Linux-audio-user June 2005

linux-audio-user@lists.linuxaudio.org

153 participants
135 discussions

[linux-audio-user] hello gentoo? speed up please...

by Aaron Trumm

hello all - got a question - I've only recently been stopping and taking a look at my studio computer's performance and in the almost year since I change from Red Hat 9 to gentoo, it's been more solid on some things, but I notice a huge latency difference - ie: I have to run Jack at -p 8192 to get anything done in Ardour Anybody have any tips on what to look at to tweak it? Seems like it should do better than that... I didn't see it as a problem until in the last few days I started playing with playing softsynths live directly into Ardour - you've gotta be running at -p 1024 or there's a latency that screws up your playing - at 8192 it's a downright 8th note delay... Here's some vitals that I can think of: OS: gentoo 2.6.6-rc1 kernel (alsa built in) jack: 0.99.0 ardour: beta28 jack command line: jackd -R -d alsa -d hw:0 -r 48000 -p 8192 <------- (or whatever) harddrive: multicount on io support: 32 bit unmaskirq on use dma on keepsettings off readonly off readahead on chip: 2ghz amd (I THINK - not at computer now) ram: 512MB thanks for any ideas! :) --------------------- Aaron Trumm www.nquit.com -----------------------

17 years, 6 months

[linux-audio-user] Announce for new Distro .....PClinuxOS" and Thac's packages

by Russell Hanaghan

Hi Folks, So, I have spouted off about a distro before (I know some of you checked it out) and it was not as good as I hoped it would be! :( Trust me...THIS is not the case this time!!! Announcing PClinuxOS (PCLOS for short) http://www.pclinuxonline.com/pclos/ This is based on Mandrake but minus the bloat! One ISO built as a LiveCD! You can boot it and not install...no commitment unless you want to. The install is simple as can be and fast. KDE 3.4, Fluxbox, Gnome, etc. The distro was started by Texstar who used to build packages for Mandrake a few years ago. So, whats that got to do with Music?? Just this; Thac has decided to start packaging for PCLOS just as he has with Mandrake. For those not familiar with his work... http://rpm.nyvalls.se/sound10.1.html I have relied on Thac's RPMS for audio since I started Linux audio work. He keeps his packages updated and has about everything worth having in his repositories. They have been invaluable to me. As recently as yesterday, Thac has started his own 3rd party Apt repository for PCLOS and as I write I am downloading the first of his packages and new mm kernel, etc. We are chatting on the Pclinuxos IRC chat room and ironing out a few minor bugs. It will be a few days before he has all of his packages done. Texstar suggested that we might make a liveCD with the key audio apps and a R/T kernel for easy usage and evaluation. Obviously some time is needed to work the bugs out but this is very likely in the not too distant future! I should think those of you working with MDK right now would see this as an easy step....others...well, the proof will be in the pudding. More soon.... R~

18 years, 5 months

[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

18 years, 7 months

[linux-audio-user] alsa 1.0.9 usb midi controllers

by James Stone

I have just upgraded to alsa 1.0.9 and the midi controllers on my evolution mk-249C no longer work.. Has something changed with the alsa config files? Anyone else see this problem? I can't find anything of help by googling.. Any help would be appreciated! All the best, James

18 years, 8 months

[linux-audio-user] Keyboard software and hardware

by Shaun Jackman

Hello, I'd like a simple keyboard for plonking out notes to help me learn my choral music. First, I'd like a piece of software that accomplishes this by using my usual PC keyboard. Second, I'd like actual keyboard hardware that can operate by itself, or connected to a computer through either USB or MIDI (preferably both). I don't want any extraneous features on the keyboard, although I'd be interested in hearing what features people find particularly useful. Velocity sensitive keys that feel like a piano to some degree would be a major plus, but that mostly depends on the difference in price. Any suggestions? Cheers! Shaun

18 years, 9 months

[linux-audio-user] Music made with linux... short song

by MarC

(http)www.telefonica.net/web2/mrvinyes/litlnemo/songs/litlnemo-S08.ogg Opinions?

18 years, 9 months

[linux-audio-user] EMU1212m support

by Lee Revell

Someone brought this device to my attention: http://www.emu.com/products/product.asp?product=2209&category=754&maincateg… Creative may donate a device to an ALSA developer to develop the necessary support, if they think Linux users would be interested. There is already a volunteer to develop the driver support. If you would consider buying this device were it supported (I certainly would) please contact Creative and politely ask them. I think if just a few people write them along the lines of "I really like looks of the 1212m, and I'd like to buy one, if I could use it with Linux. Can you provide one to the ALSA developers?", they will do it. Every person who takes the time to contact them, they will assume represents N users. Lee

18 years, 9 months

Re: [linux-audio-user] Re: What parts of Linux audio simply suck ?

by Sampo Savolainen

Quoting Christoph Eckert <mchristoph.eckert(a)t-online.de>: > We all would be glad if we didn't need to patch and recompile > the kernel. BUt there's hope that we get realtime > capabilities in the vanilla kernel soon. Let's stay tuned. You are a bit late actually. :) >From 2.6.12 changelog: "commit e43379f10b42194b8a6e1de342cfb44463c0f6da Author: Matt Mackall <mpm(a)selenic.com> Date: Sun May 1 08:59:00 2005 -0700 [PATCH] nice and rt-prio rlimits Add a pair of rlimits for allowing non-root tasks to raise nice and rt priorities. Defaults to traditional behavior. Originally written by Chris Wright. The patch implements a simple rlimit ceiling for the RT (and nice) priorities a task can set. The rlimit defaults to 0, meaning no change in behavior by default. A value of 50 means RT priority levels 1-50 are allowed. A value of 100 means all 99 privilege levels from 1 to 99 are allowed. CAP_SYS_NICE is blanket permission. (akpm: see http://www.uwsg.iu.edu/hypermail/linux/kernel/0503.1/1921.html for tips on integrating this with PAM). Signed-off-by: Matt Mackall <mpm(a)selenic.com> Acked-by: Ingo Molnar <mingo(a)elte.hu> Signed-off-by: Andrew Morton <akpm(a)osdl.org> Signed-off-by: Linus Torvalds <torvalds(a)osdl.org>" Sampo Savolainen

18 years, 9 months

[linux-audio-user] Low latency USB 1.1 card?

by Christoph Eckert

Hi, my terratec card provides very high latencies (more than 40msecs), so I wonder if there are cards out there which are USB 2.0 compliant but can be used on my USB 1.1 machine (until I get a new one) at low latencies. Anyone can tell about such a card? I do not need MIDI ports, but full duplex 2 in 2 out with a mic in and a headphone out would be great. More ins and outs are welcome. Because I'm a hobbyist, the cheaper the better ;-) . Thanks & best regards ce

18 years, 9 months

[linux-audio-user] demudi apt sources

by Eric Dantan Rzewnicki

[after writing this I found http://lists.agnula.org/pipermail/users/2005-June/006358.html in the agnula-users archive. many of the same points are raised, but it appears not yet corrected in the wiki.] [and now I've found and have begun reading the more recent thread: http://lists.agnula.org/pipermail/users/2005-June/006417.html still I'm wondering which of the deb lines below is correct] There seems to be some inconsistency on the agnula pages on the correct apt sources line. I want to try adding demudi to a fresh debian sarge install. Here: http://demudi.agnula.org/wiki/InstallApt it says use this: deb http://demudi.agnula.org/packages/demudi testing main and in the FAQ: http://demudi.agnula.org/wiki/DocumentsFaq#Upgradingexistinginstallations it says use this: deb http://apt.agnula.org/demudi testing main local extra Are those 2 apt sources the same? if not which is correct? These instructions from the FAQ are somewhat confusing: "* from the command line issue: # apt-get install demudi * install the tasks you are interested in. To have a look at them run: # apt-cache search demudi The task demudi installs them all." It should probably tell the user to apt-get update after editing sources.list. Also, the two statements above appear to be contradictory, or at least out of order. Installing package demudi appears to only install some pixmaps and pngs. Attempting to install any of the demudi-<foo-task> packages returns saying that it's not available and is replaced by demudi. Maybe these only work if you use taskselect? I must be missing something pretty basic here. -- Eric Dantan Rzewnicki | Systems Administrator Technical Operations Division | Radio Free Asia 2025 M Street, NW | Washington, DC 20036 | 202-530-4900 CONFIDENTIAL COMMUNICATION This e-mail message is intended only for the use of the addressee and may contain information that is privileged and confidential. Any unauthorized dissemination, distribution, or copying is strictly prohibited. If you receive this transmission in error, please contact network(a)rfa.org.

18 years, 9 months

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Linux-audio-user June 2005