Linux-audio-user August 2010

linux-audio-user@lists.linuxaudio.org

118 participants
112 discussions

OT: UnTwelve announces its 2nd annual composition competition

by Aaron Krister Johnson

Hi all, Being a composer, and a 'Linux musician' myself, I thought at least a few of you might be interested in this opportunity. ###################################################################### [image: http://www.untwelve.org/untwelve-logo-small.jpg] *UnTwelve* proudly announces the 2nd annual composition competition, open to all ages and all nationalities. First prize is *$400.00 USD* We invite any composers interested in writing a 5-10 minute work (with appropriate specifications of tuning) before Dec. 15th to peruse the rules and regulations as posted online at the *UnTwelve* website: * http://www.untwelve.org/2010_competition.html * >From there you may register you email address with us and complete your online application and eventual audio file upload. Feel free to spread the word of this competition far and wide. We are interested in spreading the reach of our mission, and as such welcome the ability to encourage composers out of our normal communicative reach! We look forward to hearing your work! Best, The UnTwelve crew http://www.untwelve.org -- Best, Aaron Krister Johnson http://www.akjmusic.com http://www.untwelve.org

14 years, 11 months

irq sharing

by David Santamauro

Hi, I've decided to get back to diagnosing why my delta 1010 inputs have a background noise and stumbled across a few websites indicating that the problem could be irq sharing. My delta shares irq 20 with usb devices: $ cat /proc/interrupts |grep ICE 20: 1325915 1326971 1335010 1348560 1337725 1330100 1336582 1346152 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2, ICE1712 Is there a way to forcibly assign ICE1712 to another IRQ? I just want to test the theory. thanks David

14 years, 11 months

Really good Jack mixer?

by Jonathan E. Brickman

Anyone have software that can be used as a really good live Jack mixer? I'd love to see the usual controls on every channel, i.e., a virtualization of a real P.A. mixer, with user-selectable channel count :-) Has such a thing been made which works well ??? J.E.B.

14 years, 11 months

Inquiry regarding midi-filters

by Arnold Krille

Hi all, I do have a question for all the midi-freaks: I have a korg nanokontrol and would like to use it to control a mixer (behringer ddx, not my own). For faders this works quite well, for the mute- buttons I am stumped: The ddx wants ctrl 104 with the channel as value to mute and ctrl 105 with the channel to unmute. The nanokontrol can only send one controller with two different values per button. So I thought about making the nanokontrol send the channel as controller and 104 as value for mute 105 for unmute. And then use a midifilter to switch ctrl- number and value before sending it to the ddx. And this is where the fun begins. midish is not able to do that (at least I couldn't make it work during one evening). qmidiroute is not able to do that (at least I couldn't make it work during one evening). puredata is not able to do this. While it is easy to connect ctlin with ctlout and switch ctrl and value, it sometimes uses the value from the event before and I couldn't get that to work either... (If some pd crack can give me a hint, I am very open to that, the problem seems to be that the events are passed/handled in the wrong order.) Is there any other easy midi-router / -filter that even thinks about these use cases? (Note: I didn't yet try pidim...) Thanks for your answers, Arnold

14 years, 11 months

[LAM] 5-4-Acid

by James Stone

Hi All, Just posting a new track written using neil sequencer/tracker. It's an early 90s rave/acid sound with a twist.. Comments, suggestions, criticisms gratefully received! http://drop.io/5_4_acid James

14 years, 11 months

pidim: midi filters collection

by Benoît Rouits

Hello, It has been a long time i havent posted on LAU. Making a bit of advetising, I think some of you may like Pidim, a recent project i am workgin on. It is a collection of MIDI event filters and generators based on ALSA and Gtk+ (and it's GPLv2). Currently, it has a transposer, a 2 kind of routers and an arpeggiator. I would be glad if you send bugreports translations, improvements or new filter ideas. It integrates very well with an alsa/jack patchbay such as Patchage. You can checkout http://herewe.servebeer.com/pidim/ and the source is on http://herewe.servebeer.com/svn/pidim To build the binaries, have the GNU development tools, and run autogen.sh; make.. Thanks for testing, and happy music! -- Benoît

14 years, 11 months

Reverb and Samplerate

by Israel Lopes dos Santos

Hello Everyone I'm new at audio production and i need a little help. I'm recording some tracks using 24bit/48khz and I want to add some reverb to my vocals. I installed jconv and downloaded some impulse response files, but all of them was recorded at 16bit/44khz. It is possible to work with these files or I have to download impulse files that match my bit/samplerate to get a nice convolution effect? Can I convert this files to match my bit/samplerate without quality loss?? Thanks for help! Peace!!! -- Israel Lopes dos Santos "Todas as coisas cooperam para o bem daqueles que amam a Deus." Rm 8.28

14 years, 11 months

False Mondrian Studies

by Dave Phillips

Greetings, I've completed a series of four videos that use a single image source for their visual transformations. I used AVSynthesis to create the image sequences, Mencoder to encode them to AVI, and Kdenlive to finish the production. The audio tracks were created with a variety Csound-based instruments in AVSynthesis. http://www.youtube.com/watch?v=4ZrnknnKVEk http://www.youtube.com/watch?v=i5uGg3XZnkk http://www.youtube.com/watch?v=N3y1-lH98T0 http://www.youtube.com/watch?v=4_rGi8KzakA Lots of pretty colors and weird sounds. Enjoy 'em while they last. Best, dp

14 years, 11 months

amarok crashes

by Kevin Cosgrove

Hi there, I've been having trouble with amarok crashes; every 8-10 songs I get a segfault. This is primarily on one of my computers, the one I use most for music. The story about that computer over the period when I've been getting so many crashes is: - The operating system has been Mandriva 2007.0 and 2010.0 - The motherboard has been swapped - The on-board sound card was used on the now dead motherboard - A Hoontech card (Ensoniq AudioPCI ENS1371) is now used Throughout all of those changes, the amarok crashes seem to be at a higher rate, maybe skewed as it's where I do most of my music work. That's just odd to me. One thing that's different about this machine versus any of my others, it runs an AMD processor, specifically an Athlon 64-X2. Another difference is that I tend to run RT kernels on this box. Audacity runs very solidly on this machine, as do Ardour and JACK. I tried RhythmBox, but it crashes too. I'd really like to get a music player (one that can work with my ripped CD collection) running on this system. Amarok would be fine, as I used it elsewhere. What can I do folk? How can I troubleshoot this? I've already changed out nearly all the hardware (for other reasons) and nearly all the software. Thanks.... -- Kevin

14 years, 11 months

Tutorial on sidechain compression in Qtractor and a question about screencasting

by Jeremy Jongepier

Hello all, I've uploaded a new tutorial to YouTube: http://www.youtube.com/watch?v=pnAqk054g7E So using sidechain compression in Qtractor with the SC3 LADSPA plugin. Concerning screencasting, anybody any experience with this? For this tutorial I used recordMyDesktop, but it captures video to Theora, so after editing and uploading the quality degrades considerably. The big advantage of recordMyDesktop though is that it has JACK support and that the overhead is pretty small so I can still run my setup at a decent latency. I've also started playing around with FFmpeg. The video quality is waaaaay better if you capture to a lossless format but I'm having my thoughts on the audio part. I compiled FFmpeg myself with libjack-dev so it has JACK support. But FFmpeg apparently has troubles to keep up with latencies below 20ms, lots of xruns on the FFmpeg side (JACK doesn't complain though). And I have the feeling FFmpeg lags on the audio side. So I'm thinking about capturing the video part with ffmpeg and the audio part with jack_capture and mux the stuff later. But if anyone has any other suggestions, let me know. Best, Jeremy

14 years, 11 months

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Linux-audio-user August 2010