Linux-audio-user March 2010

linux-audio-user@lists.linuxaudio.org

132 participants
139 discussions

by Josh Lawrence

hi everyone! I've been looking for a simple, MIDI-controllable synth to play with, something without a lot of complexity. I found jackMidiSynth.c here: ftp://ftp.suse.com/pub/people/mana actual file: ftp://ftp.suse.com/pub/people/mana/jackMiniSynth.c not being a programmer, I'm not sure how to compile it (I'm used to ./configure, make, make install); can someone help me out with the proper way to get this going? thanks everyone, Josh -- Josh Lawrence http://www.hardbop200.com

15 years, 1 month

Re: [LAU] A crazy idea

by Joan Quintana

Here are my three solutions. The common part: a system based on arduino with a combination of sensors (effect hall for speedness, various effect hall for cadence, and an accelerometer). With all this information, you can calculate and simulate an rpm signal. to produce sound I think in various options. a) project arduino buzzer. It's easy to produce sound with a buzzer, may be not very realistic compared with a real engine. To amplify the sound, a parallel electronic project: a microphone, a motorbike battery, loudspeakers, and the corresponding amplfying circuit. (and a backpack). b) it is possible to synthesize sound inside an arduino. I already made the experiment that you can find in the documentation: from a small wav file, convert the information into bits, and put them inside the small eeprom arduino memory. The interesting thing (I did'nt tried), is to use external EEPROM memories, so you have more memory for bigger wav files. Amplification is also necessary. (I'm in my smartphone and I can't post the references). c) with arduino you can produce easily serial midi messages. Connect the arduino to a computer, and with ttymidi (alsa client) you can easyly catch the serial information and redirect the messages to fluidsynth. Previously, with swami, sample a real engine. Try with pitch bend messages a realistic acceleration. You will need also a backpack, and depending ot the noise you want to produce, external amplification. Notes: -I think that the backpack will be compulsive, if you want to compete with real engines. -ever that I say easily I mean that it took to me a lot of effort the first time. Hope this helps, Joan Quintana www.joanillo.org

15 years, 1 month

USB Speakers

by Kevin Cosgrove

I got this in my inbox today and thought it might be of interest to LAU. If these speakers work on one distro, it's usually only a matter of time, maybe milliseconds, for them to work on other or all distros. Cheers.... ------- Forwarded Message ************************************************** Date: Thu, 4 Mar 2010 02:19:03 +0100 Subject: Mandriva extends its range: Discover LaCie loudspeakers / Cabasse! ************************************************** Mandriva widens its range of certified products and from today offers the result of the collaboration between LaCie and Cabasse (one of the world's leading acoustic system manufacturers since 1950). The Sound2 Speakers represent a major evolution from previous generations of USB speakers. And high quality sound doesn't necessarily mean pricey. The Sound2 Speakers deliver an astonishing quality of sound: http://store.mandriva.com/product_info.php?products_id=491 Offer reserved to France, Germany, Belgium, the Netherlands, Luxembourg, Great Britain, Italy, Spain, Austria, Denmark, Ireland and Portugal. Mandriva Team ------- End of Forwarded Message -- Kevin

15 years, 1 month

Arch Linux realtime kernel?

by Jonathan E. Brickman

Is there a standard or semistandard realtime kernel available for Arch Linux? J.E.B.

15 years, 1 month

Re: [LAU] ambiophonics vs. ambisonics?

by Martin Leese

J?rn Nettingsmeier <nettings(a)folkwang-hochschule.de> ... > and there's an excellent MAG article about using 4 speakers for better > stereo replay here: > http://www.audiosignal.co.uk/Resources/Surround_sound_from_2-channel_stereo… > nothing to do with ambisonic decoding, though. This is just the old Hafler circuit. It doesn't really compare with Ambisonics. Gerzon's contribution to the Hafler circuit was the addition of a blend or rear spread control between the rear speakers and ground. This is described in his later article "A year of surround-sound", also available at The Gerzon Archive: http://www.audiosignal.co.uk/Gerzon%20archive.html The Hafler circuit is also available at: http://members.tripod.com/martin_leese/Audio/ Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/

15 years, 1 month

Fractally fuzzy music?

by david

I've thought about a "music" in which notes might have "fractal fuzziness" to them - for example, what looks like a quarter note is really 8 simultaneous (or non-simultaneous) 32nd notes, each having a frequency that is some fractally-derived distance from the base quarter note's frequency, and perhaps their timing/duration could also be fractally derived ... I don't suppose someone knows of such a thing already being done? -- David gnome(a)hawaii.rr.com authenticity, honesty, community

15 years, 1 month

Re: [LAU] LAU] 5.1 to ambisonices (was: more than 4 channels for listening? Really?)

by Martin Leese

[Arnold Krille <arnold(a)arnoldarts.de> wrote: ... > So my idea is to split the rear channels into six or more channels distributed > around the rear side of the circle (or even sphere) to have a more surrounding > feeling and overcome the hole in the panning. The alternative to having multiple virtual speakers fed with the same signal is to spread a single channel out. You split the channel into a range of frequencies, and then place each frequency at a different position. This was a technique used on the old analogue Ambisonics studio kit. The same idea is used in the PS22 Stereo Maker plug-in from Waves Audio although, in this case, it is being used to spread a single channel into stereo. The screenshot on Page 21 of their manual should give you the idea, visit: http://www.waves.com/Manuals/Plugins/PS22.pdf It should also be straightforward to extend the technique to 3-D using an elliptical spiral. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/

15 years, 1 month

ardour muted

by Andras Simon

Sometimes ardour, while otherwise working perfectly, goes completely mute. Reconnecting to jack or restarting doesn't help. What should I check or change? (I'm using version 2.8.4 on Fedora 10 with no PulseAudio.) Andras

15 years, 1 month

Jack included in Main for Ubuntu Lucid Lynx

by Fritz Meissner

I'm not sure if this is old news to others, but I just noticed that jack has been approved for inclusion in main for Ubuntu Lucid Lynx; this means that now PortAudio can be built with support for jack and we hopefully will be able to have a distro that "just works" for serious sound (although there is still some discussion about kernels). Details are here : https://bugs.launchpad.net/ubuntu/+source/jack-audio-connection-kit/+bug/51… Congratulations to the Ubuntu Studio team - it's nice to see that the work and pressure to improve Ubuntu audio is paying off. Fritz

15 years, 1 month

OT: linux video?

by Aaron L.

Hi all. It's been interesting to read about everyone's various setups and I noticed a few people mention that they're using ArtistX. Is anyone actually using it for video editing? And I don't even mean "pro" video editing. I'm just wondering about video editing period. I've been using UbuntuStudio for the past couple of years and the video editing software that came with it leaves much to be desired. Just curious if anyone's actually producuctive with anything video and linux related. Thanks. -Aaron

15 years, 1 month

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Linux-audio-user March 2010