Linux-audio-announce

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3191 discussions

by Robin Gareus

Xjadeo is a video player that displays a video-clip in synchronized to an external time source (MTC, LTC, JACK-transport). http://xjadeo.sf.net/ -=- Greetings Soundtrack Designers and fellow Multimedia Artists, Xjadeo version 0.8.0 just came out and brings a lot of significant changes. Most notably: * openGL display * video-frame indexing * built-in UI / context menu With openGL, video-scaling is now performed in hardware and playback synchronized to the screen's vertical refresh (if the hardware permits that; most graphics cards do). This is the new default display and supersedes prior platform-specific video outputs (XVideo, X11/imlib2, SDL, quartz, which are still available via the --vo option and also used a fallback). Video files are now scanned and indexed on load which provides for reliable seeking to video frames for a wide variety of codecs where frame-accurate seeking was not possible with earlier versions of xjadeo. This also acts as a guard to detect and refuse broken video files early on. User interaction has been overhauled, most notably by adding a menu that facilitates discovering key-bindings. This deprecates the external control application qjadeo which previously came with xjadeo. There have been over 200 changes since the last release, the complete changelog is available at https://github.com/x42/xjadeo Other highlights include: * separate On-Screen-Display for Sync-Source and Video Timecode * self-documenting OSC API * disable screensaver * 64 bit timeline * new website Note that various command line options have changed. The seek-related -K, -k parameters are no longer needed due to the change to indexing. Letterbox is enabled by default, and it is now also possible to start xjadeo without an initial file. In short, a lot of defaults have been updated to make xjadeo more topical (despite that fact the the menu for the X11 variant is plain old toolkit-less Xlib :) Statically linked binaries are available for GNU/Linux, OSX and Windows from http://xjadeo.sourceforge.net/download.html as is the source code in terms of the GPLv2. xjadeo is developed and has been tested for accuracy with ffmpeg-2.2.5 it may or may not work properly with different versions, but compiles with any version of ffmpeg >= 1.0 to date. Many thanks to Chris Goddard who provided valuable feedback and spent several weeks on quality assurance and polishing user interaction. We're far from done on the quest to 1.0, yet 0.8.0 marks a major milestone in the life of xjadeo. Cheers! robin

10 years, 10 months

Re: [LAA] [LAU] [LAD] hrec

by Egor Sanin

Hi Silvain Thanks for trying it out! On 8/21/14, F. Silvain <silvain(a)freeshell.de> wrote: > Hey egor, > thanks for the new tool. I just installed and ran into this error: > *** cut *** > Traceback (most recent call last): > File "/usr/local/bin/hrec", line 19, in <module> > from pyeca import * > File "/usr/lib/python3.1/lib-dynload/pyeca.py", line 46, in <module> > from ecacontrol import * > File "/usr/lib/python3.1/lib-dynload/ecacontrol.py", line 77 > print 'c=' + I._cmd > ^ > SyntaxError: invalid syntax > *** end *** > > I just updated ecasound from git and made sure it compiled with python3.1 . Yeah at the moment I can only confirm that hrec works when run with Python2 explicitly. As I mentioned I had problems running it with Python3. As far as I know, the pyeca python module, which I use as a bridge between hrec and ecasound, doesn't play well with Python3. Try installing hrec with python2 explicitly, on Arch Linux it would be like this: $ python2 setup.py install

10 years, 10 months

[LAD] hrec

by Egor Sanin

Hi folks, I've been working on and off for the last little while on a command line recording utility. It's really basic and the code is pretty ugly. It exists partly because in my lazy search I couldn't find anything that satisfied my particular need, and also because it was interesting. I just made a first release, so you could try it if you like. The program is called hrec, it's basically a curses front end to a very limited subset of ecasound's functions. Code is here: https://sourceforge.net/projects/hrec/ AUR package is here: https://aur.archlinux.org/packages/hrec/ I'm planning to do change it soon, but the basics will remain the same. Mostly I plan to remove the playback functionality, as it's almost useless -- plenty of other software to do it much better. Also I need to migrate the code to Python 3, but I'm getting stuck on the python ecasound bindings. In the couple of (admittedly not very thorough) attemps I've made I ran into problems with the current pyeca module. Any advice would be appreciated. Anyway I thought I might as well release it now and get some feedback. I hope someone finds hrec useful! Criticism and insults are also welcome. Thanks!

10 years, 10 months

Announcing LibreMusicProduction.com

by Gabriel Nordeborn

Hey everyone! It's our great pleasure to announce Libre Music Production ( http://www.libremusicproduction.com). Libre Music Production (LMP) is a web portal and resource aimed at helping you make music using free and open source software. While the portal was initially developed by a small group of people, the aim and ambition is that LMP becomes a community project where we all help out in building a great resource for making music using FLOSS software. At launch we have over 10k words worth of articles and guides, as well as a little over 2 hours of recorded video material. We've prepared a press release that details more about this project at: http://libremusicproduction.com/pressrelease We'd greatly appreciate any help in spreading the word about this resource, as well as any help with contributing content and so on. Please feel free to copy+paste the press release as you'd like, and thank you very much for any help! Any other feedback is also greatly appreciated. Please use the contact forms on the website :) Have a nice day!

10 years, 10 months

[ANN] MOD Duo's Kickstarter campaign to be launched in mid September

by Gianfranco Ceccolini

Greetings Linux Audio Users and Developers !!! I'm very happy to inform that we will launch the MOD Duo's Kickstarter campaign in mid September. The MOD Duo is our second model and we've been putting a lot of engineering in it based on the feedback we had from the MOD Quadra experience. We deeply hope it becomes a device that empowers the Linux Audio community, bringing together developers and musicians. A pre-campaign site was created to warm up the communication engines: http://stepontothefuture.com. Hope you all enjoy and spread the word Kind regards Gianfranco Ceccolini The MOD Team

10 years, 10 months

Silvet Note Transcription Vamp plugin v1.0 released

by Chris Cannam

Silvet is a Vamp plugin for note transcription in polyphonic music. http://code.soundsoftware.ac.uk/projects/silvet ** What does it do? Silvet listens to audio recordings of music and tries to work out what notes are being played. To use it, you need a Vamp plugin host (such as Sonic Visualiser). How to use the plugin will depend on the host you use, but in the case of Sonic Visualiser, you should load an audio file and then run Silvet Note Transcription from the Transform menu. This will add a note layer to your session with the transcription in it, which you can listen to or export as a MIDI file. ** How good is it? Silvet performs well for some recordings, but the range of music that works well is quite limited at this stage. Generally it works best with piano or acoustic instruments in solo or small-ensemble music. Silvet does not transcribe percussion and has a limited range of instrument support. It does not technically support vocals, although it will sometimes transcribe them anyway. You can usually expect the output to be reasonably informative and to bear some audible relationship to the actual notes, but you shouldn't expect to get something that can be directly converted to a readable score. For much rock/pop music in particular the results will be, at best, recognisable. To summarise: try it and see. ** Can it be used live? In theory it can, because the plugin is causal: it emits notes as it hears the audio. But it has to operate on long blocks of audio with a latency of many seconds, so although it will work with non-seekable streams, it isn't in practice responsive enough to use live. ** How does it work? Silvet uses the method described in "A Shift-Invariant Latent Variable Model for Automatic Music Transcription" by Emmanouil Benetos and Simon Dixon (Computer Music Journal, 2012). It uses probablistic latent-variable estimation to decompose a Constant-Q time-frequency matrix into note activations using a set of spectral templates learned from recordings of solo instruments. For a formal evaluation, please refer to the 2012 edition of MIREX, the Music Information Retrieval Evaluation Exchange, where the basic method implemented in Silvet formed the BD1, BD2 and BD3 submissions in the Multiple F0 Tracking task: http://www.music-ir.org/mirex/wiki/2012:Multiple_Fundamental_Frequency_Esti…

10 years, 10 months

Constant-Q library and Vamp plugin

by Chris Cannam

Announcing a new C++ library and Vamp plugin implementing the Constant-Q transform of a time-domain signal. https://code.soundsoftware.ac.uk/projects/constant-q-cpp The Constant-Q transform is a time-to-frequency-domain transform related to the short-time Fourier transform, but with output bins spaced logarithmically in frequency, rather than linearly. The output bins are therefore linearly spaced in terms of musical pitch. The Constant-Q is useful as a preliminary transform in various other methods such as note transcription and key estimation techniques. This library provides: * Forward transform: time-domain to complex Constant-Q bins * Forward spectrogram: time-domain to interpolated Constant-Q magnitude spectrogram * Inverse transform: complex Constant-Q bins to time domain The Vamp plugin provides: * Constant-Q magnitude spectrogram with high and low frequency extents defined in Hz * Constant-Q magnitude spectrogram with high and low frequency extents defined as MIDI pitch values * Pitch chromagram obtained by folding a Constant-Q spectrogram around into a single-octave range The code is provided with full source under a liberal licence, and plugin binaries are provided for Windows, OS/X, and Linux. The method is drawn from Christian Schörkhuber and Anssi Klapuri, "Constant-Q transform toolbox for music processing", SMC 2010. See the file CITATION for details. If you use this code in research work, please cite this paper.

10 years, 10 months

LV2 1.10.0 and friends

by David Robillard

Good news everyone! LV2 1.10.0 is out, along with enough parallel releases that I'm entirely too busy[1] to make a proper release email for each one. LV2 1.10.0 download: http://lv2plug.in/spec/lv2-1.10.0.tar.bz2 Cutting edge developers who go to all the best parties should note that the atom Object/Resource/Blank types have been merged and new code should use only Object (this simplification is not conceptually a compatibility breakage, but code explicitly using only Blank should be updated). Aside from this, there have been only minor improvements and additions since 1.8.0. Freshly prettified documentation and a full change log is available at http://lv2plug.in/ns/ Also check out the work-in-progress example-based LV2 book, "Programming LV2 Plugins" at http://lv2plug.in/book/ Related release announcements: http://drobilla.net/2014/08/08/jalv-1-4-6/ http://drobilla.net/2014/08/08/lilv-0-20-0/ http://drobilla.net/2014/08/08/suil-0-8-2/ http://drobilla.net/2014/08/08/sratom-0-4-6/ The RDF stack has also seen some updates: http://drobilla.net/2014/08/08/sord-0-12-2/ http://drobilla.net/2014/08/08/serd-0-20-0/ Enjoy, ~ Your friendly local neighbourhood benevolent dictator who clearly needs to automate the release process. [1] i.e. lazy, but "busy" makes me sound important, doesn't it? There could even be meetings involved. -- dr

10 years, 10 months

Hydrogen 0.9.6 released

by mauser＠smoors.de

Hi everyone, i'm happy to announce the final release of Hydrogen 0.9.6. I'm pretty sure that most of the users are already working with a 0.9.6-beta version, but here again is a small list of the most important changes in 0.9.6: * new build system (cmake) * add undo for song/pattern editor * jack-session support * jack-midi support * several bug fixes * tabbed interface * several small changes to the GUI * improve ExportSong add use of TimeLineBPM, RubberbandBatch processor and different types of resample interpolation The release can be downloaded via github: https://github.com/hydrogen-music/hydrogen/archive/0.9.6.tar.gz At this time, this is a linux-only release. Installers for Windows / OS X may follow in the future. Big thanks to all those wonderful people who made this release happen and who are keeping this project alive! Best regards, Sebastian

10 years, 11 months

amsynth 1.5.0

by Nick Dowell

amsynth 1.5.0 is now available, with a host of improvements and new features; - new filter modes: notch and bypass - new filter controls for key-tracking and velocity sensitivity - OSC2 octave range increased - ring modulation can now be dialled in (instead of on/off) - LFO can now be routed to OSC1, OSC2, or both - fixes an audible click when using fast filter attack times - note and controller events are now rendered sample-accurate when run as a plugin or JACK, fixing MIDI timing jitter - DSSI & LV2 plug-in builds can now load any preset by right-clicking the UI background - bank & preset loading is now faster Source code: https://github.com/nixxcode/amsynth/releases/download/release-1.5.0/amsynth… If you find any problems, please file a bug report @ http://code.google.com/p/amsynth/issues/list Thanks to all who have helped by providing suggestions and feedback. Nick

10 years, 11 months

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Linux-audio-announce