Linux-audio-user November 2008

linux-audio-user@lists.linuxaudio.org

174 participants
151 discussions

by Brian Bergstrom

Hi all, I have been trying to switch my live performance laptop from using specimen to LinuxSampler because it has quite a bit more features and such, but I can get LinuxSampler to work correctly. All the audio output is distorted in a bad way and kind of varies, some samples i can make out but are garbled or crackly, while some sqeel and other sare just static. I have tried my setup on two different laptops, one running 64studio 2.1 with a Cirrus Logic Sound Fusion CS46XX and another running UbuntuStudio 8.04 with an internal intel-hda card. I also tried both my usb audio devices, a M-Audio Ozone and an Edirol UA-4fx, through jack on both laptops. I also tried upgrading from the stable ALSA which i belive was 1.0.13 for etch to the backport 1.0.17. I also tried turning down levels in alsa mixer, my gig instrument, my sampler channel and the sampler master. I then proceeded to build LinuxSampler from source and tried that. All off these attempts gave me the same distorted result coming out of my speakers. Does anyone know why this is happening or have an idea to try? Thanks, Brian

16 years, 10 months

scaling parameters in Ingen

by Hector Centeno

Hello, I'm testing using Ingen together with ladosc plugins (LADSPA OSC), which basically sends OSC data between two LADSPA host applications . I got a successful connection between Ardour and Ingen but the problem is that the oscout plugin outputs parameters from 0 to 4 only. If I connect that signal to another plugin's parameter inside Ingen then I can't use the full range of that parameter (if it's range is > 4). First I thought that the Input/Control and Output/Control modules in Ingen (available under the Input and Output submenus) could be used for this but actually I don't understand what it's real use (are they for OSC in/out to/from Ingen?). Is there any way to scale parameters? Any help would be appreciated. Cheers, Hector

16 years, 10 months

no realtime priority possible with wdm/openbox

by Atte Andrê Jensen

Hi I have a cpu-hog problem with my debian/lenny and someone suggested it might be caused by gnome. So I installed wdm (instead of gdm) and openbox to completely bypass any gnome stuff. However when I log in from wdm to openbox I cannot start jack with realtime priority, I get this in the messages window of qjackctl: 15:45:00.693 Patchbay deactivated. 15:45:00.695 Statistics reset. 15:45:00.705 JACK is starting... 15:45:00.706 /usr/bin/jackd -R -P80 -dalsa -dhw:1 -r44100 -p256 -n3 -s 15:45:00.723 ALSA connection graph change. jackd 0.109.2 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. cannot use real-time scheduling (FIFO at priority 10) [for thread -1209067856, from thread -1209067856] (1: Operation not permitted) cannot create engine 15:45:00.750 JACK was started with PID=14293. 15:45:00.763 JACK was stopped successfully. 15:45:00.763 Post-shutdown script... 15:45:00.764 killall jackd 15:45:00.909 ALSA connection change. jackd: no process killed 15:45:01.170 Post-shutdown script terminated with exit status=256. 15:45:02.913 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info. Esp the "cannot use real-time scheduling (FIFO at priority 10) [for thread -1209067856, from thread -1209067856] (1: Operation not permitted)" seems to nail the problem. What should I do to make it possible to start jack with realtime priorities and why does it have anything to do with gnome? I've been using this combo (wdm/openbox) in the past with no problem... -- Atte http://atte.dk http://modlys.dk

16 years, 10 months

Audacity strange behavior

by Folderol

As a double blind test when seeing what changes were made to Wav files when translating to and from Flac, I also used Audacity to make a direct copy using 'Export'. To my surprise, the copy had a different md5sum signature. Thinking that the export operation might be creating the differences I exported another copy, but this turned out to have a different signature to both the previous ones. A third copy was again different to all the others. Listening to the files I could detect no difference, nor could i see any difference in Audacity, even when stretching the display enough to see the actual waveforms. It occurred to me that the differences might be due to some sort of timestamp embedded into the file header (I don't really know what meta-data Wav files contain) so I looked at the files in a Hex editor, cecking at several identical locations through the files. They all showed up as different, and it wasn't just the same pattern but shifted a few bytes. Can anyone suggest what might be happening here? -- Will J Godfrey http://www.musically.me.uk

16 years, 10 months

Qtractor vs Rosegarden

by Matthew Smith

Hi Folks After many attempts at building Rosegarden, both with the Gentoo ebuilds and now by hand, with updates to KDE libraries, etc., it still crashes. Too much time wasted, three months on and I still haven't made a note of music. I have now moved onto Qtractor - this was mentioned in an earlier thread and appealed to me as it is not infected with KDEitis. Qtractor builds, it runs, it doesn't crash (yet). Woohoo! Having had a quick look over it, the interface looks cleaner and less overwhelming than Rosegarden. Just out of interest, what - if any - are the pros and cons of Rosegarden versus Qtractor? For myself, as an unsophisticated user, is Qtractor (as it appears) all I'll ever need? Cheers M -- Matthew Smith Smiffytech - Technology Consulting & Web Application Development Business: http://www.smiffytech.com/ Personal: http://www.smiffysplace.com/ LinkedIn: http://www.linkedin.com/in/smiffy

16 years, 10 months

music page updated

by Dave Phillips

Greetings, Just a note to indicate that I've updated my Ardour music page : http://linux-sound.org/ardour-music.html No new pieces, just an update to include some of my recent noise. Best, dp

16 years, 10 months

Introduction

by Brentt

Hello, I'm brand new to the list. About me: I'm trying out Linux audio because all the marketing in the mainstream pro-audio market makes me queasy. Also I'm interested in getting into development (when my coding gets up to par--long way to go, and then knowledge of DSP--fortunately I have a natural interest in mathematics as well as music) and getting familiar with open-source programs seems a good route. But more than anything I love making recording music (electronic and acoustic)and have been doing it off and on for well over a decade. I started out recording with 2 tape recorders, bouncing back and forth...then bought a four-track, a year later I discovered that editing with Cool Edit Pro was much easier than a 4 track, even though Cool Edit didn't actually have tracker...even mix pasting wavs is easier to do than using a fourtrack. Eventually I moved on to Cubase, Reaktor, and other VSTs (I also used Reason for a while, but eventually came to disdain it). I'm hoping Linux will workout, and that it can eventually come to be a good platform for audio if its not already (I dont know, because I'm just starting out). So I guess I'm going to start with Rosegarden...that seems to be where to start right? I've also I'm a novice at Linux (used to prefer to do my school C++ programmig assignments using emacs and GCC, so I had a machine for that). But never used it for audio. I'm working on a machine with the Debian Studio 64 setup (is this a good place to start?). But I havn't got an audio-card yet (I was using a M-Audio Delta 1212 on my win machine but it broke so I'm in the market for a new card). I've been trying to find out which mid-range pro-audio cards are stable in Linux (as a coworker at an internship I had would call it: a "pro-sumer" audio card). I've done a couple searches of the archives, and no specifics came up. Just a post about there being support for high end stuff, but no midrange stuff. Is this still true? Did I miss any postes with up-to-date specific audio card recommendations for a mid-range set up (seems like it might be a question that might be asked often enough). Something under $200 preferably. Is this doable? Looking forward to engaging the list, and constructively contributing when I get up to speed. I would rally like to see Linux Audio platforms take-off.

16 years, 10 months

Re: [LAU] Single Play MP3 player

by carmen

your laptop is going to get stolen and beer poured on it.. plus why waste all those wawtts just to play a mp3? you want the 19 euro MP3 player from ALDI, next to the candy bars in the checikout aisle

16 years, 10 months

Montréal Sound Map

by Max Stein

La version française suit la version anglaise Call for participation in documenting Montreal's Soundscape http://cessa.music.concordia.ca/soundmap The Montreal Sound Map is ready for submissions. We are accepting all (unprocessed) audio recordings (past and present) of Montreal's sound environments. Our goal is to gather and display as many recordings as possible from all over the island. As we gather submissions, we will be placing them into a browseable tagging system based on criteria including: Sound Source (specific, characteristics) Location (borough, neighbourhood, municipality) Date (time of day, month, day of week, year, season) Environment Type (park, metro, indoors, outdoors, etc...) Equipment (recording device, microphone, etc...) Files can be uploaded through the form on the website. For more information, please visit the about page. ~ Participez à la complétion de la carte sonographique de Montréal. http://cessa.music.concordia.ca/soundmap/fr Il vous est maintenant possible d'envoyer des fichiers audio (enregistrements récents ou non, non-édités) pour participer à la complétion de la carte sonographique de Montréal. L'objectif est de rassembler le plus grand nombre d'enregistrements provenant de partout sur l'Ile. Les documents reçus sont incorporés dans une base de données accessible à tous. Les critères de recherches sont : Source sonores (caractéristiques) Lieu de l'enregistrement (banlieue, quartier, municipalité) Date de l'enregistrement (heure du jour, mois, jour de la semaine, année, saison) Caractéristiques du lieu d'enregistrement (parc, metro, intérieur, extérieur, etc.) Équipement utilisé (outil pour l'enregistrement, micros, etc.) Les fichiers peuvent être envoyés en remplissant le formulaire en ligne. Pour plus de renseignements, cliquer sur le lien "à propos". Best, Max -- CESSA www.cessa.ca The Concordia Electroacoustic Studies Student Association (CESSA) was established Fall of 2007. Our focus is primarily in spreading awareness of electroacoustic matters throughout Concordia and Montréal via projects and events, expressing particular interests in health, environmental, and social issues pertaining to sound.

16 years, 10 months

Single Play MP3 player

by Bob van der Poel

I've got a little gig at the end of the month for which I'll be using backing tracks. In the past I stuck midi files on my synth and lugged the beast to the gig. This time I figured it'd be just as good to create mp3 files of the midi's and play them off my laptop (using the laptop just because the screen is big enough to read for old guys like me). Only problem with all this is to find a suitable mp3 player program. What I really need is a list of the songs (preferably in playlist order, but that's not critical) and then I want to click a tune, have it play, and STOP. Just about every player (noatun, amarok) I've fooled with wants to play each song in its playlist. Not what I want ... I really do need to pause. I suppose I could write a little script with a <wait for key> loop, but there must be something I can use. Thanks. -- **** Listen to my CD at http://www.mellowood.ca/music/cedars **** Bob van der Poel ** Wynndel, British Columbia, CANADA ** EMAIL: bob(a)mellowood.ca WWW: http://www.mellowood.ca

16 years, 10 months

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Linux-audio-user November 2008