Linux-audio-dev June 2003

linux-audio-dev@lists.linuxaudio.org

85 participants
85 discussions

[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, 6 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, 6 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, 6 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, 6 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, 6 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, 6 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, 6 months

[linux-audio-dev] horgand v1.0

by holborn

Hi! New Release : horgand 1.0 News in v1.0 (19/06/2003) ------------- -Added small auto-accompaniment, Looped Drums and a Bass line in a wave table way. -added chord recognition -some free drum loops and bass samples. -bugs solved in DSP effects, now more stereo, minus noises :-) First i want to say something, personally i dont like any kind of auto-accompaniment, sequences, organs, because many people use it for work, and this is not good for the musiciens. In fact i wonder the day when the musiciens dont want to record anything, anymore. Only write the papers, and play live, that's music. Please read the Readme file for how to add new loops and other questions. REQUERIMENTS: * FAST COMPUTER * LINUX * ALSA * JACK * FLTK 1.1 Web Page : http://personal.telefonica.terra.es/web/soudfontcombi/ Josep

21 years, 6 months

[linux-audio-dev] Subharmonic synthesizer, is there one?

by Kimmo Sundqvist

Hello I'd like to know if there is a subharmonic synthesizer for linux. That is a plugin which adds low frequency content to sound not by boosting, but by synthesizing frequency components that are below what the signal otherwise contains. I'm thinking about something like Delaydots Phat Pro. If there is no such thing, is anyone thinking about developing one? -Kimmo S.

21 years, 6 months

[linux-audio-dev] Re: Tune for read (reiserfs)

by Andrew Burgess

>I have two linux computers with ext3 and reiserfs file systems >cat /proc/sys/vm/bdflush >echo "100 200 64 512 31 2000 50 1884 2" > /proc/sys/vm/bdflush >breaks again sounds little bit shorter >does somebody knows best paremeters >for comands >elvtune -r -w >echo "p1...pn" > /proc/sys/vm/bdflush This does it for me: echo 10 0 0 0 50 300 60 0 0 > /proc/sys/vm/bdflush for x in a b c d e f g h; do elvtune /dev/sd$x -r 512 -w 1024 elvtune /dev/hd$x -r 512 -w 1024 done I also renice the sound programs to -19 I don't use any special kernels yet.

21 years, 6 months

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Linux-audio-dev June 2003