Linux-audio-dev December 2012

linux-audio-dev@lists.linuxaudio.org

35 participants
36 discussions

by Pedro Lopez-Cabanillas

On Friday 06 January 2012, you wrote: > btw: is there a way to list available clients/ports from the api. > I know that aconnect -i / -o does this, but is there a c/c++ function? > > Dave The functions are: snd_seq_query_next_client() and snd_seq_query_next_port(); you need to loop calling these functions while they return a correct answer. For instance, this is the relevant code in "aconnect.c" : static void do_search_port(snd_seq_t *seq, int perm, action_func_t do_action) { snd_seq_client_info_t *cinfo; snd_seq_port_info_t *pinfo; int count; snd_seq_client_info_alloca(&cinfo); snd_seq_port_info_alloca(&pinfo); snd_seq_client_info_set_client(cinfo, -1); while (snd_seq_query_next_client(seq, cinfo) >= 0) { /* reset query info */ snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo)); snd_seq_port_info_set_port(pinfo, -1); count = 0; while (snd_seq_query_next_port(seq, pinfo) >= 0) { if (check_permission(pinfo, perm)) { do_action(seq, cinfo, pinfo, count); count++; } } } } See: http://git.alsa-project.org/?p=alsa-utils.git;a=blob;f=seq/aconnect/aconnec… I guess you already know the reference documentation site: http://www.alsa-project.org/alsa-doc/alsa-lib/seq.html Just for comparison, a similar enumeration using Drumstick looks like this: QListIterator<PortInfo> it(m_Client->getAvailableOutputs()); while(it.hasNext()) { PortInfo p = it.next(); cout << p.getClientName() << ":" << p.getPort(); } See Drumstick's example "drumgrid": http://drumstick.sourceforge.net/docs/drumgrid.cpp-example.html Regards, Pedro

11 years, 8 months

Four decks audio player for radio stations

by Adrian Knoth

Hi! I was recently helping a small Dutch radio station run by volunteers to set up their new studio. It's a modular system with a 16 I/O firewire card: http://www.d-r.nl/AXUM/AXUM.htm We managed to support it in FFADO. The playback software runs on a virtualised Windows machine that's talking to jackd via netjack (no idea which one, the one with multicast and netmanager), so we can address four individual stereo pairs. This whole netjack thing isn't very stable, so the playback software should be replaced by some native Linux client. Here's a screenshot of the current Windows solution: http://adi.loris.tv/radio.png It is basically a set of four remotely controlled winamps (with ASIO output plugin to talk to jackd) and a directory browser per player. So "Jingles", "Muziek" and "Bladeren" are just shortcuts to directories with media files, the drop-down menu on the left contains a list of even more directories. The filter is used for pattern matching. Questions: Are you aware of any Linux solution that comes close to this? If not, any recommendations if one would want to create such a four-deck player? Leveraging VLC, mplayer, gstreamer? This is surely going to be open source, so whoever is interested, feel free to participate. Cheers

12 years

Announcing PHASEX-0.14.96

by William Weston

Happy New Year! Yes, your eyes are working correctly. This is v0.14.96. Some things are worth the wait. I know it's been a while, but I haven't forgotton about PHASEX... just had to put it on the back burner for some time while life moves on. After more troubles than I'd like to go into detail about with the old server, old hosting arrangement, the old bug-ridden codebase, old laptop, and life in general, I've come back to "finish" what I've started (as if software projects ever "finish" these days...). Over the past eleven months, I've taken the time to overhaul most aspects of the PHASEX source code. After two failed attempts at going multitimbral, and two mishaps with the laptop dev tree and was supposed to be v0.12.0, I decided to bump the version twice, start the new development with v0.14.x, and move on. Here's the short list of what's new since v0.12.x: New Features: - Multitimbral (1 thread per part). - Session bank (very much like the patch bank). - Jack Session. - Stereo- and Multi- outputs for JACK. - ALSA PCM audio. - JACK MIDI. - ALSA Raw MIDI. - Generic MIDI (/dev/midi support). - MIDI clock for timestamping and queuing events. - Active Sensing. - New oscillator waveforms. - Portamento for Osc Transpose events. - FM oscillator latching. - New LFO parameters. - Moog (24db/octave) filter. - Fast fade-out mono retriggering. - Interpolated oscillator table lookups. - Ability to run with no GUI. - JACK MIDI / ALSA Raw / ALSA Seq connections in menus. - Widescreen layout mode. - New preferences dialog w/ nearly all settings. - New knobs. - Pure 64-bit math in builds with --enable-cpu-power=4. New Features from Anton Kormakov: - LASH. - MIDI Hold pedal. - JACK Transport. Bugs Removed and/or Squashed: - The "bad PHASEX noise" is gone. - GUI widget sensitivity is fixed. - Notebook tabs behave properly (and quickly). - Patch loading bugs are gone. - MIDI program change works dependably. - Spurious envelope triggering pops are gone. - Offsets for neg. filter env. now calculated properly. - Chopped portamento slides are fixed. - Keytriggering for all keymodes is fixed. - Voice stealing works as expected. - Chorus phase balance issues have been corrected. - System lockup on shutdown is a thing of the past. - Denormals don't eat up all the CPU anymore. Code Overhaul: - Build system overhaul. - Reorganization of source code. - Rebuilt data structures for multimbral architecture. - New driver layer (engine relies on no libraries). - Replaced pthreads based buffer synchronization code. - New lightweight patch parser / patch format. - New thread-safe MIDI event queue. - Restructured engine, GUI, and MIDI code. - Almost complete separation of GUI and engine. (still need to separate bank changes from the GUI.) Sources are available via git: git clone https://github.com/williamweston/phasex.git Number of parts is configurable at compile time (1-2 parts per core should be very dependable. Tested extensively with 8 parts on a quad-core.) As usual, YMMV: aclocal && autoconf && automake && autoheader ./configure --enable-arch=native --enable-parts=2 Overall, I am pleased with where PHASEX has arrived. In the past, I had always been disappointed with PHASEX and its shortcomings, and for many reasons. Until now. The code is cleaner and easier to work on. Most of the old bugs have been replaced with more intelligent design. On an -rt kernel, xruns are a thing of the past. Sound quality is cleaner. GUI is much more responsive. Dependence on the command line is kept to a bare minimum. Sessions can be managed with ease. Per part memory and CPU utilization has decreased vs. multi-instance v0.12.x. Timing is almost as good as it gets (sample accurate for JACK MIDI, near sample accurate for ALSA seq, and almost as good as your hardware will allow for ALSA raw MIDI.) All or the major barriers to use that I've identified over the years have been eliminated. I can actually sit down and work on some of those tracks that got shelved due to bad timing. Of all the new features and code, I am most pleased with the new MIDI clock. (Anyone interested in timing of MIDI events and successive audio buffer processing cycles can enable timing debug with '-d timing'. Once I finish putting all my notes together, a detailed explanation of the MIDI clock will follow.) The rest of the new features should be self-explanatory to readers of linux-audio-dev, so I'll spare the details (unless of course anyone asks). Many thanks go out to Anton Kormakov for his work on PHASEX and his git repo, which appear to have served the community well in the time since the old server went down. And of course, I'd like to thank the regular posters to this list (and linux-rt-users) for sharing the knowledge that's made this release possible. A lot of you have dropped some hints over the years about what the design of PHASEX (or any synth) really needs to perform well (or at least to not perform badly). I've been listening, as a lot of the work this year is a result of finally getting around to a lot of the suggestions made by members of linux-audio-dev. So please, enjoy the new PHASEX. This release aims to be as bug-free as possible (and IMHO, v0.14.96 is already more stable and trouble-free than any previous version). As is usual with GPL'ed software, there's no warranty whatsoever and I'm not responsible if you blow out your speakers (or your hearing), but please don't let that hold you back from trying it out. This version is fully tested with Fedora 17 and 18, and should be just as trouble free on any Fedora >= 14 or CentOS >= 6.0. At some point next month, I'll be rebuilding my RAID and dedicating some space to running other distributions. Until then, a request goes out for build reports from other distros, especially Debian/Ubuntu, Arch, and Mint. There's still time to get build files from other distros into the git tree before v0.15.0 comes out. So what do we do, now that the world didn't end? Let's make some music! Cheers, --William Weston

12 years

[LAA] Guitarix release 0.25.1

by hermann meyer

We are proud to announce the release of guitarix2-0.25.1 Guitarix is a mono tube amplifier simulation for jack, with additional mono/stereo effect racks witch can be filled with some in-build effects as well as with external LADSPA plugins. Download from http://sourceforge.net/projects/guitarix/ After having some discussions with David Robillard (thanks for your patience, David) I realize that I need to push out a update in order to avoid a possible violation of the LV2 specs, so guitarix2-0.25.1 is out, those how use the last V0.25.0, are strongly recommended to update. * GxAmplifier tube 12ax7 tonestack sovtek cabinet 4x12 * GxAmplifier-II tube 12AT7 tonestack soldano cabinet AC30 * GxAmplifier-III tube 6C16 tonestack bassman cabinet 1x15 * GxAmplifier-IV tube 6V6 tonestack soldano cabinet mesa * GxAmplifier-V tube 6DJ8 tonestack ampeg cabinet HighGain there are mono and stereo versions of those amps included in the bundle. Thanks goes to Richard Dalton from http://www.Ampskindesigns.com for given me permission to use (and distribute) his work within a GNU GPL project, many thanks Richard. thanks goes as well to David Robillard for his great work on the LV2 specs and to Rui Nuno Capela for implement them so excellent in qtractor. Please check it out and give feedback if you find a problem. Please refer to our project page for more information: http://guitarix.sourceforge.net/ download site: http://sourceforge.net/projects/guitarix/ have fun guitarix development team _______________________________________________ happy new year to all

12 years

[ANN] CAPS 0.9.1

by Tim Goetze

CAPS 0.9.1 ========== The C* Audio Plugin Suite is a selection of popular effects, unique filters and generators. For the digital guitarist, CAPS offers a range of processors recreating the formation of tone in traditional instrument amplification. Beyond sound quality, central design considerations are latency-free realtime operation, modest resource demands and meaningful control interfaces. http://quitte.de/dsp/caps.html This release contains major improvements particularly in the area of guitar signal processing, notably in the AmpVTS and CabinetIV plugins. These are the first iterations of the Amp and Cabinet designs that their author is well and truly happy with. Also worth noting here is the Compress plugin, a completely new design featuring optional oversampled soft saturation/limiting. http://quitte.de/dsp/caps.html#AmpVTS http://quitte.de/dsp/caps.html#CabinetIV http://quitte.de/dsp/caps.html#Compress http://quitte.de/dsp/caps.html#AutoFilter All plugins have been subject to further development, speedups, refinement and polishing. In many cases, this has been accompanied by the consolidation of shared or duplicate functions into a single circuit; for example, the AutoFilter plugin now fulfills the roles of the old SweepVF and AutoWah units. Many obsolete plugins have been removed, and everywhere else, port names, layouts, value ranges, defaults etc have been changed as well. Upgrading from previous releases is encouraged nonetheless. Enjoy!

12 years

New Year, New Hope, New LAC 2013!

by IOhannes m zmoelnig - LAC 2013 Organizing Team

Hi all, survived the end of the world? bored of new year's parties?? nothing to do during Xmas holidays??? This is a friendly reminder, that the deadline for submissions to the Linux Audio Conference (LAC 2013) is slowly but inevitably approaching. All works (papers, music, installations, workshops,...) must be submitted online by FEBRUARY 3. http://lac.iem.at/ happy music-and-paper-submissions, fgmasdr IOhannes - - - - - - - - - LAC 2013: the Linux Audio Conference - Call for Participation May 9-12, 2013 @ IEM, Graz/Austria sorry for >< please >> << We are happy to announce the next issue of the Linux Audio Conference (LAC), May 9-12, 2013 @ IEM, the Institute of Electronic Music and Acoustics, in Graz, Austria. The Linux Audio Conference is an international conference that brings together musicians, sound artists, software developers and researchers, working with Linux as an open, stable, professional platform for audio and media research and music production. LAC includes paper sessions, workshops, and a diverse program of electronic music. *Call for Papers, Workshops, Music and Installations* We invite submissions of papers addressing all areas of audio processing and media creation based on Linux. Papers can focus on technical, artistic and scientific issues and should target developers or users. In our call for music, we are looking for works that have been produced or composed entirely/mostly using Linux. The online submission of papers, workshops, music and installations is now open at http://lac.iem.at/ The Deadline for all submissions is February 4th, 2013 (23:59 HAST) You are invited to register for participation on our conference website. There you will find up-to-date instructions, as well as important information about dates, travel, lodging, and so on. This year's conference is hosted by IEM, Graz, in cooperation with local artists and FLOSS enthusiasts. The Institute of Electronic Music and Acoustics (IEM) at the University of Music and Performing Arts Graz is considered Austria's leading institution in computer music, acoustics and audio engineering and has gained international reputation for its research on spatial audio and its artistic production and research. IEM has been embracing Linux audio as a production and research environment since the mid-1990s, and has contributed to FLOSS/Linux projects, amongst others by providing drivers for multichannel audio interfaces and hosting the Pure Data community portal and mailing lists. http://iem.at/ We look forward to seeing you in Graz in May! Sincerely, The LAC 2013 Organizing Team

12 years

Re: [LAD] Announcing PHASEX-0.14.96

by William Weston

> ----- Original Message ----- > From: Jeremy Jongepier > > On 12/30/2012 05:42 AM, William Weston wrote: > > Yes, your eyes are working correctly. This is v0.14.96. Some things > > are worth the wait. I know it's been a while, but I haven't forgotton > > about PHASEX... > > > > Great! Congrats with this new release! > > > > > New Features: > > - Multitimbral (1 thread per part). > > So this means starting multiple instances has become unnecessary? Correct. Multi-instance worked, but it was a pain. Currently, number of voices is set at compile time, so be sure to run configure with --enable-parts=4, or however may parts you want to use. More than two parts per CPU core is not currently recommended, however. > > > - Session bank (very much like the patch bank). > > - Jack Session. > > - Stereo- and Multi- outputs for JACK. > > Nice! > > > - ALSA PCM audio. > > - JACK MIDI. > > Another nicety! > > > - ALSA Raw MIDI. > > - Generic MIDI (/dev/midi support). > > - MIDI clock for timestamping and queuing events. > > - Active Sensing. > > - New oscillator waveforms. > > - Portamento for Osc Transpose events. > > - FM oscillator latching. > > - New LFO parameters. > > - Moog (24db/octave) filter. > > - Fast fade-out mono retriggering. > > - Interpolated oscillator table lookups. > > - Ability to run with no GUI. > > This is very welcome too. > > > - JACK MIDI / ALSA Raw / ALSA Seq connections in menus. > > - Widescreen layout mode. > > - New preferences dialog w/ nearly all settings. > > - New knobs. > > - Pure 64-bit math in builds with --enable-cpu-power=4. > > > > > > New Features from Anton Kormakov: > > - LASH. > > - MIDI Hold pedal. > > - JACK Transport. > > > > And the Panic button? I had already implemented this as the "Notes Off" button before reviewing Anton's work. This probably should be renamed. > > Overall, I am pleased with where PHASEX has arrived. In the past, I > > had always been disappointed with PHASEX and its shortcomings, and for > > many reasons. Until now. The code is cleaner and easier to work on. > > Most of the old bugs have been replaced with more intelligent design. > > On an -rt kernel, xruns are a thing of the past. Sound quality is > > cleaner. GUI is much more responsive. Dependence on the command line > > is kept to a bare minimum. Sessions can be managed with ease. Per > > part memory and CPU utilization has decreased vs. multi-instance > > v0.12.x. Timing is almost as good as it gets (sample accurate for > > JACK MIDI, near sample accurate for ALSA seq, and almost as good as > > your hardware will allow for ALSA raw MIDI.) > > Cool! No more drifting arpeggios :) Unfortunately, I haven't got around to implementing LFO sync with the MIDI clock yet, so there still may be some drift. This MIDI clock currently handles event timestamping and MIDI/audio/engine thread synchronization, and does not yet handle phase sync. If you're running on a fast 64-bit processor, you can get better precision on the LFOs with a pure 64-bit build (--enable-cpu-power=4). > > This version is fully tested with Fedora 17 and 18, and should be just > > as trouble free on any Fedora >= 14 or CentOS >= 6.0. At some point > > next month, I'll be rebuilding my RAID and dedicating some space to > > running other distributions. Until then, a request goes out for build > > reports from other distros, especially Debian/Ubuntu, Arch, and Mint. > > There's still time to get build files from other distros into the git > > tree before v0.15.0 comes out. > > > > I have a source package ready for Ubuntu 12.04 but I can't build it yet > because of the current issues with Jack1. I could try building against > Jack2 but then I can't test it myself because I don't use Jack2. Try v0.14.97-dev in git: git clone -b v0.14.97-dev https://github.com/williamweston/phasex.git I haven't been able to verify the jack1 fixes yet, but I'm very hopeful. Cheers, --ww

12 years

Re: [LAD] phasex 0.14.96 git: compilation problem on linux mint 13 / ubuntu 12.04: CONFIRM

by William Weston

> ----- Original Message ----- > From: distrozapper(a)online.de > > Dear William, > > Thank you for being back! I hope life matters do run better for you. Have a nice century! ;) > I am glad you can care again about phasex, it is such a nice sound source to me! > > Alas there is a compilation problem on my linux mint 13 "maya" system, based on ubuntu 12.04. > > It complies with the bug report on http://permalink.gmane.org/gmane.linux.audio.devel/29006 > > A patch has been provided by falktx, the maintainer of kxstudio distro ( see below). > But it is only working for jack2 enabled system he says. No build for jack1 with this patch! > > My hardware is a Intel CoreI7 QM 1.7Ghz notebook with intel hda ALC269VB onboard. > > Configuration details: > > phasex 0.14.96 git > Distro= Linux mint 13 "maya", desktop environment= cinnamon, ubuntu 12.04 based > uname -a: Linux 3.2.0-35-lowlatency #34-Ubuntu SMP PREEMPT Tue Dec 18 18:12:15 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux > configure options : --prefix=/usr --without-lash --enable-cpu-power=3 --enable-arch=native > > ./configure report: > ... > * LIBS: ................. '' > * PHASEX_LIBS: .......... '-lasound -ljack -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0 -Wl,--export-dynamic -pthread -lgmodule-2.0 -lrt -lglib-2.0 -lsamplerate -lm -lpthread -lX11' > * > ****************************************************************************** > * > * PHASEX is now configured! Now run: > ... > > ISSUE: The make procedure stops reporting hundreds of "undefined references" concerning alsa and gtk, exactly as described in > http://permalink.gmane.org/gmane.linux.audio.devel/29006 > resp. http://pastesite.com/86896. > > falktx, being the maintainer of kxstudio distribution (IRC: freenode.net/#kxstudio), kindly provided me this temporary patch, which made the build process run successfully on my system, > but he notices urgently this won't build for jack1!! > > > *** BEGIN PATCH *** > --- phasex-0.14.96.orig/src/Makefile.am > +++ phasex-0.14.96/src/Makefile.am > @@ -52,8 +52,7 @@ endif > > AM_CFLAGS = @PHASEX_CFLAGS@ > AM_CPPFLAGS = $(EXTRA_CPPFLAGS) @PHASEX_CPPFLAGS@ > -AM_LDFLAGS = $(INTLLIBS) @PHASEX_LIBS@ > - > +LIBS = $(INTLLIBS) @PHASEX_LIBS@ > > clean-local: > > *** END PATCH *** > > This patch rendered a usable phasex 0.14.96 git/devel version on my ubuntu 12.04 system. Thanks! Applied to 0.14.97-dev. > I see the oscillator rate controls disabled atm, but phasex sounds OK, reacting fine via jack_keyboard MIDI input. Osc Rate is only used for Tempo and Tempo+Trig osc sources. For normal MidiKey oscs, the rate is set by the note in play. Parameters are only disabled when their values will be ignored due to other parameter settings. > Please contact falktx for more developer information exchange (he is quite busy with his new kxstudio release atm). > I am just a 64bit/jack2 user (but I am addicted to phasex@kxstudio ;) ) > > If you do, please give him my best regards, so as I do now to you: > > If I can be helpful for testing : Please let me know! > Thanks alot for this nice work! > > Cheers ! > > Robert Dietrich > distrozapper I will contact falktx before the next release. The few build fixes that have trickled in, along with inclusion of MIDI channel in saved midimaps, are in v0.14.97-dev, which has been started in git. This hasn't been tested with jack1, but it looks like it should work. Anyone still having build issues should grab the dev branch: git clone -b v0.14.97-dev https://github.com/williamweston/phasex.git I'm give it a few days before finalizing v0.14.97 in case any more changes are needed to build on other distros. Cheers, --ww

12 years

Re: [LAD] Announcing PHASEX-0.14.96

by Florian Paul Schmidt

On 12/30/2012 11:38 AM, Florian Paul Schmidt wrote: > On 12/30/2012 05:42 AM, William Weston wrote: >> Happy New Year! > > To you, too :D > > > >> >> Sources are available via git: >> >> git clone https://github.com/williamweston/phasex.git > > Sadly the build fails. After installing all dependencies indicated by > configure I get this (sorry, thunderbird has started messing up > formatting heavily at some point in the past): > http://pastesite.com/86896 Flo -- Florian Paul Schmidt http://fps.io

12 years

Re: [LAD] Announcing PHASEX-0.14.96

by William Weston

> ----- Original Message ----- > From: Jörn Nettingsmeier > > On 12/30/2012 05:42 AM, William Weston wrote: > > Happy New Year! > > > > Yes, your eyes are working correctly. This is v0.14.96. Some things > > are worth the wait. I know it's been a while, but I haven't forgotton > > about PHASEX... > > whoohooo! > > > just a quick feedback: distros that are moving to a unified /usr/bin > will need this patch: > > diff --git a/configure.ac b/configure.ac > index 5fb0368..3b2496c 100644 > --- a/configure.ac > +++ b/configure.ac > @@ -334,7 +334,8 @@ AC_DEFINE_UNQUOTED(PHASEX_GCC_MINOR, [$gccminor], > [Built with gcc minor version] > CPU_POWER_LEVEL=2 > ARCH_OPT_CFLAGS="" > ARCH_MATH_CFLAGS="" > -ARCH_BITS=`( file /bin/true | grep 'ELF 64-bit' > /dev/null && echo 64 > ) || echo 32` > +ARCH_TRUE=`which true` > +ARCH_BITS=`( file $ARCH_TRUE | grep 'ELF 64-bit' > /dev/null && echo 64 > ) || echo 32` > > because `file /bin/true` will return "/bin/true: symbolic link to > `/usr/bin/true'", which in turn will force the bitness to 32, which then > fails unless a full 32-bit environment is installed. Thank you. This is now in the dev tree. > now i'm hunting a couple errors wrt jack headers - my guess is that > PHASEX is being tested with JACK2 exclusively - it seems to rely on a > couple of types and methods which don't seem to be present in my jack1 > environment (more or less fresh from svn). You're absolutely right. I actually haven't tested with jack1 since adding JACK Session support. I'll have to check and see what else is jack2 only. Restoring jack1 support will be top priority for v0.14.97. Thanks again, --ww

12 years

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Linux-audio-dev December 2012