Linux-audio-user March 2003

linux-audio-user@lists.linuxaudio.org

134 participants
134 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, 2 months

[linux-audio-user] Trying to record audio from line in and additional questions

by Sylvain Robitaille

First the vitals: The computer system is a 400 MHz K6-2 with 512 MB memory, and a Hercules Fortissimo II (Cirrus Logic Soundfusion CS4624 processor) sound card. The OS is Linux-2.4.20 (built up from Slackware-8.0, with kernel patches and package upgrades). I have the following ALSA components installed: alsa-driver-0.9.0rc7, alsa-oss-0.9.0rc1, alsa-utils-0.9.0rc7, alsa-lib-0.9.0rc7, alsa-tools-0.9.0rc7. The kernel is mostly monolithic, with the following options (abridged to include only those I know are relevant; if folks want the complete listing, I can easily provide it): CONFIG_EXPERIMENTAL=y CONFIG_MODULES=y CONFIG_MODVERSIONS=y CONFIG_KMOD=y CONFIG_LOLAT=y CONFIG_LOLAT_SYSCTL=y CONFIG_RTC=y CONFIG_SOUND=y ALSA is the only component that I have modularized (only because I don't have the impression it can easily be just built-in, actually), and the following modules are loaded: Module Size Used by snd-mixer-oss 11120 1 (autoclean) snd-cs46xx 58096 1 (autoclean) snd-pcm 50752 0 (autoclean) [snd-cs46xx] snd-timer 9392 0 (autoclean) [snd-pcm] snd-ac97-codec 26912 0 (autoclean) [snd-cs46xx] snd-rawmidi 11808 0 (autoclean) [snd-cs46xx] snd-seq-device 3824 0 (autoclean) [snd-rawmidi] snd 27280 0 (autoclean) [snd-mixer-oss snd-cs46xx snd-pcm snd-timer snd-ac97-codec snd-rawmidi snd-seq-device] I've been using Linux with OSS and a Media-Vision Pro-Audio-Studio-16 soundcard for years, and have basically had very little trouble with that combination. Upgrading to Linux-2.4.x caused the sound output to be rather noisy, so I recently took advantage of the situation to buy a new soundcard, and upgrade to using ALSA (which I've been wanting to do so I can investigate certain rather exciting applications such as Ardour and the new Rosegarden). The applications I've been using for years with OSS, (notably Dap, Mixviews, Aumix, and a few others) all appear to mostly be working fine, presumably through the ALSA OSS emulation. Aumixer now shows some lables (PhoneIn and Video) which don't correspond to any inputs I have on my soundcard, while some others (IGain and Line1) don't appear to have any use, given the way I'm currently using the card (signal from a hardware mixer going to the Line input, and signal from the main, front line output going back to the mixer). I can play back sound files without any problem. In fact I've also tried a few new (to me) applications, such as Audacity, ProTux, and (though I'm having problems with it I won't cover here) Ardour, and they too play back sounds quite nicely (the sound is "grainy", though, perhaps I need to investigate the Low-Latency issues more, or increase the size of some buffer somewhere). I can send sound to the computer, and listen to that sound coming back from the computer (adjusting the level with the "line" level in Aumix, for example), but if I try to record that sound (in any of the applications I've tried, including all those listed above), with "record enable" selected in Aumix, I get no audio recorded (silent sound file). Also, I find it interesting to note that I can record-enable only one input source at a time (contrary to my old Media-Vision card). I'm assuming that's a function of the hardware, though and can't be fixed in software? Finally, we get to my questions: - Can someone point me in the right direction(s) to find a solution to this, so I can record audio (preferably from numerous sources) into my computer? I'll be perfectly happy with pointers to documentation (though I expect to get at least some to documentation I've already read, because I think I've repeatedly gone through all the documentation I already found myself), and suggestions to upgrade certain components. - I've tried to start Jackd at system boot, with the following command added to my rc.local file: /local/bin/jackd -d alsa -d cs46xx -p 512 & Jackd fails to start at that point (I'm afraid I haven't noted the exact error message, but I can make a point of doing so next time I reboot the system), but it does start when run manually from a root shell. Does anyone have any idea why jackd might not start at boot time, (perhaps the ALSA modules aren't loaded yet at that time)? If I understand my boot sequence properly, kernel modules are setup (via "depmod -a") before rc.local is run, so the modules may not be loaded, but they should by that point be loadable (they load automatically by the kernel in regular use). - Is it possible to build ALSA into the kernel? - on a slightly unrelated point, my new soundcard has a built-in synthesizer with at least some features I'd like to explore. Though I know this won't replace any of my hardware synths (or some of the software synths I've begun to play with), I'd like to play around with some of its built-in sounds, and probably use it (at least until I get something better) as my "preset playback" device, controlled from an external MIDI controller. Does anyone have suggestions for how I might go about that? (again, simple pointers to existing documentation would be more than appreciated). In case people are wondering about my specific intended application, I'd like to use a Roland Octapad to trigger percussion sounds from the soundcard's built-in synth. Thanks in advance for any pointers people can provide.... -- ---------------------------------------------------------------------- Sylvain Robitaille syl(a)alcor.concordia.ca Major in Electroacoustic Studies Concordia University Faculty of Fine Arts / Music Department Montreal, Quebec, Canada ----------------------------------------------------------------------

20 years, 5 months

[linux-audio-user] Which Card?

by Emiliano Grilli

Hi, I've decided to switch from my cmipci-based DiO 2448 to a envy24-based soundcard. Now I have three choices of used gear: 1) Terratec EWS88MT - 400 euros 2) Terratec EWS24/96 - 130 euros 3) Midiman Delta 66 - 230 euros some considerations: * I've no special need for s/pdif * ardour would be the target app * 4 simultaneous I/O channels would be nice * I'm a little on budget Any hints? Thank you P.S. with EWS24/96 it's possible to record reliably 4 channels at once? -- .-----------------------. | Emiliano Grilli | | emillo(a)libero.it | | Linux user #209089 | | http://www.emillo.net | '-----------------------'

21 years

[linux-audio-user] Notebook for audio

by Ralf Haller

Hi Group, I am thinking of buying a notebok or subnotebook. However I don't know which one to get? Here are some requirements the notebook should meet: 1. Runnable with Linux (of course!) 2. Reasonable sound support (recording and playback at least) 3. jack and adour should be able to run 4. WLAN (either build in or via PC-Card) What notebooks do you use? What are your experiences? Any help or advice is appreciated. r(a)l.f

21 years

[linux-audio-user] Recording quicktime audio?

by James Hughes

Greetings, Can anyone give me an idea how to record the audio from a quicktime movie? I've had success recording mp3 streams using grecord or xsox, and thought I could do the same with qt, but no go. I'm using the crossover plugin to play the movie in the browser. Thanks, James -- James Hughes jhughes(a)kos.net http://jpathu.net/

21 years

[linux-audio-user] Mixing pro and consumer gear

by Ross Vandegrift

Hello all, I'm preemptivly asking a question that'll hopefully be put to good use this week. I found a nice deal on a Delta44 off Ebay the other night, and jumped on it. Can't wait until it shows up! However, I'd like to *add* it to my machine, and keep me SB Live for some stuff like everyday listening and perhaps some cheap output monitoring. I've had friends tell me this doesn't work in Windows because Windows will only record at the lowest-common-denominator capabilities of all cards in the system (ie, 16/44 in a system with an Delta44 and an SBLive). Is this an issue with either ALSA or OSS in Linux 2.4? Also, I know there are emu10k1 audio routing utilities, and I know there are envy24 audio routing utilities. Is there a way I can route audio between the two cards at all? -- Ross Vandegrift ross(a)willow.seitz.com A Pope has a Water Cannon. It is a Water Cannon. He fires Holy-Water from it. It is a Holy-Water Cannon. He Blesses it. It is a Holy Holy-Water Cannon. He Blesses the Hell out of it. It is a Wholly Holy Holy-Water Cannon. He has it pierced. It is a Holey Wholly Holy Holy-Water Cannon. He makes it official. It is a Canon Holey Wholly Holy Holy-Water Cannon. Batman and Robin arrive. He shoots them.

21 years

[linux-audio-user] iCubeX experiences?

by j.c.w.

greetings all! i am a bit of a controller freak and have just started looking into the iCubeX system (http://www.infusionsystems.com/index.shtml). i used to roll all of my own control devices, but i am a bit short on time as of late (full time jobs tend to do that). i'd like to give this thing a chance. i see that paul davis (you rock, dude) wrote a gnu/linux editor for the device that controls a limited subset of its features, but it looks like the software hasn't been touched for some time. i am interested in using it with pd primarily and possibly jmax. my question is this: does anyone out there have any experience to share with me re: using this gadget with gnu/linux /only/. i don't do windows at home, so i'd like to know what i can expect. anywho, enough of that...so, anyone know anything about this doo-dad? thanks! j.c.w.

21 years

[linux-audio-user] Help with mixer/preamp config (OT?)

by Bryan Koschmann - GKT

Hello, I'm am sure this is off topic but I am desparately seeking help. I am trying to figure out how the mixer/preamp/input card will coincide with each other. If I have a card with 4 inputs (either midiman digital or SB lives), I will be needing preamps. I looked at the M-Audio Audio Buddy, which seems like it simply has 2 XLR inputs and 2 1/4" outputs. That part is straightforward and I understand. However, I was looking at mixers and I got lost. I looked at a Eurorack (cant remember which model) for around $170. It had 4 XLR inputs, and the box said it had 4 mic preamp inputs. But, how do the outputs work? I was looking for 4 1/4" jacks marked "output 1" "output 2" and so forth. Where am I lost? Please forgive me for asking such newbie questions. I simply do not know where else to turn. I've searched the net high and low and didn't find the answers. Thank you very much in advance, Bryan

21 years

[linux-audio-user] visual to audio

by matthew yee-king

Hello there does anyone know of a tool that lets you convert visual images to sounds (or better still, video)? i guess pd+externals can do it?? cheers matthew

21 years

[linux-audio-user] Announcing Audio* Music Synthesis Project

by Nick

Hello, I am new to this list, so please be gentle, and help me learn to use it. I am announcing my project I have going on at SourceForge. http://audiostar.sourceforge.net http://www.sourceforge.net/project/audiostar The project is about creating real-time synthesis applications. It targets to run on Linux and Windows, but with an emphasis to getting the most out of Linux. Audio* is a toolkit library of synthesis classes in C++ for creating instruments and applications that make computer music. So far it has been mostly concentrated on the only application so far, Mojo, an Analog Modelling Synthesizer similar to Rebirth but more flexible than a 303 which tries to emulate classic synthesizer sounds of the 70's and 80's. So far everything is in one big mess, and I am using KDevelop Studio as I learn more about the Linux programming tools (I am coming from several years of Windows programming, but little Unix background). The project uses FLTK (because it's fast, light, and stupidly simple to use). One project is to create a unified set of FLTK widgets specifically for Audio programming (and probably port them to use GTK and other widget libraries). So far I am using Port Audio as the sound library, it works well. I don't have plans to create yet another low level sound driver unless it is something many people would find useful. The only application is the Mojo, and like I said, it's a Rebirth like program but much more flexible and different (and doesn't really sound like it either). It does have nice alias-free waveform generation though of classic Analog waveforms, and some half-decent filters I designed. I hope to find people interested in using it, or helping work on it, or make this project grow into something cool. At least, I'd like to get feedback. People on sourceforge don't send any feedback at all. It would be nice to have just a small community of people interested in it's development and using it and letting me know what is going on. Thanks

21 years

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Linux-audio-user March 2003