Linux-audio-user March 2005

linux-audio-user@lists.linuxaudio.org

176 participants
229 discussions

[linux-audio-user] IUPUI Student Radio Station should be based on Linux

by ben racher

Hello, I'm starting a student radio station at IUPUI in Indianapolis, Indiana and I want our entire audio infrastructure to be based on Linux. I've got a rough sense of all the apps we need and what apps to setup on which computers, but I thought I'd run the blueprints by you guys to see if you could give me any feedback. Streaming/Web Server: Runs apache and icecast or the icecast mod for Apache. Automation Computer: Runs some sort of playback program, I've been keeping my eyes on LiveSupport http://www.campware.org/ to schedule and automate the station when DJs aren't present. Audio Archive: File Server for our digital library, probably all FLAC files, maybe Ogg, but I think we want FLAC in case we want to burn CDs. And this is the part that I need help on... Production Computer... so I've been tooling around with JACK and Ardour and MusE (not to be confused with MuSE) and other JACK apps and its all really cool and exciting. I never got the sound input to even really work in linux until a couple weeks ago. Yay for the 2.6.8+ kernels. So here are my thoughts on setting up a workstation, and I don't even know if this is possible, but that's why I'm mailing you guys. One department has kindly donated a brand new Dell Poweredge Dual Xeon 2.4 ghz somethin or other. The rest of our computers are from the university junkyard of midgrade PowerPC G4s and Pentium 3s. So the Poweredge is our gem computer out of all the other crappy computers. Is there any way for me to set up the speedy new poweredge as some kind of audio production renderfarm, and get the PPCs and the Pentium 3s to connect to it as production terminals? Cause, although multi-tracking on the G4s and Pentium 3s is possible, doing extensive work with FX plugins is probably out of the question. See what I'm getting at? Also, the Poweredge also has about a 500gb raid system with it, which would be nice to use for storing our audio on and maybe even using as our digital archive as well, but that might be pushing it if we are doing audio production work on it as well? I'd imagine this might be the case, but I don't see why ftping flac files on a local network would be too much of a burden on the raid drive or dual processors. Another reason why it would be nice to be able to connect to a poweredge remotely to do audio work, is that it the poweredge makes about as much noise as a 747. So... its not exactly an audio production friendly unit. So these are my thoughts. Am I crazy... or is there some magical way to make this happen? - Ben Racher bracher(a)iupui.edu

19 years, 8 months

[linux-audio-user] corrupted midi messages using vstserver

by Robert Persson

I have just got vstserver up and running (using the recommended ancient version of wine). The problem I am having is that some midi messages to the plugins get garbled. What happens is that, if I hit two or more keys simultaneously on my midi keyboard, one (and only one) of the notes will continue sounding after the keys have been released. However if I play a slightly broken chord (i.e. where the keydowns are not precisely simultaneous) I don't get the problem. The problem occurs, as far as I can tell, with any VST plugin that produces a sustained note (such as Synth1 or Phibes). However it does not occur with unix-native softsynths such as zynaddsubfx or xsynth. My midi controller is a DX7 and my soundcard is an Audigy2. Is this an old and known problem or is it something particularly to do with my (up-to-date Gentoo) system, or even with my hardware? Is there a solution? Would jack_fst work better? (if I can ever get it to work at all). Many thanks Robert -- Robert Persson "No matter how much ye shake yer peg The last wee drap rins doon yer leg."

19 years, 8 months

[linux-audio-user] hdsp oss emu and sync

by peter plessas

Dear List again, i have another strange problem with my hdsp: OSS emulation is just working when the card is set as clock master. This happens with pd, audacity, some media players,... But jackd is able to connect to the card. Has anyone else had this experience? I need to hook up my hdsp to an existing digital audio setup and can't be the clock master, but want to use pd with OSS emulation due to latency issues. Any help is appreciated, regards, Peter

19 years, 8 months

[linux-audio-user] alsa slight distortion starting at -5dB?

by peter plessas

Hi. Excuse me if this has been discussed already on this list (i don't find a refernce to the thread if there was one). I just discovered some slight distortion with a pure sine tone playing from pd or supercollider via OSS emu or jack thru my HDSP (PCI&Multiface) whenever the output level was more than -5dB (peak value, i think). Alsa drivers are of version 1.0.4 Is this an software issue? Thanks for any hints! Peter

19 years, 8 months

[linux-audio-user] Re: IUPUI Student Radio Station should be based on Linux

by Ben Loftis

Why couldn't you just connect the computers with some form of digital audio I/O (ADAT?). Of course there will be some latency, but since you're dealing with mostly pre-recorded stuff anyway, does it matter? Inject your live inputs at the last stage of the chain and you should be fine.

19 years, 8 months

Re: [linux-audio-user] IUPUI Student Radio Station should be based on Linux, ADAT extension

by Ben Loftis

> From: R Parker <rtp405(a)yahoo.com> > Subject: Re: [linux-audio-user] IUPUI Student Radio Station should be > based on Linux ... > I've got my server in one of those big old Digital > rack cases that's about the size of a fridge. I keep > it in a bathroom on the end of a 50ft keyboard, mouse, > monitor, ADAT, USB, wordclock snake/leash. It's so > noisey and physically imposing that it's difficult to > relax while taking care of business. > Could you explain this setup a bit more? Particularly, how do you extend the ADAT? The only product I'm aware of is the one from Hear Technologies. Is that what you are using, and is it working well for you? -Ben

19 years, 8 months

Re: [linux-audio-user] IUPUI Student Radio Station should be based on Linux

by R Parker

--- ben racher <bracher(a)iupui.edu> wrote: > Hello, > > I'm starting a student radio station at IUPUI in > Indianapolis, Indiana > and I want our entire audio infrastructure to be > based on Linux. I've > got a rough sense of all the apps we need and what > apps to setup on > which computers, but I thought I'd run the > blueprints by you guys to see > if you could give me any feedback. > > Streaming/Web Server: Runs apache and icecast or the > icecast mod for Apache. During the last week or two I've been running icecast/oddcastv3-jack with Ardour and Ardour/JAMin and streaming my DM-24 mixing consol over a DSL line. It has been reliable. I suppose something like this could work in the radio both and would allow a live talkback microphone for the DJ. I suppose there's some non-jack based solution for the live mic. > Automation Computer: Runs some sort of playback > program, I've been > keeping my eyes on LiveSupport > http://www.campware.org/ to schedule and > automate the station when DJs aren't present. > > Audio Archive: File Server for our digital library, > probably all FLAC > files, maybe Ogg, but I think we want FLAC in case > we want to burn CDs. > > And this is the part that I need help on... > > Production Computer... so I've been tooling around > with JACK and Ardour > and MusE (not to be confused with MuSE) and other > JACK apps and its all > really cool and exciting. I never got the sound > input to even really > work in linux until a couple weeks ago. Yay for the > 2.6.8+ kernels. So > here are my thoughts on setting up a workstation, > and I don't even know > if this is possible, but that's why I'm mailing you > guys. One department > has kindly donated a brand new Dell Poweredge Dual > Xeon 2.4 ghz somethin > or other. Sounds like an excellent production machine. I'm running a single AMD 2600+ on a dual capable board. The rest of our computers are from the > university junkyard of > midgrade PowerPC G4s and Pentium 3s. So the > Poweredge is our gem > computer out of all the other crappy computers. Is > there any way for me > to set up the speedy new poweredge as some kind of > audio production > renderfarm, and get the PPCs and the Pentium 3s to > connect to it as > production terminals? Cause, although multi-tracking > on the G4s and > Pentium 3s is possible, doing extensive work with FX > plugins is probably > out of the question. I don't know if rendering effects on a farm is going to work because of latent returns. Or maybe that asumption is completely wrong. There is jack_upd and jack_rtp which can be used to connect the ends of localhost ports together. Then you could experiment with running jack-rack or whatever on one machine, JAMin on another, etc. That would be pretty fun. However, I suspect the production of requirements of most Radio stations to be pretty well handled without assembling this type of system. I'd probably try to inch my way in and maybe you'll discover none of that is needed. Although, JAMin has a pretty hefty appetite and it's suitable for what you're doing. It seems like a perfect candidate for the UDP or RTP stuff. > See what I'm getting at? Also, the Poweredge also > has about a 500gb raid > system with it, which would be nice to use for > storing our audio on and > maybe even using as our digital archive as well, but > that might be > pushing it if we are doing audio production work on > it as well? Actually, that's worth experimenting with too. I have an ICP vortex four channel hardware raid controler. I used to run the studio machine as a dual 2600+. I'd test with rsync over lan, compiling ardour or kernels, printing a dozen tracks in an Ardour session, and mastering in another control room at the same time. Oh, I'd check email and copy files around locally. Basically I'd just start as many tasks as I could. Performance was awesome! I'd > imagine this might be the case, but I don't see why > ftping flac files on > a local network would be too much of a burden on the > raid drive or dual > processors. The raid controler handles all the disk i/o overhead. During disk i/o the CPUs are eating donuts and drinking coffee. Another reason why it would be nice to > be able to connect to > a poweredge remotely to do audio work, is that it > the poweredge makes > about as much noise as a 747. So... its not exactly > an audio production > friendly unit. I've got my server in one of those big old Digital rack cases that's about the size of a fridge. I keep it in a bathroom on the end of a 50ft keyboard, mouse, monitor, ADAT, USB, wordclock snake/leash. It's so noisey and physically imposing that it's difficult to relax while taking care of business. > So these are my thoughts. Am I crazy... or is there > some magical way to > make this happen? I don't think you're crazy. I know you are! Seriously, it sounds like lots of fun and I think you have plenty of very usable gear. ron > - Ben Racher > bracher(a)iupui.edu > __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail

19 years, 8 months

[linux-audio-user] Re: [a-users] Fwd: 2.6.10-1-multimedia and GRUB

by guerrier

grub> find /boot/initrd... did not fing the file though, there is an /initrd.img file in /root directory. How do I confirm if it is associated with the 2.6.10 kernel? I guess I can just add it to menu.lst. My box has three hard drives and one dvd drive. as i stated earlier, the setup is something like this: root is on hdc1 home is on hdc2 winxp/C is on hda1 win98/D is on hdb1 dvd is hdd my menu.lst is has follows: title aGNUla/DeMuDi, kernel 2.6.10-1-multimedia-k7 root (hd2,0) kernel /boot/vmlinuz-2.6.10-1-multimedia-k7 root=/dev/hdc1 ro savedefault boot title aGNUla/DeMuDi, kernel 2.6.10-1-multimedia-k7 (recovery mode) root (hd2,0) kernel /boot/vmlinuz-2.6.10-1-multimedia-k7 root=/dev/hdc1 ro single savedefault boot title aGNUla/DeMuDi, kernel 2.4.25-1-multimedia-k7 root (hd2,0) kernel /boot/vmlinuz-2.4.25-1-multimedia-k7 root=/dev/hdc1 ro initrd /boot/initrd.img-2.4.25-1-multimedia-k7 savedefault boot title aGNUla/DeMuDi, kernel 2.4.25-1-multimedia-k7 (recovery mode) root (hd2,0) kernel /boot/vmlinuz-2.4.25-1-multimedia-k7 root=/dev/hdc1 ro single initrd /boot/initrd.img-2.4.25-1-multimedia-k7 savedefault boot ### END DEBIAN AUTOMAGIC KERNELS LIST # This is a divider, added to separate the menu items below from the Debian # ones. title Other operating systems: root # This entry automatically added by the Debian installer for a non-linux OS # on /dev/hda1 title Windows NT/2000/XP root (hd0,0) savedefault makeactive chainloader +1 # This entry automatically added by the Debian installer for a non-linux OS # on /dev/hdb1 title Windows NT/2000/XP root (hd1,0) savedefault makeactive chainloader +1 thanks, guerrier On Thu, 10 Mar 2005 21:39:13 +0000, Russell L. Harris <rlharris(a)broadcaster.org> wrote: > On 03/10/2005 03:11:22 PM, guerrier wrote: > > Hi, > > I installed the 2.6.10-1-multimedia-k7 kernel via synaptic. and then > > i gave the update-grub coomand. menu.lst was automatically updated; > > this is the new entry: > > > > title aGNUla/DeMuDi, kernel 2.6.10-1-multimedia-k7 > > root (hd2,0) > > kernel /boot/vmlinuz-2.6.10-1-multimedia-k7 root=/dev/hdc1 ro > > savedefault > > boot > > (1) You need to post to this list the entire GRUB menu, so we can see > the menu item which works. > > (2) If I recall correctly, (hd2,0) is the third hard drive in the > system, whereas hdc corresponds to the IDE Secondary Master channel; > check with the GRUB manual (google for it). Many people have a CD-ROM > drive connected as the IDE Primary Slave; this corresponds to hdb. > > (3) Use the GRUB 'find' command to search your system for the missing > initrd file. Again, see the GRUB manual, and don't forget to prefix > the file name with '/': > > grub> find /initrd... > > and note that TAB completion works with file names when using 'find', > which is a great help. > > RLH > >

19 years, 8 months

[linux-audio-user] MIdisport 8x8 simply working

by Christoph Eckert

Hi, how boring: I simply plugged it in and all ports appeared in aconnect. OK, OK, I have installed all necessary software one day before ;-) . Anyway: That's really cool. Thanks to all developers, especially the ALSA team, Takashi Iwai for the famous snd-usb-driver and of course Clemens Ladisch for his work on loading the firmware making usage of midisports a joy. Thanks! One question: The midisport 8x8 can be used as a programmable patchbay in offline use. I used the windows driver panel to set it as desired. But of course I'd like to do this using Linux. In ALSA, there appeared two additional control ports. Are there any sysex commands which can be used to set up the midisport 8x8 patchbay? Best regards ce

19 years, 8 months

[linux-audio-user] Fwd: 2.6.10-1-multimedia and GRUB

by guerrier

Hi, I installed the 2.6.10-1-multimedia-k7 kernel via synaptic. and then i gave the update-grub coomand. menu.lst was automatically updated; this is the new entry: title aGNUla/DeMuDi, kernel 2.6.10-1-multimedia-k7 root (hd2,0) kernel /boot/vmlinuz-2.6.10-1-multimedia-k7 root=/dev/hdc1 ro savedefault boot now when i boot, grub launches, i choose 2.6.10-1-multimedia-k7. it starts to load and then i get this error: VFS: cannot open root device 'hdc1" or unknown-block (0-0) Please append a correct "root=" boot option Kernel Panic - not syncing : VFS: Unable to mount root fs on unknown-block(0-0) I can still boot the 2.4.25 kernel and windowsxp. I also did this, on the advice of Free: # dpkg -i kernel-image-2.6.10-1-multimedia-k7 dpkg: error processing kernel-image-2.6.10-1-multimedia-k7 (--install) cannot access archive: No such file or directory error were encountered while processing: kernel-image-2.6.10-1-multimedia-k7 Gustin inquired about initrd.img-2.6.10-1-multimedia. And I found that there in no entry in menu.lst about it nor is there such a file in /boot directory. Any ideas? guerrier

19 years, 8 months

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Linux-audio-user March 2005