Linux-audio-user September 2004

linux-audio-user@lists.linuxaudio.org

161 participants
177 discussions

by Hans Fugal

I play the organ, and would like to sequence some organ music in rosegarden4. The only problem is that the organ doesn't care how hard you hit the keys (MIDI note velocity), so what would be a fine organ performance sounds really silly because of the different velocities. I don't see a way to filter out note velocity in rosegarden itself, so I think I'd like to use an external filter. I could write one easily enough, but it seems that there might be a generic MIDI filter program out there somewhere, that can go in the patch bay. Does anyone know of one? -- De gustibus non disputandum est.

20 years, 2 months

[linux-audio-user] Re: FC2 2.6.x kernel questions [OT?]

by Matt Barber

Just be wary of 2.6.8* and CD burning. On two of our machines CD burning is broken - on one it completely freezes the box 50% of the time, and on the other, it burns nothing but coasters. Sata support seems more than a little sketchy in 2.6.8* (but we've had no problem with it in 2.6.5 - 2.6.7 fedora/ccrma kernels). you can read this thread: http://ccrma-mail.stanford.edu/pipermail/planetccrma/2004-September/006039.… Matt ->On Sun, 2004-09-26 at 12:50, Barton Bosch wrote: > This may be semi-OT for this list but it does relate somewhat in > regards to burning CDs and eventually using the 2.6 kernels for low > latency audio, etc. > > My production distro is a Planet CCRMA RH 9 installation. I also > have an installation of FC2 that I use for graphics and will > eventually be migrating to. For me, using FC2 and the 2.6 kernels > is edgy enough -- I don't have enough knowledge and experience to be > much use as a beta tester. > > With those caveats in mind, is there a particular 2.6 kernel that > would be better than either 1) the kernel that was shipped with my > FC2 disks, or 2) the most recently released kernel (2.6.8-1.521)? I have released a couple of "experimental" 2.6.8+ kernels that include the voluntary preemption patches by Ingo Molnar. They are getting better all the time. You could try them in your FC2 box by following the instructions here (if you have already installed Planet CCRMA in your FC2 box, of course): http://ccrma-mail.stanford.edu/pipermail/planetccrma/2004-August/005879.html > Where can I find more info about the various kernels and other > updates as they are released? Kernels specific for Planet CCRMA are announced in its mailing list. I guess the place for generic announcements would be the linux kernel mailing list. > Does anyone have any advice as to an > FC2 update strategy other than running `# yum update` every week > or so? For Planet CCRMA that would be apt-get update; apt-get dist-upgrade. I have yum support in my list of things to do but have not had time to implement it yet. <-

20 years, 2 months

[linux-audio-user] RME Hdsp PCMCIA problems

by D. Sen

I am wondering if someone knows how to fix this problem. When I insert the RME hdsp pcmcia card (interfaced to a multiface box) and type 'modprobe snd-hdsp', I get the following on /var/log/messages: Sep 27 20:50:57 localhost kernel: __alloc_pages: 9-order allocation failed (gfp=0x20/0) Sep 27 20:50:57 localhost kernel: __alloc_pages: 9-order allocation failed (gfp=0x21/0) Sep 27 20:50:57 localhost kernel: __alloc_pages: 9-order allocation failed (gfp=0x20/0) Sep 27 20:50:57 localhost kernel: __alloc_pages: 9-order allocation failed (gfp=0x21/0) Sep 27 20:50:57 localhost kernel: RME Hammerfall DSP: no buffers available Sep 27 20:50:57 localhost kernel: RME Hammerfall-DSP: no cards found lspci shows the RME card: 03:00.0 Multimedia audio controller: Xilinx Corporation RME Hammerfall DSP (rev 0a) /etc/pcmcia/config.opts has: include port 0x100-0x4ff, port 0xc00-0xcff include memory 0xc0000-0xfffff include memory 0xa0000000-0xa0ffffff, memory 0x60000000-0x60ffffff include port 0xa00-0xaff exclude irq 4 exclude irq 7 Any help will be much appreciated. Thanks, DS

20 years, 2 months

[linux-audio-user] MIDI on alsa with SBLIve

by Laura Conrad

Timidity is practically unusable with Alsa on my box. In other ways it's only slightly creaky (it's a 3-4 year old AMD 755 box). But there are too many dropouts when I play a multichannel MIDI file for me to use it to proofread my publishing. (Under OSS timidity was fine, but regular readers may remember, my OSS broke when I upgraded to kernel 2.4.26, and I could only get help fixing ALSA, so I'm running ALSA). So I'm trying to set up the hardware MIDI on the SBLive. I'm following the directions at <http://www.tldp.org/HOWTO/MIDI-HOWTO-10.html> and things look normal. When I run "playmidi -a score.midi", it looks like it's playing, but there isn't any sound. (Yes, the speaker is plugged into the right place.) I've looked at the mixer settings and don't see anything obvious to change. So can anyone give me any advice either about how to get the hardware synth to work or how to get Timidity to work better? One part of my score is a quarter note longer than the others, and I need to find out where this happens. -- Laura (mailto:lconrad@laymusic.org , http://www.laymusic.org/ ) (617) 661-8097 fax: (501) 641-5011 233 Broadway, Cambridge, MA 02139

20 years, 2 months

[linux-audio-user] choosing the right sound system

by Miernik

There are so many sound dameons/systems/drivers that I don't know which combination to choose. I need some advice. Here is my setup: I have machine tarnica which is a router mainly, no monitor, no keyboard, but it has (my only) speakers. And I have machine szrenica (my laptop) where I run a jabber client, and I want it to notify me about messages through the speakers connected to tarnica. And on machine tarnica I have a radio card, and I want to record a regular radio program through it's soundcard with cron (I mean something started with cron). And sometimes like to play ogg files through tarnica speakers. What would be best set of daemons/apps/whatever to make all this work without coliding with each other and without the need to kill something to record from the radio and to be able to get jabber sound notifications no matter what else I do with the soundcard (without using killall). -- Miernik _________________________ xmpp:miernik@amessage.info ___________________/__ tel: +48888299997 __/ mailto:miernik@ctnet.pl Protect Europe from a law-disaster. Petition for a Software Patent Free Europe http://www.noepatents.org/index_html?LANG=en

20 years, 2 months

[linux-audio-user] [Announce] jack_snapshot

by Florian Schmidt

Hi, i just scratched an itch i had for some time. A command line based small and simple utility to store/restore jack connection states. Thus i release this initial [hack] version. Maybe someone else finds it useful. http://www.affenbande.org/~tapas/wiki/index.php?jack_snapshot flo

20 years, 2 months

[linux-audio-user] Agnula/Demudi server problems?

by Bill Morgan

I've received no mail from the Demudi list since Wednesday, and the Agnula and Demudi web sites aren't available. Anyone know the story? Thanks, Bill

20 years, 2 months

[linux-audio-user] AC97 Compliant cards that do not resample to 48khz when playing CDs (maybe slightly OT)

by Louis Lam

Hello All, Just out of curiousity, are there any AC97 compliant cards that does not resample everything to 48khz? I've read about this problem on SBLive cards. Lately I've been looking through many older sound cards e.g creative vibra, turtle beach montegro(au8820b2). Most of them have an ac97 compliant codec chip on board. Does it necessarily mean that the presence of this chip conclude that it will try to resample at 48khz? Some cards have another codec on board, e.g. the "Gainward Hollywood@home" (which by the way my system was able to detect and kind-of works, alsamixer and all, but have not use the advanced features yet)has an additional cs4341A-RS codec which handles the last 2 channels that the VIA VT1616(ac97, chan1-6) does not. Given that, how do you: 1. Find out whether the line-in/mic-in can use another codec, will it be: (A)hardwired by design or (B)can it be changed through alsa configuration e.g ".asoundrc" to do that. 2. If it is in the case of (A), then it sounds like to best choice is to record at 48Khz, mix then downsample to 44khz when you want to burn to CD. If this is the case, how will this downsampling affect the quality of the sound? Is there any way to overcome or improve it? Thanks very much, Louis ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

20 years, 2 months

[linux-audio-user] tuning freaks

by Dave Griffiths

Hi all, I'm confused, which of the 3000 scales here is the boring standard western one?: http://www.xs4all.nl/~huygensf/doc/scalesdir.txt I've just added scala (http://www.xs4all.nl/~huygensf/scala/) support to my sequencer, and as much as I like playing in the scale of "Empirical Tibetian Ceremonial", I'd quite like to jam with people :) cheers, dave

20 years, 2 months

[linux-audio-user] Re: es1370 latency and jackd, late driver wakeup

by Louis Lam

Hi All, No reply so far to this post, but its alright... maybe you guys are busy. I was thinking of two possibilities of why this is happening: 1. The Soundcard itself: I'm not sure whether the card can take the polling period of 2 by design. Couldn't find any previous post on this. 2. The Driver. But I've not seen any report on this in the linux-audio-users or alsa list. Can this have impact on the late driver wakeup issue? Thank you guys, my experience in Linux Audio has been pleasant so far. Many Thanks, Louis --- Louis Lam <lshoujun(a)yahoo.com> wrote: > Hello All, > > I have a bunch of old consumer sound cards. SBLive, Vibra128 and ensoniq 1370(es1370). I went > through quite a number of rounds trying out these cards and found that IMHO the es1370 gave me > the > best sound amongst these cards. So i went ahead and try to start jack according to the > capabilities of this card. > > With this card, i find that once i start jackd like this: > > jackd -v -R -d alsa es1370 -r 44100 > > I get lots of xruns immediately. > > Then i tried with the n=4 (ie 4 periods per hardware buffer), i.e "jackd -v -R -d alsa es1370 -n > 4" and I am able to get rid of the xruns. But i see lots of "late driver wakeup: nframes to > process=2048" on the jackd output. What does this message mean? > > For recording into ardour, n=4 and the default frames per period (1024) gives me quite > significant > latency when recording. e.g when I pluck a note on the electric bass i can hear it on the > line-in > monitor first and then from the capture slightly later. > > As a compromise, i set the frames per period to either 64, 128 or 256. But I still get the > "late > driver wakeup" message and occasional xrun when i quit ardour or sometimes even hydrogen. I > notice > that when quitting jackd programs there will sometimes be a few xruns. Is this normal? > > Seems like ideal to start n=2 but this card don't seem to allow me to do that. I could be wrong > but i think for low latency n=2 is ideal. > > If i have saved an ardour project with Tim Goetze's plugin activated in some tracks, ardour may > report that it is too slow or (something like that) when i reload that project file. I suspect > this is to do with some ladspa plugins requiring low latency which my setup is not able to give. > > I know this card is old, but it does give a great sound. I used SBLive previously and don't seem > to have these latency issues (able to start jack with n=2). For owners of this card, any sound > advice to get the most out of it? > > > > Thank You very much, > Louis > > > > ________________________________________________________________________ > Yahoo! Messenger - Communicate instantly..."Ping" > your friends today! Download Messenger Now > http://uk.messenger.yahoo.com/download/index.html > ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html

20 years, 2 months

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Linux-audio-user September 2004