Linux-audio-user February 2005

linux-audio-user@lists.linuxaudio.org

173 participants
197 discussions

[linux-audio-user] alsa clients plugged into jackd with jackplug

by Esben Stien

I don't think I understand this jackplug concept. I'm trying to get an alsa client, such as aplay to play through jackd. I've setup jackplug in /etc/asound.conf pcm.jackplug { type plug slave { pcm "jack" } } pcm.jack { type jack playback_ports { 0 alsa_pcm:playback_1 1 alsa_pcm:playback_2 } capture_ports { 0 alsa_pcm:capture_1 1 alsa_pcm:capture_2 } } I then tell aplay to use: #aplay -d jackplug foobar.wav But aplay plays the file even if jackd is not started; why?. Isn't jackplug supposed to show up in my jack connections when aplay is playing? I seem to be missing something vital. Is there some way to make a "fake audio device", like hw:3,0 that alsa applications can connect to so that I can get the audio out and then send it through jack, process it and then send it to the real audio device? -- Esben Stien is b0ef(a)esben-stien.name http://www.esben-stien.name irc://irc.esben-stien.name/%23contact [sip|iax]:b0ef@esben-stien.name

19 years, 3 months

[linux-audio-user] Re: Boa-Conductor (was re: Raton)

by David Baron

On Wednesday 19 January 2005 19:02, linux-audio-user-request(a)music.columbia.edu wrote: > > So how would Raton-Conductor work? Again, not as simple as it sounds. > > Minimally, one would move the mouse in a ecliptic (or circular) motion > > (as suggested by MagicBaton's instructions for beginners). The size of > > the vertical diameter (or average diameter) would be the > > volume/expression and tempo or time-codes set by the change in vertical > > direction from down to up. Real conducting patterns are more complex but > > these two principals would more or less remain. > > I started tinkering after I read your message, and I created a little > gadget that traces mouse motions and recognizes fairly general conducting > patterns. One can extract timing and intensity information for the purpose > of generating MIDI clock events as well as MIDI controller values. I'm > tentatively calling it Boa Conductor. Cool! > > I've got a few questions: > 1. Is anyone interested in a tool like Boa Conductor? What I've done so > far was just for kicks; I now have to decide how much time and effort > to put into polishing it. I, of course, would be interested. > 2. Are there any MIDI sequencers/players for Linux that can be driven > by external clock messages? My understanding is that Rosegarden does > not currently work as a slave but that may change in the future. > MusE can work as a slave, but I never used it before (has anyone > tried driving MusE with clock messages?). I don't think timidity > expects to be driven by a MIDI clock. How about other MIDI players? > 3. Would it make sense to have a feature that uses JACK Transport > rather than MIDI clock? There are a few alternatives. Not much that I have on Windows or Linux support clock messages. MagicBaton was a MIDI-player that added events based on the mouse-conducting. Alternatives: 1. Run the Boa in Parallel with whatever sequencer or player is going through jack or such. Boa would then put out simply omni/overall level and tempo events. 2. Run Boa as a plug-in Rosegarten, Muse or other such program. In this case, it would work on one track/channel and insert expression (and tempos) or in an omni mode as above. For rehearsing (MagitBaton's parlance) one track, one would probably want to disable tempo changes and conduct expression. Omin/overall would do level and tempo. 3. Controlling another software via midi-clock and some volume control device. This assume, naturally, that this software is available :-)

19 years, 6 months

[linux-audio-user] Behringer BCA 2000 - has anyone tried it ?

by Jan Holst Jensen

Hi. I see that Behringer has released a new gadget: http://www.behringer.com/BCA2000/index.cfm?lang=ENG Has anyone tried this thing ? Does it work with the generic USB audio driver or do we have to wait for ALSA drivers to become available ? I am _almost_ off to buy one :-). Cheers -- Jan Holst Jensen, Denmark __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail

19 years, 6 months

[linux-audio-user] HDSP & amixer: What's Changed?

by Janina Sajka

Something about amixer's control of the HDSP Multiface has changed. And, I can't seem to hack how to fix things. Please help! I used to use the simple bash script (as published in Linux Journal) #!/bin/bash for i in $(seq 1 18);do amixer cset name=Chn,index=$i 32768 done to set all the channels to unity, but this script no longer works. I get: amixer: Control default cinfo error: No such file or directory Meanwhile, my hdsp is definitely clipping and I can't quite tell where to tweak it. alsamixer is also no longer available, gives an error: No mixer elems found This is with Fedora 3, so alsa 1.0.6 and the alsa-firmware tools (hdsploader, hdspconfig, hdspmixer). PS: hdspmixer is not accessible to me because I need an eyes-free interface. I suppose knowing where/how to tweak the hdspmixer default presets might do it?? Thanks for any help. Janina

19 years, 8 months

[linux-audio-user] Tweaking alsamixer for the Echo Indigo IO

by Jon B

I just got an Echo Indigo IO card. It works (and I like it a lot so far), but alsamixer's sliders are all mixed up. Left channel over here, corresponding right channel way over there on the other page, etc. After I figure out what each one does, can I submit a bug report somewhere and have them rearranged and labeled better?

19 years, 9 months

[linux-audio-user] question for Delta 1010 users

by Florin Andrei

I bought a Delta 1010, which works very well. But there's one strange thing: I let the system running the whole day and, when i came back home this evening, the power LED on the 1010 was turned off and the card was not passing any signal in or out. The OS was seeing it, i was able to run envy24control, but couldn't hear anything. Rebooting the system didn't help. After power-cycling the system, the card works fine again. Cause? Remedy? Also, is your card running hot like mine does? (epecially the left-hand side of the box) -- Florin Andrei http://florin.myip.org/

19 years, 9 months

[linux-audio-user] more music with Ardour

by Dave Phillips

Greetings: I've added another recording to my "music made with Ardour" page, a guitar duet this time. It's a performance of an old Jimmy Dorsey tune called Maria Elena, you can check it out here: http://linux-sound.org/ardour-songs.html Best, dp

19 years, 9 months

[linux-audio-user] USX2Y rawusb mode

by Spencer Russell

So my US428 was working pretty well on my rackmount computer, but with that motherboard fried, I'm now back to using my laptop. For some reason my US428 doesn't like my laptop very much. One thing that seemed to be a problem was that here was some sort of qjackctl conflict with the non-multithreaded QT libs, so I installed the multithreaded ones, recompiled, and at least my computer is no longer crashing whenever I start start jackd from qjackctl with my us428. However, I'm getting more xruns than I think I should, and it might be beacuse I think I'm not using the rawusb mode. Seems that I need to use -dhw0,2 to use rawusb mode, but when I try that, I get ALSA/USX2Y: Cannot open hwdep device "hw:0,1" It should be located at hw:0,0, I think, but I'm not sure how to specify that. Any ideas? thanks, spencer

19 years, 9 months

[linux-audio-user] Enabling joystick under alsa

by Barton Bosch

I'm trying to configure a joystick so I can use it as an Mplayer transport control. The first complication is that the actual machine that I need to use it on has no gameport for its onboard soundcard. Under the assumption that I can add an adapter card with a gameport (an inexpensive pci soundcard or gameport adapter card) I proceeded to test a previously untested second hand joystick for functionality and linux compatibility on a secondary machine that does have a gameport. The primary box (no gameport) runs FC2, a 2.6 kernel with ALSA. The secondary box runs RH 9 with alsa added on through Planet CCRMA, the soundcard is a yamaha (ymf701 I think) which uses the snd-ymfpci module. The joystick is a Gravis Blackhawk. Having failed to get the input device detected (jstest /dev/js0) under linux I resorted to windoze and managed to test and calibrate it as a Gravis Analog Pro device, so I am fairly sure that it's the analog flavor of Blackhawk. In reading some ALSA docs I found that the gameport needs to be enabled at the alsa soundcard module's compile time but I have no idea how to check whether it is enabled in the module. Beyond that I'm not sure which modules need to be loaded. My impression is that joydev and maybe analog are the relevant modules but I'd appreciate any tips or further info. Thanks, Barton

19 years, 9 months

[linux-audio-user] newbie qjackctl howto

by vector

Hi all Q is there a howto or tutorial on qjackctl? or on Jack in newbie terms i googled but cannot find ;( Background just installed demudi worked outa the box. i have sound, cd, line input etc but cant get ardour to "see" the line input signal any thoughts? ta

19 years, 9 months

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Linux-audio-user February 2005