Linux-audio-user December 2002

linux-audio-user@lists.linuxaudio.org

109 participants
111 discussions

[linux-audio-user] ams, jackd & X as root? on debian

by Eric Dantan Rzewnicki

hello, I have jack installed and working now. So, now I'm trying to get AlsaModularSynth compiled and running. Has anyone else accomplished this in debian stable (woody)? I installed libqt3-mt (along w/everything it depended upon), fftw-dev, fftw2, sfftw-dev, sfftw2 and ladspa-sdk to get ladspa.h. I've tried to edit the top of make_ams to agree with the location of the qt3 libs, bin and include directories on my system as best as I could figure ... but I'm not sure I got it right: QT_LIB_DIR=/usr/lib/qt3/plugins/styles QT_BIN_DIR=/usr/share/qt/bin QT_INCLUDE_DIR=/usr/include/qt it seems to compile OK when I do: make -f make_ams though there are a lot of warnings about comparing signed to unsigned and other warnings that flew by. Are these benign? Anyway. I end up with an executable ams. When I run ./ams I get this: ./ams: error while loading shared libraries: libjack.so.0: cannot open shared object file: No such file or directory I have that in /usr/local/lib/libjack.so.0 so creating this link appears to help: box1:/usr/lib# ln -s /usr/local/lib/libjack.so.0 libjack.so.0 Is that the correct sollution? but, now: box1:/home/eric/audio_code/ams-1.5.5# ./ams ams: cannot connect to X server I assume this is because X is running as me (eric) and not as root. I'll try getting out of X and starting it as root as soon as I finish writing this message. But, is there a way to let root connect to the X server that's running as eric? I was sort of ok (well, not really, but I'm giving it a try) with the idea of running jackd and its clients as root ... but, running X as root, too? that makes me more nervous, somehow... maybe I shouldn't be nervous about that ... I'm not sure. anyway. i'll give it a shot with a root X session. I'm thinking that maybe I should patch and recompile the kernel and recompile jack to enable capabilities so I don't have to run as root. Do those of you running jackd as root also run your X session as root? Thanks for listening, Eric Rz. PS If all of this has been covered before and my questions are annoying you, feel free to send me to the archives. I try to follow jackit-devel, but most of it seemed to go over my head before I actually started to try it. So, re-reading the past couple months would probably do me some good now that I have the real thing in front of me. -edrz

20 years, 11 months

[linux-audio-user] The Open Loop Library, a few questions

by Darren Landrum

After some considerable thought as to the best way to organize such a library, as well as what a project such as this will do to my free time, I have a few ideas and questions to present to the list. I'll start with the easy one first. 1) What exactly would this library hold? There's no need for this to be restricted to loops. It could also contain other "musical raw material", such as sample sets and softsynth patches. In that case, calling it the Open Loop Library makes little sense. What else do you think would work? Open Music Library? Sounds like it's a repository for music, not for raw components. The upshot to the Open Loop Library name is that the domain openloops.org is available. It also makes a good working name for now. Really, that was the main question, and it brings part of the proposal with it. I would like to design and build a web service to act as a library for loops, sample sets, and patches. Here are some thought on the overall design. 1) The top level hierarchy would be (obviously enough) "Samples", "Loops", and "Patches". 2) Below "Samples", the categorization would go something like "Keyboards", "Brass", "Woodwinds", "Synth Leads", "Pads", "Strings"... Well, you get the idea. 3) Below "Patches", would basically be the same kind of broad categories as with samples. Now, "Loops" is where things get fun. I've been thinking about Mr. Knecht's comments on building an elegant organization system, which is something that Acid itself apparently lacks. I think an extensive metadata system is the best way to accomplish this. Every loop would have attached to it: a) Time signature b) Tempo c) Key (If applicable. Drum loops, for example, would not need this.) d) Creator's name e) Instrument(s) (This one is tricky, since there are so many instruments in the world. It would need to be a free-text field, which means misspellings could be a problem. Possible solutions?) f) Loop or one-shot (Not everything meant for a loop-based composition program need be an actual loop. Drum fills and cymbal hits come immediately to mind.) g) Style (This one creates some issues, due to how subjective it can be.) h) Comments (A free text field the creator of the loop can use to attach whatever additional info they feel it needs.) i) A million other things I can't think of at the moment. :) One problem that needs to be solved is how to attach these kinds of metadata to a loop. Also, another thing to consider are loop sets. Thinking about the architecture for the web app itself led me to think about how CPAN works, at least from a user perspective. I would set up a central index server, which could then redirect clients to the appropriate mirror to grab a file when a request is made. This also brings up the idea of a client that could be built that would talk to the servers from the user's machine. This client could be used to maintain the organization of all the loops the user chooses to download. This can be thought about after the main system is up and running, though. As for hosting, I have a good lead on a local colo facility. I have some other projects I need to host anyway. I apologize for the long email. Hopefully, this will start the ball rolling, and if all goes well, it won't crush me when I try to catch it. Regards, Darren Landrum who is hoping this hair-brained scheme doesn't spawn another mailing list. ;)

22 years

[linux-audio-user] SB Audigy - recommendable?

by Burkhard Woelfel

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, I am considering to buy a soundcard for around 100$ and there is an offer for a SB Audigy. Any recommendations? I read that the driver on Sourceforge is still experimental. Did anyone experience problems using that driver? What should I know or consider? Thanks a lot, - - Burkhard - -- no html mail please, thank you. pub key at blackhole.pca.dfn.de 899B AFD7 14E9 D595 EA00 BE8B A348 851C 0F62 E91D -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE93hdXo0iFHA9i6R0RAu6CAJ9iSrxXS0bPqCDNK93kuCvjPoL5QACdEC1U CQymH3oCgVVjpg0DRyQxP1s= =Kyxe -----END PGP SIGNATURE-----

22 years

[linux-audio-user] m-audio radium USB midi keyboard

by Eric Dantan Rzewnicki

http://www.m-audio.com/products/m-audio/radium.php Has anyone tried using this keyboard with linux, yet? I was about to buy an Oxygen 8, because I've read about several people in the LAD, LAU, ALSA community using them with linux successfully. But, then I saw this new Radium controller. It has 61 keys to the oxygen's 25, the same 8 knobs, pitch and mod wheels, and adds 8 sliders to the oxygen's 1. Would it be too far fetched to think that this would work as easily with a linux box as the Oxygen does? I would be very happy if it would. Thanks, Eric Rz.

22 years

[linux-audio-user] alsaplayer not working with alsa?

by Mark Knecht

Hi, When running alsaplayer version 0.99.73 without jack, I'm seeing this failure: [mark@Godzilla mark]$ alsaplayer -v alsaplayer 0.99.73 [mark@Godzilla mark]$ alsaplayer alsaplayer: pcm.c:6293: snd_pcm_unlink_ptr: Assertion `0' failed. AlsaPlayer interrupted by signal 6 [mark@Godzilla mark]$ alsaplayer works very well when jack is running. Anyone else seeing this? Thanks, Mark

22 years

[linux-audio-user] HDSP 9652 MIDI Timing

by Mark Knecht

Paul, I've done a bunch of work over the last few days with a problem I was experiencing using Rosegarden to play MIDI and then receive and record the audio from external sound sources in Ardour. First, yes, it really works, and actually works pretty nicely. Jack, Ardour and Rosegarden are all playing nicely together. However, I have found that: 1) There is a severe timing problem when using the HDSP MIDI interface under Linux. Over time the HDSP 9652 just gets further and further behind. 2) There is no problem with the HDSP MIDI interface under Windows. 3) Thee is no problem with the MidiMan 2x2 interface under Linux. The problem seems to be pretty clearly the way the Linux stack is using the HDSP 9652 MIDI interface. I'm guessing it's a driver problem, but I don't want to color the perception. I know it's a newer driver. How can we go about debugging this and getting it fixed? I can post mp3's of all these cases for people to hear if it is desirable. I have lots more technical data to relate once we decide how to go about solving the problem. Thanks in advance! The fact that I have all this software working as well as it is is a great accomplishment for me, and due to a lot of great programmers out there like you guys! Cheers, Mark

22 years

[linux-audio-user] 24bit 96khz cards that work well

by Brian Redfern

Well, I figured out that the culprit to my xrun problem wasn't my 533mghz processor, its my envy24 chipset based card, from the alsa wiki: "Many but not all users complain about sound glitches. This may be due to the cards being IRQ hungry. (VU meter interface?) -- Tobiah" Given that the evil envy24 chip is in a lot of cards out there, I'm wondering what cards people have had better results with? http://www.brianredfern.org

22 years

[linux-audio-user] What wave-editor to use for voice removal?

by Remco Poelstra

Hi, For a musical I've to remove the background choirs from a karaoke cd. The CD sounds like it's MIDI, and it's some simple music. I hope I can remove the choirs by overwriting them with other parts of the song that have the same instrumental parts. The problem is that I can't find a good editor to do so. I need some multitrack capabilty, to lay all the different parts on different tracks for easy editing. I need some form of volume-envelope/automation for smooth fading of the tracks (fade in/out plugins are not an option because I need to tweak it and that's difficult with plugins that work on selections). The obvious candidates like audacity and ardour don't work, because audacity has no markers, so I can't find back the positions from where I cut and ardour is too buggy to use. I've looked at linuxsound.at for editors, but most are still too much under development. I hope someone here can give me a good hint on what editor can be used. Perhaps I missed a feature in one editor that can help me? What editor would you choose? Thanks in advance, Remco Poelstra

22 years

[linux-audio-user] want a midiman portman 2x4 parallel port midi interface?

by Matthew Yee-King

Hello I'm clearing out all my old guff and i found a midiman portman 2x4 parallel port midi interface. Last time i looked ( a year and a half ago) there were no linux drivers, but if anyone wants it, i can send it to them. mail me off the list if you want it. you'll have to pay the postage. cheers + good new year matthew

22 years

[linux-audio-user] new computer woes

by Anthony

Thought I'd post to see if anyone has any advice. I've just built a new SMP machine: Asus A7M266-D, 1.0 Ghz Athlons * 2. I got some nice fans from endpcnoise.com (Molex) that are virtually silent and a Power Supply which is louder than what I'd hope but very reasonable for 400W's I suppose (dunno). I installed gentoo, latest alsa, etc... Unfortunately playback is distorted during video load. It is *not* a CPU load issue - I can playback just fine while compiling the kernel with make -j3. If I scroll pages up and down in galeon the sounds slows down :o. Jack doesn't report Xruns but sometimes delays when I do this. This occurs both with the onboard C-media chip and my Delta 44. I struggled for a long time to get the IRQ's not to share. I tried all the suggestions in the Audio Quality HOWTO. The video card is a PCI GForce 2. It was in my old machine and didn't cause any problems (while my old onboard AGP did create some noise). The only thing I can find is the PCI Latency settings are all set to 32. This seems odd I suppose, so I tried higher settings for the video to give it more bandwith and other variations with no success. I might go out and buy an inexpensive AGP card tomorrow, but I'd hate to find out the problem is deeper than that. Kernel is 2.4.20 vanilla tried with and without lowlat. Maybe I should back down to 2.4.19? Any suggestions? TIA --ant

22 years

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Linux-audio-user December 2002