Linux-audio-user June 2017

linux-audio-user@lists.linuxaudio.org

32 participants
41 discussions

M-Audio Fast Track Pro: unreliable, distorted recording

by Lewis Pike

I'm the (un?)lucky owner of an M-Audio Fast Track Pro USB audio interface and I'm having some serious problems getting this device to record audio reliably under Linux. I've been using arecord and occasionally Audacity for all of my testing. My problem is this: Recording a take works about 80% of the time. In the remaining ~20% of cases, the captured audio is extremely loud with severe digital distortion. Once this problem shows up, it persists for any subsequent takes. The only way I've found to make the problem go away, at least temporarily, is to power-cycle the Fast Track Pro. I considered the possibility that this particular device might be defective, but it seems to work wonderfully under Windows. I'm calling out to other Fast Track Pro users in the hope that someone out there has encountered the same problem and better still, found a solution. Any suggestions at all would be greatly appreciated! .lewis

6 years, 11 months

html5 in ff through jack

by Peter P.

Hi list, I have been search the archives and the web a bit and it seems there is no easy way to route html5 audio playback from firefox through jack on Debian testing. Is this still the case or has there been recent development that might enable it? What would have to be done to make it work? This functionality is the last piece in my puzzle to finally get rid of flash. thanks for pointers, P

7 years, 8 months

ShowQ - "a QLAB for Linux"

by Michael Jarosch

Hi there! ShowQ is a unique cue-player for Linux-Audio-Users. I use it as a core application for my theater activities. Even in the linux-community it's not a very well known application, although there's no other linux-program (I know) if you need a one-shot-audio-player with features like f.e. programmable fade-in, fade-out, no matter if you want it time-based or triggered by space (or another key). It can do a lot more - ShowQ has MIDI-support. Although I never tested this feature, it should be possible to control any application with MIDI-support. QLC(+) f.e. - or maybe some video-players do support MIDI - I don't know... Yeah, of course, ShowQ is not a drop in replacement for QLAB, but speaking about audio it fits quiet perfectly in my setup. ShowQ is in the Debian (and Ubuntu?) repositories, it's written in C++ and of course released under the terms of the GPL. Although this app is quiet useful for technicians like me, the development stopped years ago. I am not a coder, but I do my best to keep this project alive. On the Debian bug-tracker I write bug-reports for ShowQ, hoping that on one hand it's useful for other users to work around problems, on the other hand that someone fixes them. Last time I reported a bug Jaromír Mikeš the Debian-maintainer of ShowQ wrote that he is not able to fix the bugs and he would like to kick ShowQ. Of course, he also would like to package an alternative if there would be some he could package. I don't know any - so my linux-based theater setup is about to be killed one day when ShowQ wouldn't compile on my debian machine, anymore. So, what do I want from you? Test ShowQ! Maybe it's the app you've been missing for a long time! And if you're a coder with C++-skills, check out my bugreports on https://bugs.debian.org/cgi-bin/pkgreport.cgi?repeatmerged=no&src=showq - maybe you've got the clue... OR: Got an alternative to ShowQ? You're welcome! Greets! Mitsch

7 years, 11 months

Re: [LAU] Render and animate OctaMed songs in batch processing

by Kjetil Matheussen

Henning Thielemann: > > > Decades ago I arranged more than 200 songs using MED/OctaMED/OctaMED > Studio on various Amigas. In the meantime I converted them all to MMD1 and > MMD2 format. I wanted to render them to audio files (e.g. WAV) for use on > CDs or MP3 players. I could render the MMD1 files without problems using > UADE, however UADE refuses to render MMD2 (with mixer mode). XMP seems to > play some MMD2 modules, but not all of them (maybe has to do with mixer > mode). > Radium seems to accept only MMD2 and not MMD1, but when playing > there is only silence (whereas demo songs make noise, so no Jack problem). > That makes sense. Radium only import MIDI instruments from MMD2 and MMD3 songs. I made Radium to replace Octamed, so I needed to import my MMD2/MMD3 songs, which only contained MIDI. > Next step: I want to create music videos from the playing modules for > upload, say, to YouTube. I am certainly not patient enough to perform all > songs in OctaMED in an Amiga emulator (FS-UAE) and record the performances > using a screen grabber (like ffmpeg -f x11grab). I guess you could create a script and let it run over night. Something like this: 1. Modify S/startup-sequence to load and play the next module. 2. Start a program that monitors the audio output of uae. When uae stops producing sound, the script shuts down uae. 3. Goto 1. > If playing in Radium > would work, I could check whether it is possible to control Radium and > screen grabbing from a shell script. I've used obsproject.com to create the youtube radium videos. It performed far better than everything else I tried. Almost no problems recording glitch-free 1900x1080@60hz on my ~10 year old computer. It's probably possible to script it somehow too.

7 years, 12 months

New song "Flying Fool"

by Dennis Schulmeister-Zimolong

Hi all, This is a new song I recorded recently. It is Made with Ardour and Blender. Ardour even has a cameo in the video. :-) https://www.youtube.com/watch?v=HERMqverQWM Hope you like it. :-) Dennis

8 years

[ANN] Qtractor 0.8.3 - The Stickiest Tauon is out!

by Rui Nuno Capela

Howdy! Qtractor 0.8.3 (stickiest tauon) is out! Changes for this mostly just a bug-fix beta release: - Make sure any just recorded clip filename is not reused while over the same track and session. (CRITICAL) - LV2 Plug-in worker/schedule interface ring-buffer sizes have been increased to 4KB. - Fixed track-name auto-incremental numbering suffix when modifying any other track property. - WSOLA vs. (lib)Rubberband time-stretching options are now individualized on a per audio clip basis. - Long overdue, some brand new and fundamental icons revamp. - Fixed a tempo-map node add/update/remove rescaling with regard to clip-lengths and automation/curve undo/redo. - Fixed a potential Activate automation/curve index clash, or aliasing, for any plug-ins that change upstream their parameter count or index order, on sessions saved with the old plug-in versions and vice-versa. Description: Qtractor [1] is an audio/MIDI multi-track sequencer application written in C++ with the Qt framework [2]. Target platform is Linux, where the Jack Audio Connection Kit (JACK [3]) for audio and the Advanced Linux Sound Architecture (ALSA [4]) for MIDI are the main infrastructures to evolve as a fairly-featured Linux desktop audio workstation GUI, specially dedicated to the personal home-studio. Website: http://qtractor.org http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://download.sf.net/qtractor/qtractor-0.8.3.tar.gz - source package: http://download.sf.net/qtractor/qtractor-0.8.3-31.rncbc.suse.src.rpm - binary packages (openSUSE Tubleweed): http://download.sf.net/qtractor/qtractor-0.8.3-31.rncbc.suse.i586.rpm http://download.sf.net/qtractor/qtractor-0.8.3-31.rncbc.suse.x86_84.rpm - AppImage [7] package (*NEW*): http://download.opensuse.org/repositories/home:/rncbc/AppImage/qtractor-lat… Git repos: http://git.code.sf.net/p/qtractor/code https://github.com/rncbc/qtractor.git https://gitlab.com/rncbc/qtractor.git https://bitbucket.org/rncbc/qtractor.git Wiki (help still wanted!): http://sourceforge.net/p/qtractor/wiki/ - static rendering: http://qtractor.org/doc http://qtractor.sourceforge.net/doc - user manual & how-to's: http://download.sf.net/qtractor/qtractor-manual-and-howtos.epub http://download.sf.net/qtractor/qtractor-manual-and-howtos.pdf License: Qtractor [1] is free, open-source Linux Audio [5] software, distributed under the terms of the GNU General Public License (GPL [6]) version 2 or later. References: [1] Qtractor - An audio/MIDI multi-track sequencer http://qtractor.sourceforge.net http://qtractor.org [2] Qt framework, C++ class library and tools for cross-platform application and UI development http://qt.io/ [3] JACK Audio Connection Kit http://jackaudio.org [4] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [5] Linux Audio consortium of libre software for audio-related work http://linuxaudio.org [6] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html [7] AppImage, Linux apps that run anywhere http://appimage.org/ See also: http://www.rncbc.org/drupal/node/1839 Enjoy && Keep the fun, always. -- rncbc aka Rui Nuno Capela

8 years

Overdub Audio on Video

by Will Godfrey

I have a video track with existing audio, and what I want to do is add speech descriptions etc. Is there an easy way to do this? Trying to handle reading out stuff while managing everything else for the original recording is proving a bit too much for me :( -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

8 years

Re: [LAU] jackd terminates on its own

by Kjetil Matheussen

(cc to the jack-devel mailing list) > jonetsu: > > When using the latest Bitwig and loading several projects, enabling > > audio for each one, playing it for a few seconds then loading another > > one, playing it, so on so forth, jackd will steadily terminate, like > > this: > > > > Jack: JackPosixProcessSync::TimedWait time out = 116080 > > Jack: JackPosixProcessSync::TimedWait finished delta = 3668.0 > > Jack: JackEngine::ClientExternalClose ref = 2 > > Jack: JackEngine::ClientCloseAux ref = 2 > > Jack: JackEngine::ReleaseRefnum server quit > > Unknown error... > > terminate called after throwing an instance of > > 'Jack::JackTemporaryException' what(): > > Hi, I just took a glance at the source code of jack2, and when you get this message: "Jack: JackEngine::ClientExternalClose ref = 2" ...and you don't see any message about "Kill", it's the client that has called jack_close(). So it seems like BitWig has called jack_close() manually. However, the rest of the messages indicates that something is wrong somewhere.

8 years

jackd terminates on its own

by jonetsu

When using the latest Bitwig and loading several projects, enabling audio for each one, playing it for a few seconds then loading another one, playing it, so on so forth, jackd will steadily terminate, like this: Jack: JackPosixProcessSync::TimedWait time out = 116080 Jack: JackPosixProcessSync::TimedWait finished delta = 3668.0 Jack: JackEngine::ClientExternalClose ref = 2 Jack: JackEngine::ClientCloseAux ref = 2 Jack: JackEngine::ReleaseRefnum server quit Unknown error... terminate called after throwing an instance of 'Jack::JackTemporaryException' what(): This is steady behaviour. On the Bitwig side the following will be seen: [2017-06-23 18:17:10 ramona-server error] Connection broken with client: java.net.SocketException: Socket closed jackd is 1.9.10+20150825git1ed50c92~dfsg-1ubuntu1 Bitwig is 2.1.1 Is there a fix for this ? Thanks.

8 years

Rated Blue - 32C Sessions LIVE Digital Album

by Glen MacArthur

Howdy LAU friends, Just passing along this blog post in case anyone is interested, http://www.bandshed.net/2017/06/21/rated-blue-32c-sessions-live-digital-alb… Thanks! Glen

8 years

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Linux-audio-user June 2017