Linux-audio-dev

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3 participants
7440 discussions

Re: [linux-audio-dev] New form of GPL licence that protects Linux from proprietary world [was: New powermacs?]

by krautj＠earthlink.net

On Sat, 21 Jun 2003 20:22:37 -0400, "Ivica Bukvic" wrote: >Thanks! This really helped me see straight again :-). > >However this brings up one interesting point/problem. Due to GPL nature >of Linux software, many of our efforts will seamlessly bleed into OS X >world since there are no restrictions as to which platform this software Seemless is right. Check it out (the results of a recent effort to port the Gentoo package system (portage - the backbone of Gentoo) to OS X: http://metapkg.org and on the Gentoo homepage (gentoo.org) Gentoo/MacOS X announced... thank you python! And I believe this is good for OSS, since it potentially brings more users into the OSS world, even (in the case of Gentoo/MacOSX) if it's kind of half and half. -------- Jonathan Kraut krautj(a)earthlink.net (current email - changes from time to time) jak76(a)columbia.edu (life long email)

21 years, 3 months

Re: [linux-audio-dev] New powermacs?

by cliffw＠easystreet.com

> Hi all, > >[snip - mac news - ] > > Please don't get me wrong. I am still in favor of Linux, obviously due > to its open architecture. But at the same time I am becoming a bit weary > of having to "hack" my advanced audio settings rather than use > user-friendly tools. That, coupled with still anemic direct vendor hw > driver support has really made me pay closer attention on Macs (as scary > as that sounds). Yet, I feel such a sense of accomplishment when my > Linux purrs just right with my desktop being uniquely configured and > tailored to my needs. After all, I am a geek. :-) And the inner struggle > goes on... > > Anyone care to comment or (please) dissuade me from potentially making a > costly mistake? ;-) > Well, i'm messing with a used iBook G3/500 right at the moment. OS X does look nice, and the few OS X audio apps i demo'd are solid. And, dual-booting w/Debian unstable was dead easy to do, i have OSS audio working jest fine with the built-in set, and i'm hoping to do ALSA via USB audio soon, which will be kewl. I like the hardware platform. The display is noticeably better than most Intel laptops, certainly better than the used ones i was comparing to. The Firewire Just Worked, right from the Debian install kernel. I've been using it with a IDE -> firewire disk carrier. The unit is solid. The built-in audio is okay, my model has no real inputs (built-in mic) - you would definately be using USB or firewire for Real Work. Using Open Firmware at boot instead of BIOS is sweet. With Linux, performance is fine, even with the 500mhz chip. The OS X on the other hand, is noticeably slooower than Linux (2.4.21 + 2.5.72 kernels ), especially at reboot. And the Mac world is insanely closed, it actually surprized _me how little choice you have with OS X - near as i can figure, you buy most everything from Apple, pay a bunch more money than a comparable M$ product, or suffer. And since they are _not a huge monopoly, they seem to have little shame about being closed - i was very amused by the way they attempt to corral the first-time user into signing up for .Mac (Apple's version of MSN) during the OS X install, iTunes also. The main thing-that-makes-me-nutbar is the keyboard layout. That's fixable with X, and you can set up keymappings with sysctl for some Mac-specific things. Main installation pain is the Mac version of fdisk, which is....terse. So in conclusion, i'd say the iBook + external converter (USB/fire) would make a fine Linux audio laptop. Get a decent sized disk, and you can dual-boot with OS X, and that will motivate you to run Linux again. :) cliffw (PS - http://www.penguinppc.org - is a good start point for Mac links) > Ivica Ico Bukvic, composer & multimedia sculptor > http://meowing.ccm.uc.edu/~ico > >

21 years, 3 months

Re: [linux-audio-dev] New powermacs?

by John Lazzaro

> "Ivica Bukvic" <ico(a)fuse.net> writes: > > Anyone care to comment or (please) dissuade me from potentially > making a costly mistake? ;-) I don't think it needs to be either/or -- I run sfront under Linux at work doing real-time things, and I run sfront at home using OS X doing real-time things, and both more or less work OK. Personally, I think the biggest issues are the different approaches OS X and Linux takes on real-time scheduling (constraint scheduling for OS X, SCHED_FIFO and friends for Linux), and on the need and methods for keeping the application in RAM to avoid swapping (the sfront OS X port took at lot of work to get this right, and in some ways sfront has a simple memory usage pattern ...). I think Linux may have something to learn from OS X on the former issue, and OS X may have something to learn from Linux on the latter issue -- at the moment at least, the "lazy swap-in" in OS X, even when the machine has hundreds of MBytes sitting unused, forces the application to do its own implicit memory management to avoid artifacts during start up. ------------------------------------------------------------------------- John Lazzaro -- Research Specialist -- CS Division -- EECS -- UC Berkeley lazzaro [at] cs [dot] berkeley [dot] edu www.cs.berkeley.edu/~lazzaro -------------------------------------------------------------------------

21 years, 3 months

[linux-audio-dev] 2.5.72 + ALSA + jack == happy monkey

by cliffw＠easystreet.com

Wanted to post a quick success story with the 2.5 kernel series: Machine processor VIA C3 Ezra cpu MHz : 932.918 bogomips : 1843.20 256MB ram Multimedia audio controller: VIA Technologies, Inc. VT8233 AC97 Audio Controller (rev 50) Debian unstable. This is the little VIA mini-itx I use for email, horrible little built-in Via audio. Built linux-2.5.72 from BK source, installed ALSA 0.9.4 libs+goop, built jack 0.71.2 from debian source, also had to recompile alsaplayer (from cvs) After that, it Just Works. As i said, horrible chipset, but with jackd --tmpdir=/mnt/ramfs --realtime -P 20 -d alsa -d via82xx:0,0 -p1024 -n3 -r 32000 -s -zr -P & I can stream mp3's from my SLiMP3 server to alsaplayer (text) with no dropouts, while running KDE3.2 and typing this email! I made a few passes at this machine with 2.4, but i could _not get useable audio - overwhelmed by pops and crackles. Thanks everyone. I have the M-Audio MobliePre USB recognized also, but no sound there yet. cliffw

21 years, 3 months

[linux-audio-dev] severe FS corruption w/ reiserfs and 2.5.72-bk3

by Joern Nettingsmeier

a word of warning: i just completely and utterly trashed my filesystems with 2.5.72-bk2 and reiserfs. there are metric shitloads of errors on journal replay and i end up in repair mode. did a couple of --rebuild-tree's, but new errors cropped up after every reboot. happens both on scsi and ide drives and ate almost all of my machine... my reiserfstools are recent (can't recall the version, but it's better than or equal to the one listed in Documentation/Changes). otoh, it seems i had two versions installed, the one that comes with suse 8.1 in /sbin/ and mine in /usr/local/sbin. after realizing the problem, i moved the current version over to /sbin so that it is invoked on startup... might have made the problem worse. unfortunately i did a number of things at once: upgrade the kernel from .72 (which has worked for me quite well), add an ide drive (i didn't have ide in my kernel before, and geez! is that module code broken :)) and shuffle partitions around. which makes the problem hard to pinpoint. if anyone wants me to do some forensics on the machine, speak up. otherwise i'll swipe it clean and start over from scratch. best, jörn (i'd appreciate a cc: of your replies. thanks.) -- All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations. -- Charter of the United Nations, Article 2.4 Jörn Nettingsmeier Kurfürstenstr 49, 45138 Essen, Germany http://spunk.dnsalias.org (my server) http://www.linuxdj.com/audio/lad/ (Linux Audio Developers)

21 years, 3 months

[linux-audio-dev] horgand-1.01

by holborn

Hi! again ... Hi! New Release : horgand 1.01 News in v1.01 (21/06/2003) ------------- -Fixed Bass frequencys, now are tuned :-) -Master Transpose transposes the bass line too. -Master MasterTune tunes the bass line too. -Added more chords to recognition. -Fixed small bugs in split, chords ... REQUERIMENTS: * FAST COMPUTER * LINUX * LIBSNDFILE * ALSA * JACK * FLTK 1.1 Web Page : http://personal.telefonica.terra.es/web/soudfontcombi/ Josep

21 years, 3 months

[linux-audio-dev] Re: idea: wavelets, sampler program

by Tom Weber

> There may be some problems... > > - What about noise-like signals ? The brain treats all sound in a fourier representation, noise also. Don't you think noise sounds like thousands of different beeps? The computer representation would be no different. > - For a resolution of 0.1 Hz you need 10 seconds of sound. Only a real > sine wave lasting the whole 10 s will tranform as a 'peak', everything > else will be smeared out. Hmm, are you sure? I would agree on that for a 0.1 Hz signal, which is not the case. Assume the sound contains a 100.0 Hz signal, then the analyzed amplitude (using sin and cos for phase independency) should be higher for 100.0 Hz than for 99.9 or 100.1, even for short periods. But I'm a newbie to DSP... What I actually aim at doing is a "sampler" program/plugin with pitch scaling, using this "complete fourier transform" approach to overcome the problems listed in: http://www.dspdimension.com/html/timepitch.html Any suggestions?

21 years, 3 months

[linux-audio-dev] Re: [linux-audio-user] horgand v1.0

by holborn

Hi! > fluid -c HORGAN.fl > make: fluid : Commande introuvable > make: *** [all] Erreur 12 > > in english, make can't find the fluid command. Is it fluidsynth-related? > fluid is the Fast Light User Interface Designer, comes with x11-libs/fltk in Gentoo distribution, in a Debian the package is fluid .... sorry i dont know in other linux distributions, maybe you can easy find. Josep

21 years, 3 months

[linux-audio-dev] idea: wavelets of variable frequencies

by Tom Weber

Hi! I just joined this list. I have an idea for a sound format which is similar to spectrum analysis (but better?): represent the sound as a synthesis of sinus waves where the frequencies are free and can change with time. Instead of doing a discrete fourier transform when reading a small frame of the sound, do a dense transform (every 0.1 Hz?) and pick out the peaks. Then assume that a similar enough frequency in the next frame comes from the same source, keep joining those and your sound will be represented by a lot of oscillators (wavelets) with amplitude and frequency curves. I guess this would overcome the weaknesses in having fixed frequencies. This idea shouldn't be new, where can I read about it? Has it been implemented anywhere? Thanks in advance, Tom Weber

21 years, 3 months

Re: [linux-audio-dev] patches for kernel 2.4.21 ?

by cliffw＠easystreet.com

> Maarten De Boer wrote: > >>and that seems strange? ;-) > > [snip] > > > > anyway, i talked to andrew morton, and he suggests that it is better > > to go for 2.5.x ... > > i have been running 2.5 since patchlevel 68, and it has been working > great for me. i have made no comparative measurements with 2.4+lowlat, > but it "feels" good and is very stable - even most of linus' bitkeeper > snapshots have been ok. > disclaimer: mine is a scsi-only system... > > i'd encourage people to try 2.5 to iron out audio-specific problems > before we go into 2.6-test and the developers get nervous... > I'd second that. I've been running 2.5 on two boxes for awhile. One is a VIA C3 (via82xx) the other is a PIII. (ice1712) Both IDE, both working fine on 2.5.x (Haven't finished sorting out the PIII audio yet, however - total Lack of Free Time) The 2.5 kernel is moving into the 'must-fix' stage, so now is the time to start running it....and send in those bug reports.. (http://bugme.osdl.org is a good place to cc: 2.5 reports,btw ) cliffw > jörn > > > -- > All Members shall refrain in their international relations from > the threat or use of force against the territorial integrity or > political independence of any state, or in any other manner > inconsistent with the Purposes of the United Nations. > -- Charter of the United Nations, Article 2.4 > > > Jörn Nettingsmeier > Kurfürstenstr 49, 45138 Essen, Germany > http://spunk.dnsalias.org (my server) > http://www.linuxdj.com/audio/lad/ (Linux Audio Developers) > > > > >

21 years, 3 months

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Linux-audio-dev