Linux-audio-user March 2009

linux-audio-user@lists.linuxaudio.org

120 participants
123 discussions

[LAU] m-audio audiophile pci > delta 66 breakout box / headphone

by Grammostola Rosea

Hi, I was wondering if it is possible to connect the breakout box of the delta 66 to the audiophile 24/96 pci? I want to connect my headphone to my maudio audiophile... \r

16 years, 10 months

[LAU] Connecting FTDI USB serial to ALSA Seq

by Ken Restivo

I'm building an Arduino-based MIDI pedalboard. The FTDI USB serial device does not show up as an alsa-seq device, but rather as a serial port. Some time ago, I remember downloading and using a small daemon someone wrote, which connected this serial port to an ALSA seq port. I have it somewhere on one of these computers, but I can't figure out where. Also, the Googling I've done has come up with lots of falst positives and not the actual goods. Anyone messed around with Arduinos and ALSA? Or know where this daemon might be? Thanks. -ken

16 years, 10 months

[LAU] LADSPA processing time for audio zeroes

by Ken Restivo

When a LADSPA plugin is being sent zeroes-- i.e. when the volume of the input data is down to nothing-- is it still sucking up CPU cycles? I understand from the JACK API that anytime a client gets a callback with data, it has to drop down and deal with the data and then return, even if the data is zero. But that could be lightweight, if the data are zero, or is that very compute-intensive for the plugin? I'm trying to build an outboard effects chain in various LADSPA hosts (JACK Rack, ecasound, AMS, others... haven't settled on one yet), and when I've got that plugin's volume MIDI'ed down to zero, I'd like it to not be dominating CPU cycles at that time. -ken

16 years, 10 months

[LAU] Fwd: JAMin and signal paths?

by Justin Smith

I meant to reply to the list, so I am forwarding our conversation to the list, in case anyone else needs the info. 1) input gain/balance connects to bypass. 2) bypass connects to eq OR delay 3) eq connects to crossover 4a) crossover low connects to compressor 1 4b) crossover mid connects to compressor 2 4c) crossover high connects to compressor 3 5) each of the 3 compressors connects to its own stereo width/balance unit 6) all of the width/balance units connect to the boost unit 7) boost unit connects to the limiter 8) limiter connects to the master volume 9) master volume connects to output 10) delay (up at bypass above) connects to output ---------- Forwarded message ---------- From: Justin Smith <noisesmith(a)gmail.com> Date: Sat, Mar 28, 2009 at 6:06 PM Subject: Re: [LAU] JAMin and signal paths? To: Julien Claassen <julien(a)c-lab.de> On Sat, Mar 28, 2009 at 6:01 PM, Julien Claassen <julien(a)c-lab.de> wrote: > Hello Justin! > Thanks a great deal for this explanation. I only have one question, which > is not about the way, which you described clearly. > But what is corssover (low, mid high) some kind of EQ, simple bandpass > filters? > Kindest regards > Julien > > -------- > Music was my first love and it will be my last (John Miles) > > ======== FIND MY WEB-PROJECT AT: ======== > http://ltsb.sourceforge.net > the Linux TextBased Studio guide > ======= AND MY PERSONAL PAGES AT: ======= > http://www.juliencoder.de > A crossover is a unit that gives three outputs for every input (so this is two in six out), there is a low pass output, a mid range output, and a high pass output. The cutoff for the low pass is the same as the lower band of the mid range, and the cutoff for the high pass is the same as the upper band of the midrange, thus it cuts the audio into three distinct signals.

16 years, 10 months

[LAU] first video from live ChucK gig w/modlys

by Atte André Jensen

Hi A couple of weeks ago I announced a gig with my electronic project, modlys. One of the audience recorded a couple of tracks on his mobile, and the first one is here: http://modlys.dk/video/fodspor_vcd.mp4 Only audio software running is chuck under linux. -- Atte http://atte.dk http://modlys.dk

16 years, 10 months

[LAU] Jconv

by alex stone

Fons, I'm having much enjoyment experimenting with Jconv, and have a further question. I've set up a multiple input output .conf, using your /impulse/copy function. It works really well, and i've been adding them up to my current test which is 18 ins, and 18 outs, being 16 ER's, and 2 Tails. (more or less.) This is with the "greathall". wav. (And the naming function works a treat, and makes things easy to see and identify quickly in a patchbay.) There's a lot more to do, including tweaking the ER start and finish points, but, and this is the Q: I can set the jconv outs, to ardours ins, and pan them, so the ER 'image' is in the same location aurally (roughly, for now) as the dry signal. But is it possible to 'pan' the ER within the .conf itself, per in and out, including the impulse/copy ins and outs? Or can i only do this within Ardour, or another app? At the moment, everything's coming out in the middle, and i'm considering adding busses to create a panned sound image. (At this stage of template building, anyway) Alex. -- Parchment Studios (It started as a joke...)

16 years, 11 months

[LAU] firewire newbie in trouble

by Atte André Jensen

Hi I went ahead and got myself a edirol fa-66. Having no experience with firewire I have no idea why it doesn't work. The problem is that jack (qjackctl) seems to start up fine, but dies after a few seconds. My jack settings are IMO conservative: buffer size of 256. Here's what's printed in "messages": 19:39:10.306 Patchbay activated. 19:39:10.354 Statistics reset. 19:39:10.364 Startup script... 19:39:10.365 artsshell -q terminate 19:39:10.403 ALSA connection graph change. 19:39:10.787 Startup script terminated with exit status=256. 19:39:10.788 JACK is starting... 19:39:10.788 /usr/bin/jackd -R -P80 -m -dfreebob -dhw:0 -r48000 -p128 -n3 -D 19:39:10.790 JACK was started with PID=10604. jackd 0.109.2 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. Freebob using Firewire port 0, node -1 19:39:10.989 MIDI active patchbay scan... 19:39:10.992 ALSA connection change. 19:39:11.192 MIDI active patchbay scan... 19:39:11.715 ALSA connection graph change. libiec61883 warning: iec61883_cmp_create_p2p_output: Failed to set the oPCR[0] plug for node 0. LibFreeBoB ERR: Could not do CMP for connection 0 FreeBoB ERR: Could not start streaming threads DRIVER NT: could not start driver cannot start driver 19:39:11.793 MIDI active patchbay scan... 19:39:11.795 ALSA connection change. 19:39:31.721 Could not connect to JACK server as client. - Overall operation failed. - Server communication error. Please check the messages window for more info. jackd watchdog: timeout - killing jackd could not attach as JACK client (server has exited) 19:39:31.918 ALSA connection graph change. 19:39:31.919 JACK was stopped successfully. 19:39:31.919 Post-shutdown script... 19:39:31.920 killall jackd 19:39:31.920 JACK has crashed. jackd: no process killed 19:39:32.335 Post-shutdown script terminated with exit status=256. 20:27:22.325 MIDI active patchbay scan... 20:27:22.327 ALSA connection change. 20:27:22.528 MIDI active patchbay scan... What I did + info about my system (ubuntu 8.04): atte@vestbjerg:~$ uname -r 2.6.24-21-rt atte@vestbjerg:~$ lsmod | grep 1394 dv1394 20664 0 raw1394 29400 0 ohci1394 34096 1 dv1394 ieee1394 95544 4 dv1394,raw1394,sbp2,ohci1394 atte@vestbjerg:~$ grep disk /etc/udev/rules.d/40-permissions.rules ATTRS{removable}!="1", GROUP="disk" KERNEL=="raw1394", GROUP="disk" ATTRS{type}=="0", GROUP="disk" atte@vestbjerg:~$ grep disk /etc/group disk:x:6:atte This is what dmesg says when plugging the fa-66 in: [ 3824.579054] ieee1394: Node changed: 0-01:1023 -> 0-00:1023 [ 3824.579064] ieee1394: Node suspended: ID:BUS[0-00:1023] GUID[0040ab0000c37a87] [ 3830.249545] ieee1394: Error parsing configrom for node 0-00:1023 [ 3830.249623] ieee1394: Node changed: 0-00:1023 -> 0-01:1023 [ 3831.383625] doh, someone wants to mess with state set [ 3831.453179] ieee1394: Node resumed: ID:BUS[0-00:1023] GUID[0040ab0000c37a87] Besides this, I'm not sure what to look for. Any help appreciated! -- Atte http://atte.dk http://modlys.dk

16 years, 11 months

[LAU] JAMin and signal paths?

by Julien Claassen

Hello Everyone! I'd like to know the basic signal path for the JAMin effects.I know there is a diagram, but useless to sightless eyes. :-) So could anyone please tell me, how the basic effect (EQ, compressor, Limiter, stereowidth) are concatenated? If you wonder, which way is best: Fake ecasound Chainsetup, serialised tree like this: root(left_1(left_2,right_2),right_1(left_3)) That is only in case it gets complicated. Kindest regards and thanks in advance Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

16 years, 11 months

[LAU] SuperCollider Workshop at [Studio XX] in Montreal

by nescivi

Hiho, I'll be teaching a SuperCollider workshop in Montreal in the next month, details below! sincerely, Marije Studio XX :: Atelier Supercollider Workshop : Marije Baalman <Http://www.studioxx.org> French Below SuperCollider workshop with Marije Baalman Studio XX welcomes audio artist Marije Baalman between April 20th and May 11th who will undertake a four (4) session SuperCollider Workshop. SuperCollider (SC) is an environment and programming language for real-time audio synthesis and algorithmic composition. (SC) provides an interpreted object-oriented language which functions as a network client to a state-of-the-art, real-time sound synthesis server. SuperCollider was written by James McCartney over a period of many years, and is now an Open Source project maintained and developed by various people. It is used by musicians, scientists, and artists working with sound. The workshop will teach participants how to make synths in SuperCollider, how to use them with pattern structures and how to use input devices. Using a combination of teaching materials and practical exercises, workshop participants will build components to used in a final composition. The workshop will be taught on a Linux system, but SC can also be run on OSX (>10.4) and Windows. The version used in the workshop will be 3.3 (the latest stable release), available from Sourceforge. Participants may bring their own laptops with SC installed, or use the computers in The XX Lab. Dates: Every Monday from 6PM to 9PM, April 20th util May 11th 2009 Cost *: 200$ The workshop will be taught in English. For information: 514.845.0289 or by e-mail <http://www.studioxx.org/en/contact> * Workshop particants must be members of Studio XX. * Men are welcome on a space-available basis. Marije Baalman studied Applied Physics at the Technical University in Delft, Netherlands and graduated in 2002 in Perceptual Acoustics. In 2001/2002 she followed the Sonology Course at the Royal Conservatory in The Hague. She completed her Ph.D. on Wave Field Synthesis and electro-acoustic music in 2007 at the Electronic Studio of the Technical University of Berlin. She is currently a post-doctoral researcher in Computation Arts at Concordia University in Montreal. Her research explores the use of wireless networks for live performance (such as dance and music), and installations. Baalman has performed and exhibited across Europe (STEIM,WORM (NL), EXIT Festival (F), Club Transmediale (D) and beyond (Electrofringe (AU). She collaborated with Chris Salter and Michael Schumacher on the dance performance Schwelle, and with the Attakkalari Centre for Movement on their most recent production Chronotopia, which premiered at their India Dance Bienniale, February 2009. Baalman founded the Institute for Predictive Sonobotanics with Alberto de Campo, whose work has been exhibited throughout Europe. She is a contributor to The SuperCollider Book to be released shortly by MIT Press. Course outline: Week 1: * Introduction to SuperCollider (Help, documentation, executing code). * Creating and manipulating SynthDefs + Synths. Week 2: * Patterns: creating musical phrases and compositions. Week 3: * Using input devices (HID, joysticks, gamepads, etc.) to manipulate synths and patterns operational systems. Week 4: * Additional topics (participants' requests). More on SuperCollider: http://supercollider.sourceforge.net/ More on the teacher: http://www.nescivi.nl ------------------------------------- Atelier SuperCollider avec Marije Baalman Studio XX accueille l'artiste sonore Marije Baalman entre le 20 avril et le 11 mai afin de partager son savoir-faire lors d'un atelier SuperCollider. SuperCollider est un environnement et un langage de programmation pour la synthèse audio en temps réel et la composition algorithmique. Il est développé pour Linux et Mac OS 9, OSX. La programmation se fait en C et C++. SuperCollider a été écrit par James McCartney sur une période de plusieurs années et est à présent maintenu et développé par plusieurs personnes. Il est utilisé par des musiciens, des scientifiques et des artistes qui travaillent le son. Durant l'atelier, les participant(e)s apprendront à fabriquer des synthétiseurs dans SuperCollider et à les utiliser avec des structures en motif. Ils verront aussi comment utiliser des appareils de capture de données. La formation se déroulera en alternance d'exposés, de démonstrations et de travaux dirigés durant lesquels les participant(e)s construiront les composantes à utiliser dans une composition finale. L'atelier sera donné sur la plateforme Linux, mais SuperCollider fonctionne aussi sur OSX (>10.4) et Windows. La version utilisée durant l'atelier sera 3.3 (la dernière version stable), qui est disponible sur Sourceforge. Les participant(e)s peuvent apporter leur propre ordinateur avec SuperCollider installé, ou utiliser les ordinateurs du laboratoire XX. Dates : Tous les lundis de 18h à 21h entre le 20 avril et le 11 mai 2009 Prix* : 200$ L'atelier sera donné en anglais. Informations: 514.845.0289 ou par courriel <http://www.studioxx.org/fr/contact> * Les participantes à tous nos ateliers doivent être membres du Studio XX. * Les hommes sont bienvenus dans la mesure des places disponibles. Marije Baalman a étudié la physique appliquée et est diplômée en acoustique perceptuelle à l'Université technique de Delft, Pays-Bas (2002). En 2001/2002, elle a suivi un cours de sonologie au conservatoire Royal de La Haye. Elle a complété un doctorat sur la synthèse de front d'ondes et la musique électroacoustique à l'Université technique de Berlin en 2007. Elle est présentement chercheure post-doctoral au département de design et d'art numérique de l'Université Concordia. Sa recherche concerne l'utilisation des réseaux sans fils lors de performances en temps réel (comme la danse et la musique) et les installations. Son travail a été présenté en Europe (STEIM, WORM (NL), EXIT Festival (F), Club Transmediale (D) et au delà (Electrofringe (AU). Elle a collaboré avec Chris Salter et Michael Schumacher sur la performance Schwelle, ainsi qu'avec le Attakkalari Centre for Movement lors de leur récente production Chronotopia, présentée pour la première fois au festival biennal Attakkalari India Dance en 2009. Elle a fondé The Institute for Predictive Sonobotanics avec Alberto de Campo, dont le travail est présenté à travers l'Europe. Baalman a contribué à l'écriture du livre The SuperCollider Book à paraître aux éditions MIT Press. ------------------------------------- STUDIO XX <http://www.studioxx.org/> <http://www.studioxx.org/>STUDIO XX <http://www.studioxx.org/> 4001, rue Berri, espace 201 . Montréal . Québec . H2L 4H2 . tél: 514-845-7934 ateliers : (514) 845-0289 / http://www.studioxx.org Le Studio XX est un centre d'artistes féministe engagé dans l'exploration, la création et la critique en art technologique. Fondé à Montréal en 1996, il vise à mettre de l'avant la multiplicité des territoires, voix et actions créatives des femmes dans le cyberespace. Founded in 1996, Studio XX is Montreal's foremost bilingual feminist digital resource centre. Through a variety of creative activities and initiatives, the Studio works with women to demystify digital technologies, critically examining their social aspects, facilitating women's access to technology and creating and exhibiting women's digital art. Le Studio XX remercie ses membres et ses partenaires pour leur soutien : Le Conseil des arts du Canada, Le Conseil des arts et des lettres du Québec, Patrimoine canadien, le Conseil des arts de Montréal, la Ville de Montréal, Emploi Québec et le Conseil québécois des ressources humaines en culture. Studio XX thanks its members and Partners for their generous support: The Canada Council for the Arts, The Conseil des arts et des lettres du Québec, Canadian Heritage, the Conseil des arts de Montréal, The City of Montréal, Emploi Québec and The Conseil québécois des ressources humaines en culture. logo Conseil des arts et des lettres du Québeclogo Conseil des arts du Canadalogo Patrimoine canadienlogo Emploi Québeclogo CQRHClogo Conseil des arts de Montréallogo Ville de Montréal -------------------------------------------------------

16 years, 11 months

[LAU] Looking for noteeditor with chordnames and midi export

by Alex Polite

I'm looking for a note editor for linux to input scores from fake books. I'm just staring out with the piano and I want to use the generated midi to help me in my right-hand and left-hand practice. So here are my criteria: 1) Can use chord symbols as input and print chord symbols. 2) Can export to midi and also export staves separately. 3) Can change tempo of exported midi. 4) Textbased or gui doesn't matter. Another really cool feature would be Midi -> Fake book style conversion. ie I input a midi file and get back an easy to read piece of sheet music, with chord names. (If I import an average midi file to Rosegaren the resulting sheet music will be a tangle way to hard to read for a beginner like myself.) alex -- http://pipedreams.polite.se/about/

16 years, 11 months

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Linux-audio-user March 2009