Linux-audio-user October 2008

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Open Source Musicians Podcast Episode #4

by Daniel Worth

Well nothing makes you feel stupider than forgetting the link. Sorry. www.opensourcemusician.libsyn.com.

16 years, 11 months

exporting ardour tracks with ecasound

by Shani Hadiyanto Pribadi

Hello I used ardour to record a song for my friend. He is the one who is going to mix it (in windows) so I need to export those tracks to individual files. I could use ardour's export track, but it seems to me that i have to export each track one by one, and that would be time consuming. So I use ecasound instead. The command was ecasound -b 128 -r -c -f:32,8,48000 -a:1 -i jack -a:1 -f:32,8,48000 -o file.wav I do engine-launch, and connect each output from ardour manually. After that i do start in ecasound. The resulting file is an eight-channel wav file. The thing is, I'm kinda confused on how to proceed from here. I know I have to split it into individual mono files, but how, and with what. can I use sndfile- or sox, or perhaps ecasound itself? Second question, does recording this way adds extra latency of 128 frames to the resulting file? How long is that, in ms? Third question, I stumbled upon this http://lalists.stanford.edu/lau/2004/07/0523.html Now you might ask why the "-ea:400" (amplify by 400%) at the end of each chain. Now I regret having this feature in Ecasound more and more each day, but due to backwards compability issues, we just have to live with it. Basicly when Ecasound mixes together 'n' chains, it scales the amplitude to 1/n. This results in surprising results in the above case where each source chain has audible signal only one channel and the scaling doesn't make sense. Thus we scale it back up (no loss of information, just awkward. Do i need to use -ea:800 to scale the automatic scaling ecasound did? Thank you

16 years, 11 months

Ionice

by David Baron

First found out about this goody because the new debsums daily cron check uses it. It has a real-time option. Should we be running stuff like jack, ardour and such using this or does the pam/rlimits or realtime-lsm take care of this?

16 years, 11 months

Open Source Musicians Podcast Episode #4

by Daniel Worth

Episode four of my podcast is out. This time we talk about OpenStomp, Rakarrack, Monome, Yamaha pianos, OLF and linux sampler. Enjoy! Dan Worth

16 years, 11 months

: Cracking sounds

by Mysth-R

Hi, I've got a strange behaviour with my midi controller and/or freebob/ffado. I made a pure data patch, with a midi learn function. So I can control everything with my midi controller. When I use jack with Freebob or ffado (I tested both) and a Presonus Firebox, I got cracking sounds every time I move faders, pots from my Midi Controler. When I use jack with alsa and a poor usb berhinger UCA202 it works perfectly : no cracking sounds I am running Gentoo, with a rt kernel. I configured the rtirq script. I tested it on a opensuse with rt kernel too, and it does the same. Could someone test my patch and tell me if he got cracks ? with firewire ? with alsa ? You will need at least pd-0.40 or more. Some externals, they are not necessary to hear sounds (bbogart (for popup), sigpack~, zexy, iemlib). The patch contain * 3 live loopers with effects * Master to set tempo, general volume, general pitch, and rooting + a preset/bank system. * a sub-patch with a DrumStation * a sub-patch with a small synth (TriOsc) To test rapidly you just have to click on the load bank button (on the bottom-left corner), and you should hear sounds from the TriOsc synth Then you can assign control clicking the green led under each control. The red one is to forget the assignement. here is the patch : http://mysthr.free.fr/Documents/LiverLooper-0.6.tar Thank you very much ! kind regards, Mysth-R -- * *************************************************************************************** * {^_^} Mysth-R {^_^} * <= Aide Auditive => * * http://myspace.com/mysthr * http://myspace.com/aideauditive * http://mysthr.free.fr/Joomla => Site dédié à l'audio sous Fedora/PlanetCCRMA. * ***************************************************************************************

16 years, 11 months

Standalone mixer.

by alex stone

Evening all. I'm searching for a standalone mixer to work with jack, so i can route some bits through it. Any number of channel strips would be ok, but the bigger the better. I'm also looking for a single gain strip, with meter, that will do the same thing for one stereo input / stereo output. (I'll settle for two mono gain meter strips as well.) I'm using dual boot Linux/Ubuntustudio Hardy, 32 and 64bit.. Any help would be welcome, and i'm using patchage, and Ingen, for patchbay, and plugin management respectively.

16 years, 11 months

Off-topic but related Opensource MIDI sequencer for Windows?

by Tomas Valusek

Hello, I'm a blind music teacher and I'm looking for accessible MIDI sequencer. There are quite a few OSS sequencers on Linux, but AFAIK none for Windows. That'S why I'm writing this here - is anybody considering to port any MIDI sequencer to Windows? Both Qt and Gtk+ are present on Windows, so the only problem could be an underlying audio/midi infrastructure. I hope one day an accessible solution usable both by visually impaired AND people with good vision users. I'd like to use such a sequencer as an educational tool, and it should work both on Linux and Windows. Best regards. Tomas Valusek

16 years, 11 months

Re: [LAU] Fwd: csDrummer 20080926

by Philippe Hezaine

Philippe Hezaine a écrit : > Schlagg a écrit : >> 2008/9/26 Grammostola Rosea <rosea.grammostola(a)gmail.com>: >> >>> Maybe an idea to make a drumset from it and make it suitable for gm midi >>> as much as possible? >>> >> >> I will check this out. If that's okay, it's possible to create a >> separate drumkit. > Hi, I hope Schlagg will aggree with this modest contribution. I've made a template for GM-drumkit. You have to fill in yourself the mono samples with two layers. In Drummer.orc you'll change #include "DrumKit.inc" to #include "DrumKit-GM.inc" Have fun. Hi again, Aïe! My post is too big. You'll find it here: http://philippe.hezaine.free.fr/spip.php?article47 -- Phil. Superbonus-Project (Site principal) <http://superbonus.project.free.fr> Superbonus-Project (Plate-forme d'échange): <http://philippe.hezaine.free.fr>

16 years, 11 months

[ANN] Qtractor 0.2.2 (flirty ditz) is out!

by Rui Nuno Capela

Qtractor 0.2.2 (flirty ditz) is out! ------------------------------------ Qtractor is an audio/MIDI multi-track sequencer application, written in C++ on top of Qt Software's Qt4 framework, having JACK and ALSA as its main infrastructures and Linux as native and exclusive platform. Specially suited to the lone-wolf composer, arranger and (re)creative music-maker personal home-studio, it still hopes to evolve as a fairly featured desktop audio/MIDI workstation or at least, a prototypal part of it ;) Release highlights: * Stephen Doonan joined documentation team and revised the user manual. * Spurious MIDI events recording bug ow fixed. * Audio track monitoring and plugin loop processing slightly improved if not fixed. * MIDI clip editor improved precision and correct snapping. * Multiple track mute and solo one-click toggling (NEW). * Better MIDI connection persistance across sessions. * Record-armed tracks aren't muted on playback anymore (NEW). * Optimized audio clip waveform caching and drawing. * Many more or less fixes (see change-log) Website: http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Download: - source tarball http://downloads.sourceforge.net/qtractor/qtractor-0.2.2.tar.gz - user manual http://downloads.sourceforge.net/qtractor/qtractor-0.2.2-user-manual.pdf Weblog (upstream support): http://www.rncbc.org License: Qtractor is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Features: - Multi-track audio and MIDI sequencing and recording. - Developed on pure Qt4 C++ application framework (no Qt3 nor KDE dependencies). - Uses JACK for audio and ALSA sequencer for MIDI as multimedia infrastructures. - Traditional multi-track tape recorder control paradigm. - Audio file formats support: OGG (via libvorbis), MP3 (via libmad, playback only), WAV, FLAC, AIFF and many, many more (via linsndfile). - Standard MIDI files support (format 0 and 1). - Non-destructive, non-linear editing. - Unlimited number of tracks per session/project. - Unlimited number of overlapping clips per track. - XML encoded session/project description files (SDI). - Point-and-click, multi-select, drag-and-drop interaction (drag, move, drop, cut, copy, paste, delete, split) - Unlimited undo/redo. - Built-in mixer and monitor controls. - Built-in connection patchbay control and persistence (a-la QjackCtl). - LADSPA, DSSI and native VSTi plug-ins support. - Unlimited number of plug-ins per track or bus. - Plug-in presets, programs and chunk/configurations support. - Audio/MIDI clip fade-in/out (linear, quadratic, cubic). - Audio clip time-stretching (WSOLA-like or via librubberband), pitch-shifting (also via librubberband) and seamless sample-rate conversion (via libsamplerate). - Audio/MIDI track export (mix-down, merge). - Audio/MIDI metronome bar/beat clicks. - MIDI clip editor (piano roll). - MIDI instrument definitions (a-la Cakewalk(tm)) - JACK transport sync master. - MMC control surface enabled. - Configurable keyboard shortcuts. Change-log: - Slight optimization in audio and MIDI meters refresh rate. - Another ancient bug has been squashed: MIDI events were being recorded even though recording wasn't rolling; spurious event times were being recorded due to an absent started queue. - Major fix applied to audio track monitor metering, and most importantly to plugin processing, correcting tentatively all audio buffer offsetting and slicing due on loop turnarounds. - Fixed a potential crash and/or simple record dismissal when changing properties of a track already armed for recording; prevent record engaged tracks from editing or removal. - Lighten up the connections line and highlight colors, as seen to fit best on some darker background themes. - Several icons refined with slight transparent shadowing. - Send/reset all MIDI buses and track controllers (ie. volume and panning) only when main transport playback is started, avoiding the pouring on eg. loop, playhead or tempo changes. - Pressing the Escape key also clears current selection in the main track-view and MIDI clip editor; resizing multiple events at once doesn't need help from Shift or Ctrl modifiers anymore. - DSSI and VSTi plugins get all their default parameters values reset on MIDI program change. - Several major fixes have been applied to the MIDI clip editor, regarding snap precision and correctness, most specially due on clips which weren't located on exact bar boundaries. - Brand new usability feature introduced: mute, solo and monitor toggling may now be applied to all tracks in session at once, when issued with either the Shift or Ctrl keyboard modifiers, which will set or reverse respectively all other tracks state. - Audio buses plugin chain may be also accessed and edited from the extended bus management dialog (View/Buses...). - MIDI meter level default color is now set distinct from the old lime-green one as in audio level meters. - MIDI clip editor is now a genuine top-level window, fixing all keyboard shortcut ambiguities with main application window. - Mixer splitter panes are now collapsible and optionally hidden. - Make MIDI instrument patch management a little more sane, as for preventing the accidental insertion of blank instrument names and automatic default bank/program selection in track properties. - All connections are now based exclusively on the textual client and port names, effective in particular to match MIDI bus ports with disregard to their volatile numerical identification. - MIDI file (SMF) header endianess fix (PPC users rejoyce:)) - Record armed tracks aren't muted for playback anymore, as this was a severe crippling nuisance regarding input monitoring and all mighty user experience after recording a simple take; for instance, as the bottom line goes, there's no need to un-arm a track from its record-enabled state anymore, for just recorded material get heard on immediate playback; kick on the jam! - Playhead position overflow fixed on negative MMC STEP commands. - Thumb-view width proportions now based on minimal slack session length instead of the auto-extending track-view contents width. - Optimize audio clip drawing, most specially on zoomed-out levels. - Bring the audio peak frames into some sort of cache, preventing recurrent peak frame buffer reallocation and trashing. Cheers && Enjoy! -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

16 years, 11 months

update of jkmeter

by Fons Adriaensen

Jkmeter-0.4.0 is now available at the usual place: <http://www.kokkinizita.net/linuxaudio/downloads> Jkmeter is a combined RMS/digital peak meter based on the ideas of mastering guru Bob Katz. New options in this release: -type k14 : K14 scale instead of the default K20. Use this for mixing to a higher average level. -A : Ambisonic (4ch) mode. -C : Adds a stereo correlation meter. Used on a Ambisonic B-format signal the correlation meter uses W and X, and indicates how 'forward' the sound stage is. Enjoy ! Ciao, -- FA Follie! Follie! Delirio vano e' questo!

16 years, 11 months

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Linux-audio-user October 2008