Linux-audio-user April 2005

linux-audio-user@lists.linuxaudio.org

163 participants
185 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 -----------------------

18 years

[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~

19 years

[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

19 years, 2 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

19 years, 4 months

[linux-audio-user] Re: Boa-Conductor (was re: Raton)

by David Baron

On Wednesday 19 January 2005 19:02, linux-audio-user-request(a)music.columbia.edu wrote: > > So how would Raton-Conductor work? Again, not as simple as it sounds. > > Minimally, one would move the mouse in a ecliptic (or circular) motion > > (as suggested by MagicBaton's instructions for beginners). The size of > > the vertical diameter (or average diameter) would be the > > volume/expression and tempo or time-codes set by the change in vertical > > direction from down to up. Real conducting patterns are more complex but > > these two principals would more or less remain. > > I started tinkering after I read your message, and I created a little > gadget that traces mouse motions and recognizes fairly general conducting > patterns. One can extract timing and intensity information for the purpose > of generating MIDI clock events as well as MIDI controller values. I'm > tentatively calling it Boa Conductor. Cool! > > I've got a few questions: > 1. Is anyone interested in a tool like Boa Conductor? What I've done so > far was just for kicks; I now have to decide how much time and effort > to put into polishing it. I, of course, would be interested. > 2. Are there any MIDI sequencers/players for Linux that can be driven > by external clock messages? My understanding is that Rosegarden does > not currently work as a slave but that may change in the future. > MusE can work as a slave, but I never used it before (has anyone > tried driving MusE with clock messages?). I don't think timidity > expects to be driven by a MIDI clock. How about other MIDI players? > 3. Would it make sense to have a feature that uses JACK Transport > rather than MIDI clock? There are a few alternatives. Not much that I have on Windows or Linux support clock messages. MagicBaton was a MIDI-player that added events based on the mouse-conducting. Alternatives: 1. Run the Boa in Parallel with whatever sequencer or player is going through jack or such. Boa would then put out simply omni/overall level and tempo events. 2. Run Boa as a plug-in Rosegarten, Muse or other such program. In this case, it would work on one track/channel and insert expression (and tempos) or in an omni mode as above. For rehearsing (MagitBaton's parlance) one track, one would probably want to disable tempo changes and conduct expression. Omin/overall would do level and tempo. 3. Controlling another software via midi-clock and some volume control device. This assume, naturally, that this software is available :-)

19 years, 4 months

[linux-audio-user] Behringer BCA 2000 - has anyone tried it ?

by Jan Holst Jensen

Hi. I see that Behringer has released a new gadget: http://www.behringer.com/BCA2000/index.cfm?lang=ENG Has anyone tried this thing ? Does it work with the generic USB audio driver or do we have to wait for ALSA drivers to become available ? I am _almost_ off to buy one :-). Cheers -- Jan Holst Jensen, Denmark __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail

19 years, 5 months

[linux-audio-user] Getting two sound cards to work in Debian sarge

by Mads Munch Hansen

Hi, I've been trying to get my two sound cards to work: an integrated SiS (S17012), and a SoundBlasterLive (EMU 10K1). Both were detected fine by alsaconf. But I am only able to get the SoundBlaster to play though XMMS, XMMS says it's at hw:1,0, where the SiS is at hw:0,0. there is also antoher entry in the XMMS ALSA configuration that says "Sound Blaster Live!: EMU 10k1 FX8010 (hw:1,3)" Have no idea why that is there.. Also, GNOME has aprantly switched over to using OSS, (I can see this in the volume controlls) how can I change this to alsa? Any help would be apperciated! :) -- Mads

19 years, 5 months

[linux-audio-user] Castblaster clone

by Mark Constable

Is anyone aware of what might be the best open source audio mixing package to start hacking something like the Castblaster that is aurally (partly) described where ? http://homepage.mac.com/dailysourcecode/DSC/DSC-2005-04-25.mp3 Any hints to shorten the devel cycle for a project like this would be gratefully appreciated. I'm chasing up some funding to hopefully subsidise a developer if one wants to get involved. No, tweaking PD is not my idea of getting aunt tillie into podcasting on linux, she needs a lightbulb that "just works" :-) --markc

19 years, 5 months

[linux-audio-user] Please test the RT rlimits patch for audio

by Jody McIntyre

The RT rlimits patch (nice-and-rt-prio-rlimits.patch) has been proposed as a solution to allow audio users to run their applications with realtime priorities. While more complicated to configure, it's a much cleaner patch than realtime-lsm and it's likely to get merged soon _if_ enough audio users test it and confirm that it works. To encourage this, I have created a wiki page containing installation instructions, links to prebuilt PAM packages, etc: http://www.steamballoon.com/wiki/Rlimits If this works for you, I am collecting success reports. Please email rlimits-success(a)steamballoon.com . If you have any problems with it, LAU is probably the best place to ask for help. Unfortunately I don't have large amounts of time to spend helping people with this, so any help requests emailed to me directly may be deleted without a reply. Sorry. Thanks for testing! Jody

19 years, 5 months

[linux-audio-user] MIDI exported from Cakewalk sounds horrible!

by ross＠jose.lug.udel.edu

Hello all, I used to use Cakewalk on a small Windows partition for composing work. Now, I'm trying to take the midi files I'd exported from Cakewalk and play them using rosegarden/fluidsynth/pmidi. My songs sounds like a cacophony. Things are so wrong - it sounds truely horrible. I downloaded some MIDI files from around the internet and they all play normally. Is is possible Cakewalk has some SysEx events in there that pmidi/rosegarden are interpreting as notes? Cause damn. I didn't write this stuff! -- Ross Vandegrift ross(a)lug.udel.edu "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of Hell." --St. Augustine, De Genesi ad Litteram, Book II, xviii, 37

19 years, 6 months

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Linux-audio-user April 2005