Linux-audio-user January 2009

linux-audio-user@lists.linuxaudio.org

165 participants
173 discussions

by Nedko Arnaudov

In this release: * lv2rack does no longer require PHAT (it was not really using it even in zynjacku-3 release) * Support for out of process plugin UIs (the upcomming nekobee release should use it) * Don't crash when trying to load non-existing plugin (specified by supplying plugin URI at commandline) * Don't crash with some plugins (NULL extension_data) zynjacku is JACK based, GTK (2.x) host for LV2 synths. It has one JACK MIDI input port (routed to all hosted synths) and one (two for stereo synths) JACK audio output port per plugin. Such design provides multi-timbral sound by running several synth plugins. zynjacku is a nunchaku weapon for JACK audio synthesis. You have solid parts for synthesis itself and you have flexible part that allows synthesis to suit your needs. lv2rack is a host for LV2 effect plugins. You need slv2 library to compile zynjacku tarball. Project homepage with screenshots: http://home.gna.org/zynjacku/ Get tarball from here: https://gna.org/files/?group=zynjacku -- Nedko Arnaudov <GnuPG KeyID: DE1716B0>

16 years, 10 months

Plasma TV as monitor for studio work.

by alex stone

Maybe an odd question, but in about 4 weeks i'll have the chance to try out a plasma tv as a monitor. And i'm now firmly entrenched in my single monitor/multiple desktop daily usage, so i'm keen to use 1 big monitor and switch. (Because i can. :) ) Have any of you in our linux audio world such a setup? If you use a plasma tv, what sort of graphics card are you using, and how big a screen can i consider, for good resolution on a day in day out basis? Alex.

16 years, 10 months

Still more music...

by Julien Claassen

Hello folks! I've just uploaded a new tune. A bit 60s. It's called "Mr. Marple". Accept the organ everything is LinuxSampler and fluidsynth. http://juliencoder.de/mr_marple.ogg Opinions anyone? :-) - No really, it's as always welcome! 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

16 years, 10 months

mixing multiple samples into a single audio file based on start times

by Erik Nomitch

Hi, I'm making a random "beat" generator based on a directory tree of samples and a map file. Currently, it shuffles sample order and creates a list of samples and their corresponding start time (example list below). I need a good way to mix all of these seperate samples into one single audio file based on the time at which each starts at. Any recommendations or thoughts would be appreciated. File format doesn't matter, I'll use whatever is easiest. Thanks, Erik Nomitch ex: at: 0.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2A.wav at: 2.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2S.wav at: 4.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1A.wav at: 6.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1S.wav at: 8.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_aOrig.wav at: 10.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01.wav at: 12.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_ST.wav at: 14.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_VT1.wav at: 4.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2A.wav at: 6.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2S.wav at: 8.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1A.wav at: 10.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1S.wav at: 12.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_aOrig.wav at: 14.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01.wav at: 16.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_ST.wav at: 18.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_VT1.wav at: 4.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2A.wav at: 8.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_C2S.wav at: 12.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1A.wav at: 16.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_T1S.wav at: 20.0 play /home/tux/.projects/elign/808/clap/808Clap-Kult_aOrig.wav at: 24.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01.wav at: 28.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_ST.wav at: 32.0 play /home/tux/.projects/elign/808/clap/808Clap-R8_01_VT1.wav etc...

16 years, 10 months

ATTN: Sponsors for Linux Audio Awards

by Patrick Shirkey

Don't miss your chance to get your company logo on the half page ad that Linux Journal is sponsoring for us in the April edition. Yes, that means free advertising for your company, blog, forum, or pet project in the Linux Journal and at the same time you will be supporting Linux Audio!!! All you need to do is reply to this email to let me know you want to officially support an award category. The deadline is Tuesday Feb 3 so don't delay. Visit http://awards.linuxaudio.org for a full list of the categories you can associate with and the sponsors who are already supporting the Awards. There are three levels of sponsorship* which range from simple name association (free of charge) to fully fledged corporate sponsorship. By participating as an official sponsor you show to the world the value your company, blog, forum, or pet project places on the continuing support and development of Linux Audio. *For more details and sponsorship packages please contact me directly. -- Patrick Shirkey Boost Hardware Ltd.

16 years, 10 months

[NEWS] A library for controlling apps using the native mode of the padKontrol

by Guillaume Meurisse

libKontrol-0.0.1 is out This is a preliminary release. If you have a padKontroll, feel free to test it. There is a small example provided. you can find the library and a few more info here http://guitoo33.free.fr Guillaume

16 years, 10 months

Re: [LAU] Any opinions on this ...

by Kjetil S. Matheussen

pete shorthose: >>> Contrary to the fans included with PSUs, the fans you can >>> buy separately can be silent, especially when downvolted >>> to 5V. So to ensure you don't >>> overheat a fanless PSU, which can happen if it's too hot, >>> it could be a good idea to mount a fan close to the PSU. >> >> That was a bit unclear. If I've understood correctly, >> fanless PSU's turns off if they run too hot, that's >> why you might want to add a little bit of air flow >> through it, especially if you run a hot CPU, etc. and >> have no case fan. > > This may be good advice, particularly if you live somewhere much > hotter than the UK. However, you needn't assume the cooling efficiency > is inadequate. Just crank the central heating up to something > a little higher than the hottest temperatures you experience locally then run > it under as heavy a load as you can for as long as you need to in order to > satisfy yourself that it's safe to use sans fan. Regularly cleaning the unit > should help too. The Silverstone PSUs all seem to have a single temp > status LED and I'd imagine you'd see quite quickly if it couldn't cope > with the conditions. You could abort as soon as the warning LED lit. > > I recognise that a device need not be truly silent in order to be effectively so, > and perhaps taking such a risk is unnecessary, but I've bought a fair few > "silent" or "quiet" fans in my time that were nothing of the sort. I've also had > lots of problems with fans that seem to have (or develop) defects that cause > noise so I'd rather just be shot of the whole spinny roundy horror show. > Granted, when you put your ear into the case from the outside, you will probably hear some air-swushing generated by that fan, so it's not completely silent. However, unless you mount your HD in rubber bands and further put it in a super-silent highly isolated box to avoid the remaining high-frequency blipps, a good 120mm fan running at 5V would be extremely unlikely to be more annoying than the HD. (if you use a HD of course)

16 years, 10 months

Audio recording from Rosegarden+QSynth+Hydrogen

by Andras Simon

I have tracks in RG whose sound is produced by qsynth, and others that are played by hydrogen. Is there a way to record what I hear in RG? I can record separately the qsynth tracks by choosing Jack:qsynth, and the hydrogen tracks by choosing Jack:Hydrogen-1 as the recording device in audacity, but then I have to (re)synchronize them. Other choices for recording device are Jack:rosegarden and Jack:system, but they apparently don't hear either of the tracks. Life would (I think) be simpler if audacity appeared as a writable client in qjackctl. (Should it, by the way?) Andras

16 years, 10 months

[ANNOUNCE] Invada LADSPA plugins

by Fraser

Hi Everyone, I've released some LADSPA plugins that are loosely based on my VST plugins I wrote years ago. I haven't produced any documentation yet but most plugins are fairly self explanatory. Utility Plugins * Input Module (Stereo only) Alter gain, balance, width, phase on a stereo signal Filter Plugins * Low Pass (Mono and Stereo version) * High Pass (Mono and Stereo version) Gentle high pass and low pass filters Simulation Plugins * Tube - (Mono and Stereo version) Valve warmth/distortion simulation Dynamics Plugins * Compressor - (Mono and Stereo version) Peak/RMS soft-clipping compressor The 'tight/sloppy' control modifies the envelope sensor - from peak (one sample) to rms (50ms worth of samples). Having the envelope 'sloppy' causes the compressor not to see transients at all, which allows for more severe compression on sounds like vocals & bass. Reverb Plugins * ER Reverb - (Mono and Stereo summing In) Early reflection based reverb. Really more of a room simulator than a reverb. Use this to add simulated room ambiance to sounds that have none - particularly useful when combining mic'd & electronic instruments as you can add room ambiance absent in the electronic signals to help blend in. Don't expect to get big washing reverbs with large room sizes - Large room sizes cause the early reflections to be individually discernible and you end up with a series of echos. Another use of this plugin is to reinforce stereo placement - the sound source is positionable and the resultant reflections realistically place the source at a specific spot. (rather than dragging the sound back to the center). I find slightly off square rooms sound best. The decision to release as LADSPA rather than LV2 is more due to the host support of LV2 than anything else. Once LV2 comes out of the RC phase of it's life and adoption by host applications becomes widespread I'll look at releasing these as LV2 plugins. You can grab the plugins from here: http://www.invadarecords.com/Downloads.php?ID=00000263 Any feedback, suggestions, hints and criticism welcome. regards, Fraser (fraser(a)arkhostings.com)

16 years, 10 months

OT: Phantom power and my acoustic guitar

by Andrea Del Signore

Hi all, sorry for the off-topic post, but since I'm a linux audio user from a long time this is the only audio group that I know ;) My question is: can I connect an Ibanez AW40ECE-NT guitar to a mixer with phantom power switched on? The guitar has a fishman pickup and an Ibanez SST preamp and I'll connect with the mixer using the XLR output, so the connection will be XLR to XLR. Best regards, Andrea P.S. I'm asking it here because searching through the various guitar and homerecording forums I found contradictory responses: someone says that I can damage my guitar pre or mixer and some other that it safe to connect with an XLR cable on both sides ("phantom" power). My mixer manual says only that I can't connect "unbalanced" equipment while phantom power is switched on.

16 years, 10 months

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Linux-audio-user January 2009