[08:30] <Harry_> hello
[10:23] <studio-user628> hi. my instalation just finished, but i do have an error. input/output error during write on /dev/sda
[10:24] <studio-user628> what could it be?
[10:24] <studio-user628> thanks
[10:24] <studio-user628> should boot from ahci mode?
[10:54] <barbis_> hello! I have a small problem with a usb guitar cable. The device is recognized by the system and IT WORKS in audacity without jack. But when i  open jack there's no way to make that device work. i changed in the preferences the input (from default to the usb generic debice) but still no sound. any idea?
[11:05] <ailo> barbis_: If you can make it work with pulseaudio, it will work with jack. Everything else works normally? Desktop sound (from the browser, etc..)
[11:11] <barbis_> Yes, everything works fine, desktop sound and the analog mic
[11:14] <barbis_> ailo: well, everything WAS working fine... I need a reboot.
[11:25] <ailo> barbis: If you just want to restart desktop sound, you can do this in a terminal: killall pulseaudio
[11:25] <ailo> Should help logging out and in again also
[11:26] <ailo> barbis: Which is the analog mic? An internal mic with a laptop?
[11:27] <ailo> If jack starts, but doesn't want to quit, this is because of a known bug. To kill jack, you must do: killall -9 jackdbus
[11:28] <ailo> barbis: What drivers were you using with Audacity when you used your usb device?
[11:29] <barbis> ailo: thank you for the advice!
[11:29] <barbis> the analog mic is an external jack audio
[11:30] <barbis> sorry, how can i know which driver i'm using?
[11:37] <ailo> barbis: Nevermind. What happens when you start jack?
[11:37] <ailo> You say no sound, but it does start?
[11:39] <barbis> yeah it start
[11:40] <ailo> barbis: Ok, so what application are you using to test sound?
[11:40] <barbis> well, when i open it i have an error "Cannot connect to server socket err = No such file or directory; Cannot connect to server socket; jack server is not running or cannot be started"
[11:40] <barbis> ailo: but when i click start it start
[11:41] <barbis> ailo: ardour and audacity
[11:41] <ailo> barbis: What usb device is it, btw?
[11:42] <barbis> ailo: is a guitar usb cable, big jack from one side, usb the other. is a IMG stageline
[11:44] <ailo> barbis: So, you tried to record to Ardour, but nothing was captured?
[11:44] <barbis> ailo: yes
[11:45] <barbis> ailo: but wait, i just checked the message log from jack and there is some errors
[11:46] <ailo> barbis: If jack is running, it is working
[11:46] <barbis> ailo: Mon Jun 11 13:38:55 2012: [1m[31mERROR: Cannot lock down 82246176 byte memory area (Cannot allocate memory)[0m
[11:46] <ailo> barbis: I see. You are not running Ubuntu Studio
[11:46] <ailo> This means you don't have realtime privilege
[11:46] <barbis> ailo: Mon Jun 11 13:38:55 2012: [1m[31mERROR: Cannot use real-time scheduling (RR/10)(1: Operation not permitted)[0m
[11:46] <barbis> Mon Jun 11 13:38:55 2012: [1m[31mERROR: AcquireSelfRealTime error[0m
[11:46] <barbis> ailo: i am, just installed two days ago
[11:47] <barbis> ubuntu studio 12.04
[11:47] <ailo> barbis: Ok, so did you add a new user?
[11:48] <barbis> ailo: just installed as usual and create my own account$
[11:48] <ailo> But this is not related to you not getting sound though
[11:48] <ailo> It just means you cannot run jack applications at low latencies, because realtime privilege is not set up correctly
[11:49] <barbis> ailo, ah no, you're right, i had already installed before and now i just reinstalled the os but i used my old /home
[11:49] <ailo> barbis: That should not make any difference. Strange
[11:50] <ailo> To achieve realtime privilege, you must make sure you are member of audio group
[11:50] <ailo> To do that: sudo usermod -a -G audio $USER
[11:51] <ailo> Also, you need the file /etc/security/limits.d/audio.conf
[11:51] <ailo> In that file there should be two lines uncommented:
[11:51] <ailo> @audio   -  rtprio     95
[11:51] <ailo> @audio   -  memlock    unlimited
[11:52] <ailo> If you edit /etc/security/limits.conf you might need to restart. Not sure. At least log out and login again, when adding yourself to audio group
[11:52] <ailo> Ah, sorry
[11:53] <ailo> Not /etc/security/limits.conf (if you have lines with "@audio.." there remove them
[11:53] <ailo> /etc/security/limits.d/audio.conf, as mentioned before
[11:54] <ailo> This will only solve the realtime privilege problem
[11:54] <barbis> euh, in fact i have just one file /etc/security/limits.d/audio.conf.disabled
[11:54] <ailo> barbis: You'll need to rename it. Remove .disabled
[11:54] <barbis> ah ok perfect
[11:55] <ailo> barbis: Also, make sure the lines are uncommented
[11:55] <ailo> barbis: Your device is a generic usb 1.1 device, which means it doesn't need drivers to any OS
[11:55] <ailo> So, it should work, no problem
[11:56] <ailo> You just need to get more comfortable with the programs perhaps
[11:56] <barbis> ailo: just that commented #@audio   -  nice      -19
[11:56] <ailo> barbis: You can leave that commented. It won't help anyway
[11:56] <barbis> the others two are uncommented
[11:56] <barbis> ok
[11:56] <ailo> ok, good. Now restart. realtime should work after that
[11:57] <barbis> thank you
[12:01] <barbis> ailo: ok there's not anymore those errors
[12:03] <barbis> ailo: but still the usb device is not working
[12:03] <barbis> ailo: as you said
[12:08] <ailo> barbis: If it works with audacity, it will work with jack and Ardour. It's just a matter of finding the correct configs
[12:08] <ailo> Have you adjusted samplerate?
[12:08] <ailo> I don't think it supports more than 44.1 kHz
[12:09] <barbis> its at 44,1
[12:10] <barbis> btw, in the input device menu i have hw:1 generic USB audio device and hw:1,0 USB device
[12:10] <barbis> which one is supposed to be the right one?
[12:10] <ailo> hw:1 is usually the one you choose, but you can try both
[12:10] <ailo> It should work with hw:1
[12:12] <ailo> if a device has digital outs, you will se both hw:1.0 and hw:1.1 for that device.
[12:12] <ailo> So, in this case, I don't believe it will matter. Especially since your device is usb 1.1 compliant
[12:12] <barbis> ah, in the jack message log there's no mention about hw:1 just control device hw:0
[12:13] <barbis> ailo: (thank for the expanation)
[12:14] <ailo> barbis: Maybe you can only use the output? Try setting output only
[12:14] <ailo> I mean, the other way around of course
[12:14] <ailo> "capture only"
[12:15] <ailo> You change: Audio - Duplex / Audio - Capture only
[12:16] <ailo> Again, I don't think this should matter
[12:17] <barbis> damn i knew that i was loosing myself in a glass of water (literally translated from italian, don't know if make sense in english). i changed the interface to hw:1
[12:17] <barbis> and it works
[12:17] <ailo> :)
[12:18] <barbis> but then it will not be possible to use the internal card for output?
[12:18] <ailo> barbis: Everytime you reboot, the order of the cards will change
[12:19] <ailo> barbis: I will try now, to see if it works myself. Never tried that before :P
[12:19] <ailo> It seems to work
[12:21] <ailo> It is even possible to use two devices at once, but usually you would need to sync them to avoid clicks
[12:21] <ailo> And you need a special config file for that
[12:23] <barbis> ok, i have really no idea what happened but now it works, just selected input hw:1 and output hw:0
[12:23] <barbis> i'm able to record and listen with two devices
[12:26] <ailo> Oh, to clarify, When I said two devices at once, I meant for both output and input (and then you need to sync with spdif and have a special config). I haven't ever tried using one for input and another for output
[12:26] <ailo> Could be there are problems at lower latencies perhaps
[12:26] <ailo> No idea
[12:28] <ailo> barbis: I seem to get an occasional xrun using 1024 frames/period, so not very good
[12:28] <ailo> but this is a generic kernel also :(
[12:30] <barbis> ah ok, no here i'm trying to just plug the guitar with usb and go out with the build in soundcard
[12:31] <barbis> it's time to get a proper external soundcard (i'm telling that to myself since forever...)
[12:32] <barbis> anyway, when jack crash i'm not able to restar it again, that's normal? (as you told me before i restart pulseaudio and kill jack)
[12:33] <barbis> is just opening crashed
[12:33] <ailo> barbis: You only need to kill jackdbus
[12:34] <ailo> barbis: Also, there's a pulsaudio + jack bridge on by default. If you have problems, you may want to uninstall pulseaudio-module-jack
[12:34] <ailo> If you don't need jackdbus (not sure exactly when you might need it), disable "Enable D-Bus Support" in qjackctl -> Setup -> Misc
[12:34] <ailo> This will also disable the bridge
[12:35] <ailo> Without jackdbus, you should have no errors
[12:35] <ailo> After uninstalling pulseaudio-module-jack, you will at least need to restart pulseaudio for changes to take effect (I think)
[12:36] <ailo> ladish will probably need jackdbus
[12:37] <ailo> Unfortunately, there's no easy way to change these settings right now :(. Hopefully we will have a tool for that soon
[12:48] <barbis> i have no idea what jackdbus is, but it keep giving me problems, so i will disable it as you suggest
[12:49] <barbis> meantime i just messed everything up once again  :(
[13:07] <barbis> bah, now nothing is working again, even skype :(,
[13:09] <barbis> ailo: well, now it's time to practice, but thank you very much for your help and support, really appreciated and, even if it was for a short time, i saw things working :-)
[13:09] <barbis> ailo: have a nice day (evening, don't know where you are :-) ) and thx again!
[13:43] <aubedoree> Hello
[13:44] <ailo> hi aubedoree
[13:45] <ailo> New to Ubuntu Studio?
[13:45] <aubedoree> Not even new
[13:45] <aubedoree> :D
[13:45] <aubedoree> I'm a basic ubuntu user
[13:46] <aubedoree> I wanted to install linux-lowlatency
[13:46] <aubedoree> it messed up my system
[13:46] <ailo> multiple OS's?
[13:46] <aubedoree> now I'm still a ubuntu user, and I'm wondering how to make the switch to ubuntustudio
[13:46] <aubedoree> No.
[13:47] <aubedoree> fglrx issue. Possibly
[13:47] <aubedoree> No idea really
[13:47] <ailo> linux-lowlatency is essentially linux-generic, but with a couple of different configgs
[13:47] <aubedoree> I just reinstalled the entire system (which is still messed up, but LESS messed up)
[13:48] <aubedoree> Question : do I simply apt-get install ubuntustudio from my ubuntu distro ?
[13:48] <aubedoree> in order to get something that works ?
[13:49] <ailo> You can either install Ubuntu Studio from the live DVD, or just add ubuntustudio-* packages, like ubuntustudio-audio, if you only want audio related
[13:49] <ailo> For audio you'll still need to set up realtime privilege
[13:49] <ailo> In order to get better performance with jack
[13:50] <aubedoree> So if I follow you, I have to do the following :
[13:50] <aubedoree> 1- install linux-rt kernel
[13:50] <aubedoree> 2- update sources.list in order to have ubuntustudio packages
[13:50] <holstein> aubedoree: there is no linux-rt
[13:50] <holstein> there is only lowlatency, and you dont *ned* it
[13:50] <holstein> need*
[13:51] <holstein> aubedoree: the ubuntustudio packages are in the default repos, so you dont update sources.list
[13:51] <aubedoree> ailo holstein "realtime privilege" : how to set it up ?
[13:51] <holstein> aubedoree: you just literally search ubuntustudio, and install what you like
[13:51] <holstein> OR, just install the specifice software you want
[13:52] <aubedoree> hmm.
[13:52] <holstein> aubedoree: i suggest you just start using the software, and if you run into issues, we can troubleshoot for "realtime privilages"
[13:52] <aubedoree> OK
[13:52] <ailo> aubedoree: first, install jackd. And choose "yes" for realtime privilege
[13:52] <aubedoree> I'll clean up my install
[13:53] <aubedoree> and then I'll follow with jackd
[13:53] <ailo> aubedoree: Second, add yourself to audio group
[13:53] <ailo> sudo usermod -a -G audio $USER
[13:53] <holstein> if you dont need JACK, dont install/use it aubedoree
[13:53] <ailo> holstein: He's into trying out Ubuntu Studio
[13:54] <ailo> If he doesn't need jack, he sure won't need lowlatency either
[13:54] <holstein> i would "try it out" with the live CD
[13:54] <aubedoree> I've tried the liveCD out some time ago
[13:54] <aubedoree> I've got a firebox
[13:54] <holstein> aubedoree: nah.. we didnt have one some time ago
[13:54] <holstein> aubedoree: i have a presonus firepod
[13:54] <aubedoree> .. Then I don't know what I tried out ;)
[13:55] <aubedoree> And I ultimately think I'll have to use it eventually
[13:55] <holstein> aubedoree: maybe 64studio?... doesnt matter... i still say thats the easiest way to test and try the software
[13:55] <aubedoree> I'm just a beginner audiowise
[13:56] <aubedoree> But I intend to learn
[13:56] <aubedoree> Since I want to ultimately record and mix my own audio
[13:57] <aubedoree> using Open Source software
[13:57] <aubedoree> Presonus hardware : well-supported ?
[13:57] <holstein> aubedoree: i think you have the proper idea :)
[13:58] <holstein> aubedoree: trying to replace software for free is a bad idea... these tools are professional quality tools that are not meant to emulate other tools
[13:58] <holstein> i think that is an issue some folks have
[13:58] <holstein> aubedoree: the firepod works OOTB
[13:58] <holstein> aubedoree: cant say about the firebox
[13:59] <aubedoree> holstein : I don't use non open source software unless I have no other choice
[13:59] <holstein> aubedoree: you might be interested in the #opensourcemusicians community as well
[14:00] <aubedoree> And I've stopped using non open source software with warty warthog
[14:00] <holstein> looks like it'll work http://www.ffado.org/?q=node/33
[14:01] <aubedoree> OK thx
[14:01] <aubedoree> I'll have to learn how to use jackd though
[14:01] <aubedoree> :D
[14:02] <aubedoree> I'll figure it out eventually
[14:02] <holstein> aubedoree: i suggest starting JACK as root to troubleshoot
[14:02] <aubedoree> thanks for your help
[14:02] <holstein> gksudo qjackctl
[14:02] <holstein> if you can get the presonus working with the ffado driver in there as root, then you know any other issues are permissions issues
[14:03] <aubedoree> hmm
[14:04] <holstein> i dont bother with pulse and JACK.. i plan on removing that fro my 12.04 install when i get around to upgrading
[14:04] <aubedoree> pulseaudio seeems to be more trouble than anything else
[14:05] <aubedoree> is it possible to have a working distro without pulse ?
[14:05] <holstein> eh... i have alsa only and pulse systems
[14:05] <holstein> i have issues both places
[14:05] <aubedoree> doing everything with jack ?
[14:05] <holstein> depends on what you consider "everything"
[14:05] <holstein> JACK is open... *everyone* who want can write in JACK support... but they dont
[14:06] <holstein> i personally dont want flash and normal daily computing audio tasks done on my studio machine
[14:06] <holstein> if you have that one machine to kind of do everything, then you probably want pulse through JACK, which is what you get by default with 12.04
[14:07] <ailo> aubedoree: I've made a page about audio on 12.04 here https://help.ubuntu.com/community/UbuntuStudio/ProAudioIntro/1204
[14:07] <ailo> Not the best writing, but hopefully it will give you some clues
[14:07] <holstein> ailo: very nice!
[14:07] <ailo> It's all in there. PA, alsa, jack
[14:08] <ailo> holstein: It's a part of the community docs, under "Ubuntu Studio User Guide" and "Introduction to Audio"
[14:09] <aubedoree> I bookmarked the link
[14:09] <ailo> If you want desktop sound with a firewire device currently, you'll need the PA -> jack bridge
[14:09] <aubedoree> hmm
[14:09] <ailo> It works pretty well, unless you need really low latencies
[14:09] <holstein> most folks dont
[14:10] <ailo> It's all configured by default, so all you need to do is install the packages
[14:10] <holstein> most folks just think they do, and spend hours/days/weeks getting low latency ;)
[14:10] <ailo> Also, realtime privilege
[14:10] <holstein> i did... i can get under 1ms... but i rarely use that setting
[14:10] <aubedoree> How can you know if you need low latency or realtime ?
[14:10] <holstein> took months til i just calmed down and made some music
[14:11] <ailo> aubedoree: If you need to play a live software instrument, like a synth, you'll need to hear what you are playing
[14:11] <ailo> aubedoree: So, you need low latency
[14:11] <aubedoree> I'll need to play a live analogic instrument (a violin).
[14:11] <ailo> Otherwise there will be a pause between the time you hit the key and you hear the sound
[14:11] <ailo> aubedoree: For a violin you won't need low latency
[14:12] <aubedoree> ... because ?
[14:13] <aubedoree> I will need unlagged feedback, won't I ?
[14:13] <ailo> aubedoree: When you record, you hear the violin directly. It doesn't need to pass through the computer
[14:13] <aubedoree> Hmm.
[14:13] <aubedoree> OK I get it
[14:13] <ailo> All you need is to hear the playback from the computer (drum machines or whatever)
[14:13] <holstein> you can monitor from the hardware before the computer too
[14:13] <ailo> Yeah, using a mixer or a preamp or whatever
[14:14] <ailo> aubedoree: This is the community wiki https://help.ubuntu.com/community/UbuntuStudio
[14:14] <holstein> the firebox actually just does it
[14:14] <aubedoree> I'm not sure I'd use drums machines in combination with a violin. Could be an idea though
[14:14] <holstein> you can mix whats "live" and whats coming back from the computer
[14:14] <holstein> you can disable monitoring the signal you are recording from the computer
[14:15] <holstein> you'll have the tracks you have already made, and the violin live
[14:15] <ailo> aubedoree: Here's a chapter on realtime support. That is the only chapter you *need* to worry about. It is required for low latency, and is probably useful for higher latencies as well
[14:15] <ailo> https://help.ubuntu.com/community/UbuntuStudioPreparation#Real-Time_Support
[14:15] <holstein> the latency gets compensated... and for all intents and purposes, your latency can be a second
[14:15] <aubedoree> I think I'll take it slow and begin with a clean ubuntustudio distro.
[14:16] <aubedoree> And go from there, reading the documentation, there seems to be a lot to digest
[14:16] <ailo> aubedoree: It would make things easier, since everything is already set up. All you need is to learn how to use the programs
[14:16] <aubedoree> ailo : it's probably better
[14:17] <aubedoree> I'll have an excuse to buy a new machine, that way :D
[14:18] <holstein> i can do all i need with audio on a p4 with a gig of ram.. but buy what you want :)
[14:19] <aubedoree> You never can have enough machines anyway
[14:19] <aubedoree> And I prefer dedicated systems
[14:19] <aubedoree> in general
[14:19] <holstein> yup... i think that is the best as well
[14:19] <aubedoree> Ok thanks for your help !
[14:20] <holstein> aubedoree: enjoy!
[14:20] <aubedoree> Bye, going back to work :)
[14:20] <aubedoree> thank you holstein & ailo
[14:20] <ailo> aubedoree: Have a nice day
[14:20] <aubedoree> you too