Linux-audio-user March 2005

linux-audio-user@lists.linuxaudio.org

176 participants
229 discussions

[linux-audio-user] realtime preempt for 2.6.11

by Lee Revell

Apply this tiny patch (yes it's a patch against another patch) to Ingo's latest RT preempt patch to get it to apply against the 2.6.11 release. This was reported on LKML to work fine. Ingo, maybe if you have time you could apply this and post a new patch, just so audio users aren't stuck on 2.6.11-rc4. Lee

20 years

[linux-audio-user] Migration or Interoerability--The Final Frontier

by David Baron

In word processing, it's a piece of cake. I can get any Word, RTF, xls-spreadsheets, presentations into OpenOffice and others. OpenOffice runs fine in both Linux and that other operating system. I can use what I want, where I want. No comments on what and where is best. My choice and this does not detract from the other choices at all. In audio? Now that we have decent applications in Linux and more coming, the question of migrating from other OSes arises. I have loads of Cakewalk (or Cubase or Logic or ...) projects and now I want to use them in Linux, without tediously exporting each track and reimporting. Not all features are in common but most are: Midi tracks, Audio tracks--Cakewalk files have pointers to (reusable) regions in two (mono, stereo) or more wav files. Is there anything around to get such files into Rosegarten or Wired or Muse or Ardour (without the MIDI)?

20 years

[linux-audio-user] realtime parameters ignored at Gentoo startup

by Robert Persson

I am having trouble getting the realtime-lsm module to load with the correct parameters in my Gentoo system. I have gid=18 mlock=1 in my /etc/modules.d/realtime, but they are being ignored. However if I, from a root command prompt, rmmod realtime; modprobe realtime gid=18 mlock=1 then the realtime stuff works as it's supposed to. I can work round this with a startup script, but what is the proper Gentoo way of automatically loading this module with these parameters? Thanks Robert -- Robert Persson "No matter how much ye shake yer peg The last wee drap rins doon yer leg."

20 years

[linux-audio-user] Synthesis Tools: What to use and how to use it?

by Michael Wagner

Hello there, As you might guess, I'm new to the list. Last year I started to develop interest in using the computer to create music - partly because I'm interested in music AND computers: so why not join these two things? - and partly because my band broke up due to the drummer who left town: so why rely on humans, when you can use a machine? ;-) Well, I started reading about recording- and mainly synthesis-techniques. Just recently I started reading the "Computer Music Tutorial", which some of you probably know. It is highly interesting and I think I learned a lot about this topic, so far. Unfortunately, I'm not quite sure about how to use these synthesis techniques in "real life". I mean, I know the basic principles of a few techniques and the basics on waveforms etc. but how can I get the sound I'm looking for out of my softsynth? In terms of software synthesizers, so far, I only looked into Alsa Modular Synth and Zynaddsubfx. I like both of them, but I think, to apply techniques like multiple wavetable synthesis or additive analysis/resynthesis (which sounded particularly interesting to me) and to get a wide range of different sounds, I need to get my hands on more "sophisticated" tools like Pd, CSound or whatever else there is. But actually, I have no idea, which one to choose. The point is, that I really don't want to delve into one of these languages, only to find out, that I should have learned another one... So... what is the tool to use? I want to be able to do the synthesis techniques described in the before mentioned book, it should be controllable in realtime (at least for less resource-intensive patches). With "controllable" I mean, that one should be able to easily change important parameters, e.g. by assigning MIDI-controllers to them and changing these values over time either manually or letting a sequencing tool change them. It would be nice, if output via jack would be supported, so it can be integrated with other Software tools, as well as my hardware synth and drumcomputer. I'd be glad, if someone could help me out about my problem... btw: I hope not to start some kind of religious war... ^_^ thanks in advance, -Michael Wagner

20 years, 1 month

[linux-audio-user] ANNOUNCE kluppe 0.3

by d13b

dear LAUsers! after a long period of inactivity and a month of programming, i am happy to announce version 0.3 of my jackified loopplayer kluppe. you will find a description and a tarball with sources here: http://dieb13.klingt.org/content/projects/kluppe.html recent versions of libsndfile, libjack, libxml2 and libgtk will be required to compile and run kluppe. please let me know if you need help, find bugs or desperately miss features ;) regards d13b

20 years, 1 month

[linux-audio-user] low latency 2.4 help - needed

by Atte André Jensen

Hi I finally decided to see how well a low latency kernel will work on my system. I guess the best performance will be with 2.4.x, right? Anyways, if someone could point me to some detailed information (pref. a easy-to-follow how-to) on how to patch (which patches to get from where) a 2.4 kernel for best possible low latency performance. Thanks in advance. -- peace, love & harmony Atte http://www.atte.dk

20 years, 1 month

[linux-audio-user] Latency problems with MAudio 24/96

by Bill Allen<lau＠ballen.fastmail.fm>

I'm having really bad xrun problems in jack with my MAudio 24/96 card. I can't find any setting that doesn't result in 10's of xruns every few minutes which is obviously unacceptable. The latency doc in the linux audio users page at http://www.djcj.org/LAU/guide/Low_latency-Mini-HOWTO.php3 points out that most soundcards want to have an IRQ of 9, 10 or 11. When I cat /proc/interrupts (below), it appears that my card is at IRQ 19 which as I understand it puts it behind just about everything. Could that be the root of my xrun problem? If so, how can I make the card be on another interrupt. Regards, Bill cat /proc/interrupts CPU0 0: 738208 IO-APIC-edge timer 1: 379 IO-APIC-edge i8042 2: 0 XT-PIC cascade 8: 0 IO-APIC-edge rtc 9: 0 IO-APIC-level acpi 12: 24226 IO-APIC-edge i8042 14: 71993 IO-APIC-edge ide2 15: 20598 IO-APIC-edge ide3 16: 43548 IO-APIC-level ohci1394, nvidia 17: 2157 IO-APIC-level SysKonnect SK-98xx 18: 0 IO-APIC-level libata 19: 177 IO-APIC-level ICE1712 21: 0 IO-APIC-level uhci_hcd, uhci_hcd, uhci_hcd, uhci_hcd, ehci_hcd

20 years, 1 month

Re: [linux-audio-user] Where is crossfade

by R Parker

Hi Noah, Don't sweat it bro, crossfades are working and usable. I think your efforts will pay. There's a couple crossfade models; A, short fades at start of overlap and B, span entire region overlap. These crossfade interface is in Options, and under the Layers and Fades tab. I suspect you will want to use option A. With A if there's an overlap you would Right mouse button over the region overlap. This will present you with a context menu. At the top of the menu will be something to the affect of "regionname.A -> regionname.B." The submenu for this has three options; Unmute, Edit and Full. You will probably want to "Unmute" and then follow that choice with "Edit." At this point I think things will be clear enough for you to understand the options and get what you need. ron --- Noah Roberts <roberts.noah(a)gmail.com> wrote: > Ok, I have seen crossfade show up in the menu a few > times but it seems > to go away and never come back if you alter either > track. I want to > merge two sections of the original tracks but I > can't get the damn > crossfade menu item to appear. I have no idea where > it went. I have > two tracks that overlap slightly and I would really > like to crossfade > now. How do I make ardour give me that option?!?! > > Kinda frustrated. Been working on this for a long > time and now it > looks like all was for nothing. > > Thanks. > __________________________________ Celebrate Yahoo!'s 10th Birthday! Yahoo! Netrospective: 100 Moments of the Web http://birthday.yahoo.com/netrospective/

20 years, 1 month

[linux-audio-user] Where is crossfade

by Noah Roberts

Ok, I have seen crossfade show up in the menu a few times but it seems to go away and never come back if you alter either track. I want to merge two sections of the original tracks but I can't get the damn crossfade menu item to appear. I have no idea where it went. I have two tracks that overlap slightly and I would really like to crossfade now. How do I make ardour give me that option?!?! Kinda frustrated. Been working on this for a long time and now it looks like all was for nothing. Thanks.

20 years, 1 month

[linux-audio-user] Volume settings aren't saved on Gentoo system

by Robert Persson

I am having some very basic problems with my alsa setup on my new Gentoo installation: 1. I can't make my changes to the mixer settings stick and so I have to change them manually every time I boot up. This is despite having the line 'SAVE_ON_STOP="yes"' as the only uncommented line in /etc/conf.d/alsasound. 2. I can't seem to make my Audigy2 soundcard 0 and my on-board audio soundcard 1, despite having options snd cards_limit=2 options snd_emu10k1 index=0 options snd_intel8x0 index=1 in my /etc/modules.d/alsa (which is automatically used to generate /etc/modules.conf). #2 is just a minor annoyance, but #1 really needs sorting out and any help would be appreciated. Many thanks Robert -- Robert Persson "No matter how much ye shake yer peg The last wee drap rins doon yer leg."

20 years, 1 month

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Linux-audio-user March 2005