Linux-audio-user March 2008

linux-audio-user@lists.linuxaudio.org

156 participants
149 discussions

by Julien Claassen

Hello! Fons, I wonder hwo far the text-interface for aeolus has progressed. I just installed aeolus-0.8.0 and started it with the "-t" option. But I can't do very much with it, except start. This is a pity! Can anyone help me here? 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

17 years, 4 months

A kernel warning

by Arda Eden

After installing a Release Candidate kernel, while booting i'm receiving a message : Mar 20 09:12:14 localhost kernel: ***************************************************************************** Mar 20 09:12:14 localhost kernel: * * Mar 20 09:12:14 localhost kernel: * REMINDER, the following debugging option is turned on in your .config: * Mar 20 09:12:14 localhost kernel: * * Mar 20 09:12:14 localhost kernel: * CONFIG_FUNCTION_TRACE * Mar 20 09:12:14 localhost kernel: * * Mar 20 09:12:15 localhost kernel: * it may increase runtime overhead and latencies. * Mar 20 09:12:15 localhost kernel: * * Mar 20 09:12:15 localhost kernel: ***************************************************************************** Is there a way to disable this option ? -- Arda EDEN Cumhuriyet University Faculty of Fine Arts Department of Music Technology Sivas/TURKEY

17 years, 4 months

Using jacklab + rosegarden + soundcard midi input + mother board joystick midi output

by Hugh Lawrence

Thanks in advance for any help you can offer me. I am a novice linux user and would basically like to know how to do the following, and any applicable advice you can give me. I would like to use my jacklab box as a midi controller as follows: pc #1: midi-out => jacklab box: audiophile 2496 midi-in => jacklab box: motherboard joystick port => external keyboard synth The audiophile works fine, I now would like to get the joystick port working with midi. I have read that I need to use the snd-mpu401 driver and at http://www.ale.org/archive/ale/ale-2005-02/msg00641.html have seen how to configure it. My questions are as follows: 1) is the alsa recompilation necessary in jacklab? Is there another way to get alsa to recognize the interface as a midi device in jacklab or is this the way to go... 2) upon getting the joystick port to work as a midi port, should I expect rosegarden to play nicely and see the new interface? I understand it *probably* should... 3) can I expect the joystick port and soundcard to both work well at the same time or should I just get an external midi interface (eg, midisport). The jacklab box is a P4/1.6ghz/768 MB if it pleases you to know... Thanks for any help...I just don't want to play around with this stuff to find out it doesn't work well.

17 years, 4 months

New User

by Al Thompson

Hi all. I'm new here so I figured I'd introduce myself. I'm using fully upgraded Fedora Core 7 (Kernel 2.6.23.15-80) on a 2.4GHz Intel P4 in a Compaq which has a sound card integrated on the motherboard. lscpi reports it as being an 'Intel 82801DB/DBL/DBM AC'97 Audio Controller.' Which works fine. However, I dual boot XP, for which I sometimes have a USB I/O audio device (Alesis Multimix) connected. If I happen to forget to disconnect the mixer before I boot into Linux, the mixer is made the default audio device, and all reference to my internal sound card is removed. If I shut down, remove the USB mixer, and reboot, there is NO sound card available. If I run 'system-config-soundcard' I can get it to work again after clicking on 'autodetect', even though that is what it was already set at. Even then, Under the "PCM Devices" boxes, there are none available. Even without a PCM device available, I can play .wav files, so I guess I don't understand what the PCM output device does. Is there a way to prevent the mixer from being made the default (and only) audio device if I happen to mistakenly leave it connected? And what happened to my PCM devices? I searched fairly extensively, but all the things I found had to do with sound cards not working at all. Oddly enough, the mixer worked flawlessly under Linux the first time and was easier to configure than it was under XP. I just want the configuration to revert to the internal sound card after I unplug the mixer. Any help on this?? I've only been using Linux (this time) for about 5 months, and I guess I'm just not understanding what program is changing this, or why.

17 years, 4 months

Re: [LAU] [ANN] jack-keyboard 2.3

by schoappied

Edward Tomasz Napierala wrote: > On 0318T1739, schoappied wrote: > >>>>> Version 2.3 of jack-keyboard can be downloaded from: >>>>> >>>>> http://pin.if.uz.zgora.pl/~trasz/jack-keyboard/jack-keyboard-2.3.tar.gz >>>>> >>>>> List of changes is here: >>>>> >>>>> http://pin.if.uz.zgora.pl/~trasz/jack-keyboard/changelog.html >>>>> >>>>> jack-keyboard is a virtual MIDI keyboard - a program that allows you to >>>>> send JACK MIDI events (play ;-) using your PC keyboard. It's somewhat >>>>> similar to vkeybd, except it uses JACK MIDI instead of ALSA, and the >>>>> keyboard mapping is much better - it uses the same layout as trackers >>>>> (like Impulse Tracker) did, so you have two and half octaves under your >>>>> fingers. >>>>> >>>>> >>>>> >>>>> >>>> I still find it difficult to connect jack-keyboard on the right way to >>>> for example rosegarden or qsynth. Never got some sound of it... >>>> >>>> >>> JACK MIDI vs ALSA MIDI issue, I guess? Does it work for you with JACK >>> MIDI-enabled applications, like Ghostess? >>> >>> >>> >> ghostess with whysynth is working... yes. >> >> tell me please what the most simple connection with jack keyboard to get >> sound. >> > > Either a2jmidid or "-X seq" option to jackd. > > Can you give a screenshot of the jackconnections in either jack connect or patchage?

17 years, 4 months

Presentation: ORL from the AMMD and Sebkha-Chott

by Aurelien

Hello, This is my first post on this list, so I guess I've to present myself. I'm ORL, founder and member of the FREE label AMMD (www.ammd.net) which cares about bands and artists producing free arts with some social, ecological, shares, and so on principles! This label has already produced some CDs (Sebkha-Chott's debut and second albums, Mel-P's maxi and La Muette's firts album), and is currently building a free studio to produce free arts only. I think I'll get back to that subject on the list later. And I'm also bass player and singer in Sebkha-Chott (www.sebkhachott.net) a French avant-garde and experimental metal band quite theatralized. I work under Debian for years now, but I have been doing quite less concerning audio (essentially composition with Rosegarden/Lilypond). I think I'm gonna redempt right now! Regards, -- ============================== ORL /// AMMD Booking (www.ammd.net) ° Sebkha-Chott (www.sebkhachott.net - Ohreland [FR]) - next touring period: 04-06/2008 ° Unexpect (www.unexpect.com - Montréal [CA]) - Europe tour w/ Sebkha-Chott period: 09-12/2008 ° La Muette (www.myspace.com/muette - Paris [FR]) - next touring period: 03-05/2008 ° Mel-P (http://melpmusic.websanslimit.net - Le Mans [FR]) - next touring period: 01-04/2008 Phone: +33 (0)95 234 72 48

17 years, 4 months

streming question

by Juan Fabián Simón

Hi all, i've been making some streming of ogg files with icecast2 for a local radio, and it's doing the job very well. But i'm planning to make a "true" radio program and i need to talk between tracks. So what i need is a software capable to pick audio (voices in most cases) from my soundcard's mic/line input and stream it to an icecast2 server. I've been trying to use muse from dyne.org without success. Does anyone had success with it or maybe with another software? Thanks, see you in the waves ;) fabi.

17 years, 4 months

[ANN] jack-keyboard 2.3

by Edward Tomasz Napierala

Version 2.3 of jack-keyboard can be downloaded from: http://pin.if.uz.zgora.pl/~trasz/jack-keyboard/jack-keyboard-2.3.tar.gz List of changes is here: http://pin.if.uz.zgora.pl/~trasz/jack-keyboard/changelog.html jack-keyboard is a virtual MIDI keyboard - a program that allows you to send JACK MIDI events (play ;-) using your PC keyboard. It's somewhat similar to vkeybd, except it uses JACK MIDI instead of ALSA, and the keyboard mapping is much better - it uses the same layout as trackers (like Impulse Tracker) did, so you have two and half octaves under your fingers. -- If you cut off my head, what would I say? Me and my head, or me and my body?

17 years, 4 months

Re: [LAU] loud noise out of external soundcard in the bandroom when AC-powered

by Sampo Savolainen

Quoting Matthias Schönborn <mbs1303(a)gmx.de>: > Hello list, > > When playing with my band in the bandroom, I'm recording the whole > session > with ardour and playing the phasex resp. zynaddsubfx via a midi keyboard. > To > do this, the outputs of my external soundcard (m-audio fast track pro) > are > plugged into the PA. Because the sound is very much amplified, an > incredible > noise can be heard when no one's playing, approximately as loud as two > people > talking (yes, it's very annoying!) - however, yesterday I noticed that > this > only happens when my laptop is AC-powered! If it runs on batteries, it's > > completely silent and there's no noise in the background. You have a ground loop in your system. First a warning, whatever you do: do NOT disconnect any earthing pins from any equipment to defeat the loop. Doing such things will put you and your equipment at danger. You can try a few things, like connecting your laptop PSU and amp power to adjacent terminals. This can help if your laptop PSU is earthed. The best solution (and the one which works almost every time) is to use a transformer to isolate the laptop and the PA system. This can be in the form of a specialized transformer isolator (available usually with RCA-RCA connectors) or a stereo DI box with a ground lift switch. Sampo

17 years, 4 months

EQing headerless raw audio

by Simon Williams

Hello. Part of my group project involves a music playing system. What we have is a bunch of stages connected together with buffers and pipes. The first stage decodes an mp3 file with mplayer and sends the raw audio down the pipe in 44.1KHz 16bit. No headers are ever sent (as far as I know). What I'm trying to do is add an EQ stage. The problem is that the samples which come in seem to be equalised to the maximum level possible with 16bit. Therefore if I increase the volume of any band it will cause clipping. The only solution I can think of at the moment is to just EQ down, but that sucks a bit. Can anyone shed some light on what it is I'm doing wrong? Thanks. Simon

17 years, 4 months

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Linux-audio-user March 2008