Linux-audio-user

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20662 discussions

[linux-audio-user] Midi/USB "control" board question

by Zachris Trolin

Hello fellow linux audio users :) I'd like to get suggestions of available and working midi control boards: interface with faders, knobs, possible vu meters that's suppose to control computer software. I'm thinking of faders in Ardour, and all kinds of thinkable applications in pure-data and supercollider. I've seen the BFC-2000 looks promising but why an USB interface anyway? How does fader control of Ardour work? In pure data, i can imagine how it would/should work: just sort out the desirable midi message [ctlin] and do something with it. I'm sure there are less expensive options than behringer - any suggestions both cheep and expensive are welcome. -- Zachris Trolin <zachris(a)phreaker.net>

21 years, 1 month

[linux-audio-user] metronome-free MIDI recording

by davidrclark＠earthlink.net

Hi Hans, What a great question. Normally, I do metered recordings and do what you said we shouldn't do, namely edit the tempo track, but I don't use the metronome because it seems to discourage any expression at all (to me anyway). When editing a tempo track, I find it essential to have a quick and easy way to emit dozens of MIDI messages and also to erase and redo them quickly. I don't edit this type of track one step at a time. It's too hard to get it to sound right. For non-metered recordings, I simply don't do any loops at all. The assumption behind this approach is that non-metered recordings should not have identical loops. Once in a while I make an exception and have perhaps two or three very long loops, but these are relatively easy to handle. So at the beginning of any new composition, I ask myself: To meter or not to meter? It's a tough question. Essentially it means: To loop or not to loop? I'd be interested in hearing from others, also, and thanks to those who already did reply. Regards to everyone, Dave.

21 years, 1 month

[linux-audio-user] JACK plugin for ALSA

by Stefan Scheffler

hi :) I recently noticed that there's a JACK plugin for ALSA. Is it actually being used by anyone? Does it work? Because the only thing I could get to work with it was aplay. With everything else I get only noise or nothing at all.

21 years, 1 month

[linux-audio-user] jackd -R freezes on laptop

by jusic＠epoksi.afraid.org

Hi, I have a HP Compaq nx7000 laptop, using Gentoo and vanilla 2.6.8.1 patched with VP (P9) + realtime-lsm patches. (2.6.8-gentoo-r3 + realtime-lsm, same problem..) By running jackd -R -d alsa my box freezes (or stops responding). jackd -d alsa runs ok though. Jack is version 0.98.1 (0.99 also tested), and no NPTL in glibc. Used alsa driver is intel8x0. Where would it be best to start troubleshooting..? Any help would be appreciated. :) --jussi

21 years, 1 month

[linux-audio-user] Re: jackd -R freezes on laptop

by Matthew Barber

Hi, Is your processor hyperthreading (and running an smp kernel)? I remember people having terrible lockups when running jack realtime with hyperthreading cpus and 2.6.8*. It's quite a bit better (very few issues so far) on a dual-proc smp machine, but cdburning freezes it under that kernel. Matt ->Hi, I have a HP Compaq nx7000 laptop, using Gentoo and vanilla 2.6.8.1 patched with VP (P9) + realtime-lsm patches. (2.6.8-gentoo-r3 + realtime-lsm, same problem..) By running jackd -R -d alsa my box freezes (or stops responding). jackd -d alsa runs ok though. Jack is version 0.98.1 (0.99 also tested), and no NPTL in glibc. Used alsa driver is intel8x0. Where would it be best to start troubleshooting..? Any help would be appreciated. :) --jussi<-

21 years, 1 month

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

by Barton Bosch

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)? Where can I find more info about the various kernels and other updates as they are released? Does anyone have any advice as to an FC2 update strategy other than running `# yum update` every week or so? Thanks, Barton

21 years, 1 month

[linux-audio-user] Selecting Streams Based on a Priority Policy ?

by iain＠g7iii.net

Hi All, Does anyone know of an application that will automatically select a stream from a set of streams that I define, depending on (for instance) there is a certain level of data coming from the stream in question ? I'm looking for something that can handle streams from an internet site, rather than just file based. I'm not particularly bothered where it hooks in to the entire Sound Stack - ALSA, arts, etc, I can work that easily enough myself. I've looked at the feature lists of applications such as like Ardour (http://ardour.soureforget.net/), ProTux (http://www.nongnu.org/protux/), and Audacity (http://audacity.sourceforge.net) have, and they don't quite seem to do what I need, and they seem to be file based, rather than internet stream based. It would be nice if it also had a good (and 'proper') scope associated with it, similar to those shown in the screenshots for the aforementioned Ardour, ProTux, Audacity, and Baudline (http://www.baudline.com). However, if anyone knows of a standalone scope of that ilk, that would tap into either arts, or ALSA output, that would also be great. Iain

21 years, 1 month

[linux-audio-user] ???

by Russell Hanaghan

Shhhhhhh! You can hear a pin drop! :) I'm bored and trying to stop smoking! Any one got a "patch" for that??! Someone start a ruckuss! Just kidding..... R~

21 years, 1 month

[linux-audio-user] MIDI filter

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.

21 years, 1 month

[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. <-

21 years, 1 month

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Linux-audio-user