Linux-audio-user May 2009

linux-audio-user@lists.linuxaudio.org

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Fons could you make us an Hammond ;)

by Grammostola Rosea

Wow that Aeolus pipe organ sounds great... so I thought... ugh Hammond ugh ;) \r

15 years, 5 months

what's up with midi clock

by Atte André Jensen

Hi Long story short: I'm writing a osc2midi_clock script in chuck for controlling sooperlooper from incomming osc messages. I have no experience with midi clock so I had to play around with it. The following seems to work (T for time messges (0xf8), S for start (0xfa), x23 means "repeat 23 times"): S Tx23 S Tx23 S etc. It even works to the point that I can throw in clients at any time, since the start messages resets the clock every quarter note. The two clients I checked with are sooperlooper and renoise. *However* the specifications I looked at are: http://www.harmony-central.com/MIDI/Doc/table4.html http://www.blitter.com/~russtopia/MIDI/~jglatt/tech/midispec/seq.htm They both suggests that it should actually be S Tx24 S Tx24 S etc, with little or no time between S and the following T. However here the clients (again sooperlooper and renoise) doesn't show the test tempo 112 but somewhere between 116 and 117. Anyone has any idea what the right way? Also; I've been discussing this with Jesse Chappell (author of sooperlooper) and he says that he looked at his code and thinks there's a bug (which makes it work correctly with my wrong midi clock, since that's actually written targetting sooperlooper). Now it would be very interresting to look at other clients and masters of midi clock, however not having worked with midi clock before, what would be the first clients to cross check with? -- Atte http://atte.dk http://modlys.dk http://virb.com/atte

15 years, 5 months

Re: [LAU] ubuntu realtime.

by Thomas Kerstgens

Hi Tom, I just went fine with the instructions on the jack-faq-page (http://jackaudio.org/faq). Did you add these lines to your /etc/security/limits.conf ?: ------------------ @audio - rtprio 99 @audio - memlock unlimited @audio - nice -19 ------------------ Do not forget to add yourself to the group 'audio' and re-login. This in combination with the rt-kernel works great for me. Regards, Thomas > could someone point me in the direction to a guide on setting up rt- > kernel on ubuntu jaunty. i'm having trouble getting qjackctl started > in realtime mode despite the fact that i am running 2.6.28-3-rt #12- > Ubuntu SMP PREEMPT RT. i've done this in other distros but i must be > missing something here. > > thanks. > > t ____________________________________________________________ Text: GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://produkte.web.de/go/04/

15 years, 5 months

Hard lock-ups -- Trying to narrow the cause

by Darren Landrum

For the past 6-8 months, I've been having issues with hard lock-ups on my computer. Strangely enough, they occur the most, and are predictable, when I'm playing back longer Flash videos in a browser (watching Leo Laporte's live TV stream is a guaranteed show-stopper). It all started when I got my new Echo MiaMIDI card. At first I thought it was a bad card, but it ran just fine in another machine for about a week or so, no issues. Now I'm trying to determine if there is some kind of driver issue or maybe a driver conflict. First off, I'd like to mention that every time I install a new Linux distro, it's a major chore getting this card working, as it involves compiling ALSA from source. I'm running the latest Ubuntu Studio at the moment, and even though they included a driver for the Mia, it didn't seem to load right, even though modprobe didn't complain, and restarting the computer caused yet another lock-up. At the moment, I went ahead and compiled the driver from 1.0.18a sources myself, along with the firmware, installed that, and even though I've run into a few hiccups (a lock-up during boot being one), the card is functioning at the moment. I'm also skipping the proprietary NVidia driver for a period of time, just to see if that (or a conflict with it) might be the cause. I seem to remember a number of people having some interesting issues using higher-end cards with PulseAudio. I'm beginning to wonder now if Pulse might be my primary culprit. If that be the case, since I don't really want it around anyway, does anyone have a pointer to any instructions on how it might be removed from Ubuntu Studio 9.04? If I do end up removing Pulse, that does leave me with a bit of an issue, as the Echo drivers don't do any sound mixing from different applications asking for the driver. So, I'll need a sound daemon of some sort in order for the computer to continue to be usable. Thank you very much for any help. Regards, Darren Landrum

15 years, 5 months

Goed nieuws! Especially for the Dutch speaking: special linux audio forum part on homerecording.be !

by rosea grammostola

(Nederlandstalig linux forum gedeelte op homerecording.be >>> http://www.homerecording.be/forum/f43/ !) Hi, Thanks to the LAU mailinglist, I've discovered the possibilities of Linux for producing music in the last two years. But it seems I'm a bit of a special case in The Netherlands... most people seems to use Mac or Windows for music production, even people who prefer Linux as their main OS... To change it a bit, I helped people on Linux forums and wrote a dutch tutorial for Qjackctl and Ardour. I also posted my enthusiasm and knowledge on 'not-linux' forums... got a lot negative reactions, but not on www.homerecording.be. The had a open mind for opensource software... and after posting some posts there, they have decided to open a special subforum for making music on Linux! :) (Windows and Mac can't say that...) It would be cool if dutch speaking people will support this forum part by taking a look at it reguarly and to post some messages, moreover to help people with making music on GNU/Linux! You can find the forum here: http://www.homerecording.be/forum/f43/ CU there! \r

15 years, 5 months

alsa midi to jack midi

by andy baxter

hello, I've been looking at ingen ( http://drobilla.net/software/ingen/ ). Had some problems getting it to build, but the trick turns out to be to install liblo and libsoup bfore you configure the build. It's a really nice bit of software - a GUI modular synth that lets you design and save simple patches which can then be used as building blocks for more complex ones. The main problem I'm having with it so far is that it doesn't seem to understand alsa midi - only jack midi. This is difficult as I don't have or know of any midi programs (particularly a virtual keyboard) which produce jack midi signals. Does anyone know of an easy way to convert alsa midi into jack midi and vice versa? andy

15 years, 5 months

Building a DAW

by Ricus Vincente

I'm trying to talk the guys I work with, into building an inexpensive DAW for the analog studio that I currently work in. Right now we're old school analog EVERYWHERE. The only digital gear in the room are a few PCM 90's, and my Masterlink that I bring when I mix. We have a 2" 16-track machine, which sounds AWESOME, but at $250 per reel, a lot of our clients can't afford tape anymore. We really only need 16 in and 16 out. So my thoughts are to build a fairly powerful PC to run one of the multimedia flavored linux distros, putting four Delta 44 cards in it, and running Ardour. I am a free software user, but I haven't used it much for audio production, and I'm not a super linux hacker or anything. Would configuring a system like that be particularly difficult? Once the DAW is up and running, we would only need to buy two 16 channel snakes to break in and out of our patch bay. Best, Rich...

15 years, 5 months

More Hammondology

by Ken Restivo

Pursuant to the recent discussion of Hammond emulations on Linux: I just got back from the Boom Boom Room in San Francisco, where I spent the night playing their house Hammond B3. That is just one magical instrument. And, after playing the real thing for several hours with a full band and for a packed dancefloor, it's clear that nothing I've ever heard in emulation comes close to it. There's something about the way it moves air around that I really doubt could be duplicated. The bass player enjoyed standing in front of the Leslie, and said, "When you get those swells going I get a nice back massage!". Still, I'm going to try out Connie and am very intrigued by the idea of running Beatrix on a dedicated netbook. And also need to get AZR3 running on my netbook too. And motivated to finish writing the code for my Arduino-based swell pedal. I think the Hammond might could be the original mad scientist instrument. Long before Robert Moog started building synths, the Hammond had lots of knobs and buttons and sliders for nerds to play around with. -ken

15 years, 5 months

Calf Monosynth == cool

by Ken Restivo

I forgot to mention that I also played the Calf Monosynth DSSI synth live last night too. Nice synth sounds, runs well on my EEE netbook (where my favorite AMS patches are a bit too heavyweight). Avec photo: http://www.restivo.org/blog/archives/on-the-hammond-again -ken

15 years, 5 months

Silent jackd -dnet

by Fog_Watch

Dear Jackers I am wishing to send sound across a network in the way described in the walkthrough: http://trac.jackaudio.org/wiki/WalkThrough/User/NetJack. To date I haven't heard anything though. On the master machine I "# jackd -dalsa -P" without error. Then, On the slave machine I "$ jackd -dnet" without error. Then, On the master machine I "# jack_netsource -h hostname" without error. I then "$ mplayer -ao jack soundfile" on slave without error or sound. -v does not enlighten the situation. Curiously, qjackctl on slave lists the transport state as stopped. That doesn't sound too good to me, but I don't know what it means. Any clues would be greatly appreciated. Regards Fog_Watch. $ uname -r 2.6.26-gentoo-r3 $ jackd --version jackd version 0.116.2 tmpdir /dev/shm protocol 24 # aplay /usr/share/sounds/alsa/Noise.wav produces noise on the master machine, as expected. -- Lose wait. Get Gentoo.

15 years, 5 months

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Linux-audio-user May 2009