Linux-audio-dev

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7501 discussions

[ANN] Jacker 2010.9.21 - A MIDI tracker for JACK

by Leonard Ritter

A new version of Jacker is out: http://bitbucket.org/paniq/jacker Changes: * Command-Line support. If a song name is passed to Jacker at startup, it will load it. * "install" command. You can now install Jacker globally. * New logo. Less glossy, more elegant. * Fixed a terrible timing error that introduced a jitter as big as the current latency. * Default number of tracks raised from 8 to 16. * Tracks can be renamed. Double-click track to pick a new name. * Mute buttons for each track. Not that reliable at the moment. Last played sound may hang. In this case, stop, then continue playing. * MIDI input to connect your keyboard, to test sounds before you track them. Click on a track label to route your keyboard to the particular output. * Initial JACK transport support. It's useful for synchronizing a recording to a DAW like Ardour. Can be switched on with the "Sync" button in the toolbar. Not too stable on start-up and loop borders. When in trouble, stop, seek, then start.

14 years, 9 months

any pointers for RT kernel for ARM?

by nescivi

Hiho, I managed to get SuperCollider and JACK running on my IGEP [1], on the pre- configured Ubuntu on the SD, but of course the audio is still bumpy. So... I'm looking for a RT kernel for this little machine... Anyone have any pointers? I did find this one: http://beagleboard.org/project/omap-rt-patch/ but the project doesn't show much recent activity. and... I also noticed that JACK didn't want to run with alsa as backend; oss as backend works though (but gives the bumpy sound). Anyone willing to share their experiences doing linux audio on ARM processors? sincerely, Marije [1] http://www.igep-platform.com/

14 years, 9 months

L2Ork North Carolina Mini-Tour

by Ivica Ico Bukvic

Please pardon the cross-posting as well as the belated nature of the message. L2Ork Virginia Tech's Linux Laptop Orchestra is back on tour Sept. 19-21st with performances at Duke University, WSSU, and UNCG as part of the New Music Festival (http://uncgnmf2010.org/). For additional info on performances: http://l2ork.music.vt.edu/main/?page_id=21 About L2Ork: http://l2ork.music.vt.edu/main/ http://l2ork.music.vt.edu/main/?page_id=5 L2Ork on Facebook: http://www.facebook.com/group.php?gid=117918141555131 L2Ork PD resources including custom version of Pd extended and supporting externals (under construction): http://l2ork.music.vt.edu/main/?page_id=56 Should you happen to have any questions, suggestions or concerns, please do not hesitate to contact me. Best wishes, Ivica Ico Bukvic, D.M.A. Composition, Music Technology Director, DISIS Interactive Sound & Intermedia Studio Director, L2Ork Linux Laptop Orchestra Assistant Co-Director, CCTAD CHCI, CS, and Art (by courtesy) Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-6139 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/faculty/bukvic/

14 years, 9 months

RME HDSPe RayDAT sync problems

by Natanael Olaiz

Hi, Does anyone knows if is possible to make a RME HDSPe RayDAT work properly under Linux? I cannot make it sync correctly with the adat outputs, even if in the alsamixer I select "Sample Clock Source": "Internal 48Khz", the slave devices got sync as 44.1Khz, and it doesn't sound properly (not only the SR). I only found by google some mails by Fernando, Florian and a few others, but any of those helped me to make it work. I also tried changing HDSPM_freqReg to 100 MHz (see [1]) but didn't seem to help (anyway, on monday I'll do further tests with that). Any news on that? Can someone give me some hints to make further tests? Thanks in advance, Natanael. [1] http://www.mentby.com/dougall-irving/rme-hdspe-raydat.html

14 years, 9 months

ADAT digital audio receiver and transmitter circuit

by Niels Mayer

Is there a mass-market (a cheap module from china/taiwan/hongkong) equivalent of the OptoRec and OptoGen , which could be usefully hooked up to a few of these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230418195291 to make a useful multichannel D/A for an ADAT lightpipe ; the optorec could likewise be paired with external A/D's or used to "vampire" an I2S signal from external digital gear w/o digital outputs. Also, experience with assembling and/or using the OpenRec/OptoGen? http://electronics.dantimax.dk/Kits/Digital_audio/11329401182.html .................. OptoRec and OptoGen ADAT digital audio receiver and transmitter circuit These kits is [sic] an 8-channel interface circuit using the ADAT protocol. They supports the sample rates 44.1 and 48kHz and up to 24 bits. The boards can be used for adding an ADAT input to a DAC, an ADAT output to an ADC or for DIY projects. The receiver board includes an ADAT input, ADAT output, a wordclock input and I2S outputs. The transmitter board includes an ADAT output and I2S inputs. The kits use SMD parts, so some SMD experience may be needed to assemble the board. SOT-23-5 parts are used, so a fine-tipped soldering iron (or SMD tools) is needed. .................. It's that "SMD experience" needed part that really gets me. I will invariably get a blob of solder bridging two SMD pins, and then in the course of trying to correct my mistake manage to get it bridging a few more pins and melting the ic or lifting the pad of the pc board. there's a reason i went into software. The undo key. Niels http://nielsmayer.com

14 years, 9 months

[ANN] DSSI 1.1.0 release

by Sean Bolton

Announcing the DSSI Soft Synth Interface version 1.1.0 release: http://dssi.sourceforge.net/ DSSI is an audio plugin API for software instruments and effects, based on LADSPA, the ALSA sequencer event types, and OSC (Open Sound Control) communications. DSSI is now supported by six full-featured hosts, several specialized hosts, and at least twenty-four DSSI plugins. (See the above URL for a list.) New in the DSSI 1.1.0 release: * New jack-dssi-host command line option '-c' to set the ALSA and JACK client names. * New 'dssi_list_plugins' and 'dssi_analyse_plugin' command line tools. * Example GUIs have been updated to Qt 4. Bugfixes: * Fixed jack-dssi-host ALSA client ports to be of type 'application'. * Fixed the MIDI CC mapping in trivial_synth. * Fixed an uninitialized variable bug in less_trivial_synth. Enjoy! Sean Bolton

14 years, 9 months

Mouse/knob interaction

by Gordon JC Pearce

This is going to stir up a bit of discussion! Rotary knob GUI elements - should you move the mouse in a circle to operate them, or up and down? What about side to side? Gordon MM0YEQ

14 years, 9 months

[ANN] Linux.conf.au 2011 multimedia miniconf: call for papers

by Jonathan Woithe

Continuing the tradition from past conferences, the LCA Multimedia Miniconf is back at Linux.conf.au 2011 (LCA2011). Linux.conf.au 2011 will be hosted in Brisbane, Australia from 24-29 January 2011 with the miniconfs being held over the first two days. For more information about the conference check out http://lca2011.linux.org.au/. Multimedia encapsulates a wide variety of topics: composition and playpack of video, audio and music. Submissions are now invited from those interested in giving presentations or short tutorials at the Multimedia miniconf on any topic related to opensource multimedia software, such as the following: * exciting new additions to existing software * development of new multimedia programs * how to set Linux up for multimedia composition, authoring and/or playback * great user experiences with open source multimedia software * legal issues surrounding multimedia content and its use with open source software * descriptions of multimedia workflows: tools used, process followed, and so forth * upcoming features in low-level infrastructure (JACK, ALSA, PulseAudio, etc) * any other open source multimedia topic we haven't thought of It is expected that most of the miniconf presentation slots will be around 20 minutes with question time to follow. We may be able to accommodate longer 50 minute presentations depending on the number of proposals offered. In addition, time will be allocated for 5 minute "lightning talks". Projection facilities will be available. Please note that in line with linux.conf.au guidelines miniconfs cannot receive funding, nor can they provide travel or accommodation assistance. In general presenters and attendees at miniconfs must be registered for LCA2011 although miniconf-only registration can be arranged - contact the multimedia minconf organisers for more information. To submit a proposal please send the following to lca-mm(a)lists.annodex.net or one of the organisers by Thursday 6 October 2010 00:00 UT: * your name and preferred email address * the title of your talk * a brief abstract describing what you want to talk about (up to about 500 words) * your preferred presentation length For more information about the miniconf please refer to the website http://www.annodex.org/events/lca2011_mmm/ or contact one of the organisers (Jonathan Woithe, Silvia Pfeiffer, Roderick Dornan - addresses are on the website). Regards Jonathan Woithe LCA2011 Multimedia miniconf organiser

14 years, 9 months

mudita24 summing pct outs

by David Santamauro

I was playing with alsa arecord and daring to brave a .asoundrc for my delta 1010. I set up a multi-out and monitor mix to grab the digital mixer output [1] pcm.delta1010 { type hw card M1010 device 0 } # send to all outputs: pcm.multi { type plug ttable.0.0 1 ttable.0.1 1 ttable.0.2 1 ttable.0.3 1 ttable.0.4 1 ttable.0.5 1 ttable.0.6 1 ttable.0.7 1 ttable.0.8 1 ttable.0.9 1 slave.pcm delta1010 } pcm.mix { type plug ttable.0.10 1 # digital mix left ttable.1.11 1 # digital mix right slave.pcm delta1010 } Monitoring with mudita24, I see the individual levels well below +0 but the digital mixer showing OVER (well, peaked). 2 questions: 1) is this correct to sum the individual pcms (seems that's what it's doing) and 2) is that even correct? recording with arecord -c2 -r44100 -d10 -fS32_LE -V stereo never showed OVERs. Any insight? thanks David [1] http://alsa.opensrc.org/index.php/1712_.asoundrc

14 years, 9 months

Re: [LAD] Basic Question: SND/SOUND Libraries Seem to be Missing

by Rory Filer

On Mon, Sep 13, 2010 at 11:01 AM, Robin Gareus <robin(a)gareus.org> wrote: > On 09/13/2010 07:49 PM, Rory Filer wrote: > > On Sun, Sep 12, 2010 at 2:40 PM, Robin Gareus <robin(a)gareus.org> wrote: > > > >> > >> > >> Hi Rory, > >> > >> You're not missing a library but some other kernel modules which provide > >> those symbols. > >> > >> After installing the kernel, run 'depmod' and try to load the module > >> with 'modprobe snd-dummy' instead of 'insmod snd-dummy.ko'. > >> > >> > > Hi Robin, > > > > I appreciate your reply. Unfortunately my embedded system doesn't have > > depmod configured so I'll have to try adding it to Busybox first. > > depmod/modprobe is basically just a handy way to automatically load > module dependencies. It may or may not be overkill for an embedded system. > > FWIW, you should be able to run 'depmod' to generate modules.dep on the > system where you built the kernel. The target system only needs modprobe. > > Did you try to run 'insmod snd.ko snd_pcm.ko' manually before the > 'insmod snd-dummy.ko'. That should work as well. > > Hi Robin, It was reply-to munging that got me on that previous reply. I think there might be some weird stuff with the build/make utility on my target which builds the sound files but isn't seeming to include them in my kernel image. I'll try and figure out all that before rattling the list again. Thanks for your assistance. Rory

14 years, 9 months

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Linux-audio-dev