Linux-audio-user September 2007

linux-audio-user@lists.linuxaudio.org

130 participants
158 discussions

Steinway_IMIS2.2 soundfont (no loops fix)

by Roberto Gordo Saez

This is Steinway_IMIS soundfont, version 2.2. ftp://musix.ourproject.org/pub/musix/sf2/Steinway_IMIS2.2 This version fixes the issue with loops. I hope this is the good one and there are no more remaining major bugs. Marcos is a little busy right now, so he asked me to make this fix. He is thinking to make other improvements, so expect more updates soon.

1 year, 5 months

[linux-audio-user] Sub-harmonic generator? (LADSPA or VST)

by Tim Howard

Hello, Does anyone know of a good plugin that will generate subharmonics? I would like to put a little more low frequency "oomph" into my bass track. Preferrable LADSPA, but VST would work, too. Thanks for any help! -TimH

8 years

[ANN] TapStart 0.1 released

by Arnold Krille

Hi all, following a basic rule for open source project "publish early and often" I release the very first (but quite feature-rich) version of TapStart to the public. TapStart is a basic tempo-measurement where you tap some beats and get the (averaged) tempo displayed. But there is more to it: - TapStart also updates the jack-tempo (if a running jack was found during startup) and can even start the jack transport after a defined number of taps. This is implemented for using this thing in jam-sessions to get a click/drum-computer to play in a tempo not known before. - TapStart can also send OSC-messages with the tempo/delay-value as argument to any gives host and path. You can find more information on its page at http://www.arnoldarts.de/drupal/?q=TapStart ofqf (http://www.arnoldarts.de/drupal/?q=node/573) is needed for the osc-part and has to be installed beforehand. The direct-link to the source package is: http://www.arnoldarts.de/drupal/files/downloads/tapstart/tapstart-0.1.tar.gz ofqf: http://www.arnoldarts.de/drupal/files/downloads/ofqf/ofqf-0.1.1.tar.bz2 Have fun, Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a rm / -rf. Or ask your administrator to do so...

16 years

AZR3 at work

by Ken Restivo

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 This is the AZR3 plugin, being played live, using the Elven LV2 host: http://www.youtube.com/watch?v=QNmU_XXQShc The laptop is to the image left, off-camera. There was an actual real Hammond B3 sitting there at this club... and I was given permission to use it, but I had all my other patches set up on my laptop, so I stuck with what I know works. - -ken -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGyLBge8HF+6xeOIcRAmB9AJ4hy3qGx8ofW/wLdJBbqV6c9Iu+HgCeNLNn Yr8Hj+PYAu577EEH8Dk0BAo= =x2gk -----END PGP SIGNATURE-----

16 years, 8 months

how do I get muse to listen to my midi controller?

by Robert Persson

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm tearing my hair out trying to get muse to listen to my midi controller. It plays midi alright because when I enter notes in the piano roll I hear them, but nothing from the keyboard. I'm connecting my audigy2 port #0 (the one that works with other applications) to muse's port #0. I've twiddled with everything I can think of. I'm tearing my hair out because I desperately want to have a sequencer that actually works; rosegarden crashes every 20 minutes and I haven't yet been able to get anything working respectably in wine. So any help would be deeply appreciated! Robert -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG/ZmyyQ3sfGecJBIRAlX4AKDreSuMnEPQZiuVEuGoabKJZFgQdACgr2qK NQibIpwzacpDDo8t/7q9UMA= =9D6U -----END PGP SIGNATURE-----

16 years, 9 months

Realtime, but many xruns when jack is started. Debian Etch

by Nigel Henry

On Debian Etch, using kernel 2.6.18-5-686, which I presume is a realtime one, as when I start jack with qjackctl, and with the realtime box checked, jack doesn't complain. Looking at messages though, shows lots of xruns, although no music apps are being used. I had this problem on Fedora 7. I'd installed the low latency kernel, and associated packages from planetccrma, and again jacks messages were showing lots of xruns. There was an updated pam that came with the kernel download, which left an /etc/security/limits.conf.rpmnew, and Fernando suggested adding the changes to the existing file, as the default setup for jack-audio-connection-kit in the limits.conf file set rtprio at 20. That resolved the problem on Fedora 7. No more messages about xruns. I tried the same few lines, as below, in the limits.conf file in Etch, but to no success, and there are no default priorities for jack there anyway. # limit realtime and memory locking access to users in the group audio # there is no way to say "allow locking all memory", 4G should be enough # #* - rtprio 0 #* - nice 0 # #@audio - rtprio 99 #@audio - nice -10 #@audio - memlock 4000000 # or (default) allow everyone access * - rtprio 99 * - nice -10 * - memlock 4000000 I don't have the realtime-lsm package installed on Etch yet, as I wanted to get opinions from the list first. Thanks for any help/suggestions. Nigel. jackd is version 0.101.1-2 on Etch qjackctl is version 0.2.21-1

16 years, 9 months

Any lyrics please?

by julien lociuro

Hi, Does anybody happen to have written any kind of lyrics I could use for composing a song? I never felt like writing lyrics..but I would like to try composing a song based on lyrics.. so..any guy there? Thanks. Julien.

16 years, 9 months

Source for glitchy drums?

by Ken Restivo

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm starting to enjoy glitchy percussion sounds I'm hearing in a lot of computer music these days, and want to experiment with those. I've asked around about how people are making these sounds, and the answers I get are "Battery", "Redrum", and "Reason". All firmly wedged closed and proprietary. of course. Are there any good free tools for making glitchy drum sounds, which do not require the use of WINE? If the answer to that is "SC/CSound/PD/ChucK", that's fantastic, can anyone point me to some particularly good source code or patches for glitchy drums in those languages that I could start experimenting with? Thanks. - -ken -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFGfDuGe8HF+6xeOIcRAnvoAKCN2WA/VKIuYEvAQHUoOc7vWMZTEQCfZpDX /io2wdQSjVhPudrTM+ZEYYk= =us4I -----END PGP SIGNATURE-----

16 years, 10 months

GNU Denemo chokes a dual core 2 GB server

by Christian Einfeldt

hi My question is fairly long to explain, but simple to summarize: why are we experiencing delays in playing music compositions using GNU Denemo under Edubuntu over a GB network that should be performing better, and what can we do to solve the problem without spending any money? I am a volunteer supporting a public middle school with FOSS. We have a brand new dual core server with 2 GB of RAM whose only purpose in life is to support 24 chubby clients running edubuntu. The thin clients have at least 256 MB of RAM, and most of them have swap space on their hard drive also, although some of them are true thin clients in that the hd has no swap and is basically a vestige. I am told that we have a gigabyte network. The server feeds the signal to the first 18 clients through one GB switch, and then that switch feeds another identical switch with services about 6 more clients. Our problem is that when we use GNU Denemo to play the short little compositions that the students write in class, we can have only one student play his / her composition at a time or the system is choked, meaning that it lags. More specifically, all of the students find that their GNOME desktops are almost completely non-responsive to the mouse. The mouse still moves, but programs launch very slowly for about 5 mins, at which time the choke point is presumably cleared, and then one student can again play his / her composition. It might be possible for, say, 2 students or maybe even three students to play their music; but we don't know where that stress point is. And, in some ways, it doesn't even make sense to slowly add students and have them play music, simply because some people who have heard of this problem in passing furrow their brow and say that we shouldn't be having these problems. We are, of course, going to be trying to get more RAM in the clients; and swap for all of the clients; and we have thought of running GNU Denomo natively on each of the clients by booting them as stand alone work stations. But I am a volunteer, and this inner city school has absolutely no budget for a real tech support person, and all of the teachers already are at work by 6:50 a.m., and they usually stay until 6:30 p.m., and then each of the teachers is expected to be available to field phone calls at home until 8 p.m. All of this might sound kind of drastic, but our students typically come to this school of 290 students under-performing their grade level by 2 grade levels, but leave the school as 8th graders typically performing at or above grade level. Seventy-five (75%) of our students come from households below the federal poverty guidelines. 65% of our students are African American; 17% are Latino; 10% are Asian; and 8% are Caucasian. Despite the life challenges facing our students, last year our students tested in first place (as a student body) based on standardized testing. So this school is succeeding in many ways, but they are really struggling in terms of technology, and that is all because of funding shortfalls. Coincidentally, the students spend no time here on Windows boxes, except for occasionally random Internet browsing on a teacher's Windows box. But that is the exception, because, as you can imagine, the teachers don't want the students accessing their computers. So when the students are not in the lab, they are using PClinuxOS boxes in several of the classrooms to do their Internet research. Overall, this school is making miracles with no funding. I am hoping to move the whole school to FOSS eventually, but of course there is still a lot of work to be done. Thus far, the music teacher is fairly impressed with the ability of students to compose music on GNU Denemo, but she would just like to be able to have all of the students listen to their compositions at the same time. Typically, these compositions are no more than, say, 6 or 10 bars long, just enough to get the students familiar with the basics of scales, rests, note duration, tempo, beat, etc. Just the basics. Thanks in advance for the help. -- Christian Einfeldt, Producer, The Digital Tipping Point<http://archive.org/details/digitaltippingpoint>

16 years, 11 months

How do you make a sound in both speakers at once, but not stereo

by Bearcat M. Sandor

Hey folks, I'm not an audio engineer and i don't even play one on TV. I am a music lover/audiophile who wants to learn about engineering so bear with me here. I understand that when you hear something in the center of your sound stage it's because the sound is equally loud in both channels and in phase. If you hear it spread evenly across the sound stage or even "everywhere in front of you" the sound is equal in both channels and out of phase. I heard a recording the other day where a singer was equally loud in both channels, but she was not center stage. Instead there was one of her in each channel. How is that done? Thank you. Bearcat M. Sandor

16 years, 11 months

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Linux-audio-user September 2007