beatslash-lv2 (https://github.com/blablack/beatslash-lv2) or deteriorate-lv2 (https://github.com/blablack/deteriorate-lv2). The GUI widgets to control the plugins gets disconnected when used for a while. I can reproduce the issue in Ingen almost everytime, although I never know exact when the GUI will disconnect and Ingen doesn't output any error. What happens is that once the widgets disconnect, if I try to change the values via the GUI (turn the dial, change the value of a combo box, etc) the changes are not transferred to the LV2 DSP. The way I connect the GUI values to the LV2 values is as follows: m_comboWaveForm->signal_changed().connect(compose(bind<0> (mem_fun(*this, &Vco2GUI::write_control), p_waveForm), mem_fun(*m_comboWaveForm, &ComboBoxText::get_active_row_number))); where m_comboWaveForm is of type Gtk::ComboBoxText* Even if I close the GUI and reopen it, the signals won't reconnect. I'm not sure where the issues is (GTK, LVTK.....or my code!). Is there a better way to connect signals in such design? Thanks in advance for the help. Aurélien

10 years, 7 months

[ANN] Boss DS-1 simulator LV2 plugin

by Gianfranco Ceccolini

Greetings Linux audio users and developers We are very happy to announce the DS-1 distortion stomp box simulator. You can download it at https://github.com/portalmod/mod-distortion To install use "make & make install" and you'll have the bundle in /usr/local/lib/lv2 folder. It uses a mathematical model of the original DS-1 electrical circuit and the programmer (André Coutinho) took lots of care to stick to the analog circuit setup. More simulators are on the way, hence the mod-distortions repo. Feedbacks are always welcome. Happy 2014 for everyone Gianfranco The MOD Team

10 years, 7 months

JACK, cgroups and systemd

by Dominique Michel

Recently, I experimented with Debian sid, which use systemd. Systemd idea is nice, but its implementation is a catastrophe. It is more than one year I am using the kernel cgroups on gentoo to get rt scheduling with JACK, that without any trouble. On Debian, this is just impossible, because whatever I try, systemd insist to put what it think is good to have into the rt cgroup, which soon or later result in a complete system freeze with even dead magic keys. After loosing my time a few days with this, I removed Debian and installed gentoo instead. I found the reason here: http://article.gmane.org/gmane.linux.kernel/1063354 "Lennart Poettering: Well, this feature is... completely irrelevant for normal desktop people. ... In fact, I just prepped a patch to systemd to move every service and every user session into its own cgroup in the 'cpu' hierarchy (in addition to the group it already creates in the 'systemd' hierarchy)." Another completely idiotic stuff of this guy. The point of the cgroups is it is possible to setup them for whatever use will be made with a computer, and this guy think he have the insane and pretentious capability to decide for every single user of the use they will made with their computers, and he is suggesting users doing something else are abnormal. He must be stopped! Regards, Dominique

10 years, 7 months

Static verification of real-time safety

by David Robillard

Hello, Does anyone know if anything has emerged from http://www.google-melange.com/gsoc/proposal/review/google/gsoc2012/fundamen… or, what alternative solutions for doing the same thing exist today? I know I have #ifdef __clang__ # define REALTIME __attribute__((annotate("realtime"))) #else # define REALTIME #endif in my code and was tinkering with an implementation capable of doing this at some point, but can't dig up the details, or whatever system I was using to do it. It would be oh so very nice to be able to statically verify that code is real-time safe... -- dr

10 years, 7 months

deteriorate-lv2 1.0.2 released

by Aurélien Leblond

Hello all, Yesterday I released the version 1.0.2 of deteriorate-lv2. This set contains a very simple and basic granular effect and a simple/basic downsampler. I kept the code very simple and basic on purpose. They might not be the most refined plugins around, but they create a nice sound nonetheless... More info here: http://objectivewave.wordpress.com/deteriorate-lv2/ A demo video can be found here: http://www.youtube.com/watch?v=C63m5FdlzX0 Enjoy! Aurélien

10 years, 7 months

beatslash-lv2 1.0.2

by Aurélien Leblond

>> To celebrate this release, I made a video demonstration of what it can do: >> http://www.youtube.com/watch?v=RtZkKfTJEK8 > > Quite interesting. I'm not sure if I really understand what's going on > in the video. Esp. for what Seq24 is used. Thanks. All right so :) - Hydrogen output goes into Ingen input - Ingen has the repeater and slicer one after the other, and the output of that is recorded So in a nutshell, Hydrogen goes to Repeater which goes to Slicer which goes to Output. Seq24 is there to trigger the repeater or the slicer using the trigger module of Ingen. I used Seq24 here to be perfectly in sync... I tried to do with manually with a midi keyboard but unfortunately wasn't precise enough :) Hope that's clearer. Otherwise don't hesitate to ask :) Aurélien

10 years, 7 months

[LAU][ANN][MOD] mod-host supports MIDI controllers

by Ricardo Crudo

Hello LAD, LAU. I've pushed a new branch of the mod-host<https://github.com/portalmod/mod-host>(midi-control), the code in this branch makes possible assign MIDI controllers to control any input parameter of the lv2 plugins. This is in development yet, but anyway I'm inviting you to try it as is and, if possible, help us reporting bugs or suggestions of improvements. Two new commands were added: map and unmap. The sintaxes are: map <effect_instance> <parameter_symbol> unmap <effect_instance> <parameter_symbol> After run the map command, just acts in the control that you wanna assign to (MIDI Learn). The feedback to user is very poor yet, so you won't receive a message saying if the mapping was well done. I hope you enjoy it. Regards, Crudo

10 years, 8 months

beatslash-lv2 1.0.2

by Aurélien Leblond

Hello everyone! I'm happy to announce the version 1.0.2 of beatslash-lv2, a set of lv2 plugins providing a beat repeater and a beat slicer. This version mainly provides a fix for a nasty crash when slicing in reverse mode. More info here: http://objectivewave.wordpress.com/beatslash-lv2/ To celebrate this release, I made a video demonstration of what it can do: http://www.youtube.com/watch?v=RtZkKfTJEK8 Enjoy :) Aurélien

10 years, 8 months

Re: [LAD] io GNU/Linux 2014.01 (64-bit) iso up :) (screencast too)

by MK aka El Doctor

Hi all Uploaded a new live DVD/USB, if you want to give it a try ;) https://www.youtube.com/watch?v=bT0GsHNnZHs http://manu.kebab.free.fr/iognulinux.html https://sourceforge.net/projects/io-gnu-linux/ # Prepare an usb flash drive (for exemple /dev/sdc) (Will erase disk) wget -c http://sourceforge.net/projects/io-gnu-linux/files/io-live-hybrid-3.12.6-am… -O io-live-hybrid-3.12.6- amd64--2014.01.09-23.53.iso cp io-live-hybrid-3.12.6-amd64--2014.01.09-23.53.iso /dev/sdc Enjoy :) MK

10 years, 8 months

Audio Levitation

by Patrick Shirkey

Theoretically, how big can this scale? http://www.youtube.com/watch?feature=player_embedded&v=odJxJRAxdFU -- Patrick Shirkey Boost Hardware Ltd

10 years, 8 months

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Linux-audio-dev January 2014