Linux-audio-user November 2016

linux-audio-user@lists.linuxaudio.org

68 participants
75 discussions

Recording long tracks with jack_rec (libsndfile?)

by J. C.

Hey hey, I tried to record over long periods of time (7-9 hours), using jack_rec, which apparently relies on libsndfile for writing audiofiles. I started out using .wav, which broke off after 6:12:49 (2.1G). Next time, I tried using the file extension .w64, which yielded the same result. So, which format, or extension, would work for such periods of time? Thanks and best wishes, Jeanette -------- When you need someone, you just turn around and I will be there <3

8 years

Using commandline app to mark/detect sounds above a threshold

by J. C.

Hey hey again, the next thing I'm looking for is a program to detect volume over a certain threshold, which can print out a marker there. This function should - at best - be able to ignore new peaks within a certain period of time, like a gate with very long release times. To elaborate the scenario: I'm recording myself sleeping, to a) find involuntary actions and b) do quick narrations of dreams, should I wake up and remember anything. So, I'd like to jump to the short moments of "action" within the relative silence. Any help is appreciated, thanks for staying with me. Best wishes, Jeanette -------- When you need someone, you just turn around and I will be there <3

8 years

Music Made With Linux - Luka Prinčič: Requiem For The Future: A.I. [video & audio]

by Luka Prinčič / Nova deViator

hija all, yesterday I finished a video and published the album release on bandcamp... The visual performance piece "Requiem for The Future" for which I created music was premiered on 14. October. Since the music was made very early in the process I managed to create a whole release including a physical manifestation in a form of custom-made usb in a fold, designed and printer and bound localy and able to offer that on the premiere. so few weeks later here's a video for an edited release (not exactly how the music was in the performance, but very close). the music was made in Renoise, and I used some older materials of mine (granulated stuff in Pure Data, glitches from "cat /dev/sda | /dev/snd") and reworked number of field recordings. the video is using stock footage from archive.org (attribution cc licence) but glitched using ffmpeg and SoX and edited in Kdenlive. video: https://www.youtube.com/watch?v=HkFonGImAh0 bandcamp: https://novadeviator.bandcamp.com/album/requiem-for-the-future patreon post: https://www.patreon.com/posts/requiem-for-7131878 the video has a connection to the live visual performance in the fact that part of the performance were also two dogs doing a dog choreography and the concept of the performance which deals with the imaginary time when there are no humans left on earth, only A.I. and animals/nature and how do we imagine they would co-exist. more about the piece: http://aksioma.org/requiem/index.html a bit on the process of glitching the video material: http://nova.deviator.si/development-log/making-of-requiem enjoy! btw: if you want the USB, there's very few copies left... -- Luka Prinčič / Nova deViator / http://deviator.si - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://novadeviator.bandcamp.com | http://patreon.com/novadeviator http://wndv.si | http://kamizdat.si | http://emanat.si

8 years

ANN: jack-matchmaker 0.5.0

by Christopher Arndt

jack-matchmaker --------------- Version 0.5.0 is out with some breaking and other minor changes: Changes: * Reorganize command line options: -l/--list-ports is replaced by -o/--list-outputs and -i/--list-inputs, which can be given on their own or together and in combination with the -a/--list-aliases option. * Remove prefixes and separators from port and connection listings (so you can more easily parse the output in shell scripts or pipe the output of jack-matchmaker -c into a file and directly use it with the -p/--pattern-file option). * Add --version command line option. * Exclude currently unused alsainfo module from distribution. * Some internal code re-formatting for PEP-8 conformity. * AUR package added. Where to find it: GitHub: https://github.com/SpotlightKid/jack-matchmaker PyPI: https://pypi.python.org/pypi/jack-matchmaker AUR: https://aur.archlinux.org/packages/jack-matchmaker/ Share & Enjoy, Chris Arndt

8 years

RT kernel

by Yassin Philip

Hello, two quick questions: * Is there someone here using Ubuntu (16.04 LTS) with a hard RT PREEMPT kernel? * Can he tell me how to obtain it? Probably not pre-built from a repository/ppa, I've done my homework and found two that seem nothing but dead : o https://launchpad.net/~abogani/+ppa-packages o https://launchpad.net/~linux-libre/+archive/ubuntu/rt-ppa Otherwise, I guess I'll have to build it. Never done it. I've compiled all sort of stuff, but never a kernel. Now what would be the easiest way? By easy, in fact, I only mean scriptable. Ideally something like * Get the latest kernel sources package with apt * Fetch the corresponding patch (this is the hard part for me, I'm a bit lost in versions) * Apply the patch, build the kernel and install it The idea being to be able to repeat the procedure when a new kernel is out in the lifespan of my Ubuntu version, to stay up to date. Any pointers? Thanks for your patience. Note that if I manage to get a fairly repeatable procedure, I'll write a tutorial about it. Cordialement, yPhil -- Yassin Philip http://yassinphilip.bitbucket.org

8 years

Re: [LAU] MOL - MIDI Organic Looper

by Maurizio Berti

> Not sure what package I'm missing ... but I get: > > bob$ ./moloop > "sni-qt/14917" WARN 16:11:18.077 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE > Traceback (most recent call last): > File "./moloop", line 7, in <module> > mol.main() > File "/home/bob/Downloads/mol/mol-master/mol/__init__.py", line 1379, in main > Looper(app) > File "/home/bob/Downloads/mol/mol-master/mol/__init__.py", line 926, in __init__ > self.show_settings() > File "/home/bob/Downloads/mol/mol-master/mol/__init__.py", line 1264, in show_settings > dialog = SettingsDialog(self) > File "/home/bob/Downloads/mol/mol-master/mol/__init__.py", line 423, in __init__ > self.auto_connect_group.setId(radio, i) > AttributeError: 'SettingsDialog' object has no attribute 'auto_connect_group' > > Probably a pyqt4 module. I've seen a similar error in a previous software I released. Unfortunately I'm away for a couple of days, so I can't check it, and it could still be an error of mine. I'll try to debug it as soon as I come back! Maurizio

8 years

ANN: jack-matchmaker 0.3.0

by Christopher Arndt

jack-matchmaker --------------- jack-matchmaker is a small command line utility that listens to JACK port registrations by clients and connects them when they match one of the port pattern pairs given on the command line at startup. jack-matchmaker never disconnects any ports. The port name patterns are specified as pairs of positional arguments or read from a file (see below) and are interpreted as Python regular expressions, where the first pattern of a pair is matched against output (readable) ports and the second pattern of a pair is matched against input (writable) ports. Matching is done against the normal port names as well as any aliases they have. Example: jack-matchmaker '.*:out_l' system:playback_1 \ '.*:out_r' system:playback_2 Port patterns can also be read from a file given with the -p/--pattern-file option. The file is re-read when the HUP signal is received. Where to find it: GitHub: https://github.com/SpotlightKid/jack-matchmaker PyPI: https://pypi.python.org/pypi/jack-matchmaker Requirements: * A version of Python 3 with a ctypes module (i.e. PyPy 3 works too). * JACK version 1 or 2. * Linux, OS X (untested) or Windows (untested, no signal handling Acknowledgements: jack-matchmaker is written in Python and incorporates the jacklib module taken from falkTX's Cadence application. It was inspired by jack-autoconnect, which also auto-connects JACK ports, but doesn't support port aliases. jack-autoconnect is also written in C++, and therefore probably faster and less memory hungry. The idea to read ports (patterns) from a file and re-read them on the HUP signal was "inspired" by aj-snapshot. Share & Enjoy, Chris Arndt

8 years

ANN: jack-matchmaker 0.4.0

by Christopher Arndt

jack-matchmaker --------------- Version 0.4.0 is out hard on the heels of 0.3.0! This now has the full feature set I wanted the program to have when I started coding it, so I'll probably release a stable version 1.0 soon-ish. If you have any suggestions for improvement or other comments, please let me know! Changes: * Added -c command line option to list existing JACK port connections. Where to find it: GitHub: https://github.com/SpotlightKid/jack-matchmaker PyPI: https://pypi.python.org/pypi/jack-matchmaker Share & Enjoy, Chris Arndt

8 years

Music: infraLogos

by jonetsu

Here is one that could possibly be put in (slow) techno/trance somehow. https://soundcloud.com/nominal6/infralogos Cheers.

8 years

Freewheeling

by jonetsu

Hi, 8 years later (last release is 2008) - does freewheeling today works with the current Linux VST plugins ? http://freewheeling.sourceforge.net/ Cheers.

8 years

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Linux-audio-user November 2016