[06:46] is it right that my laptop fan is running at a higher rpm in low latency kernel? [07:11] cbx33: Could be. [07:11] i guess cos the higher "load" on the system to be low latency [07:11] :) [07:11] It uses a bit more cpu, but I don't think it's too much [07:12] We haven't done any tests on that yet [07:12] ahh [07:12] Don't know if anyone has [07:12] ailo-w, thanks [07:12] just comparing to me standard build [07:12] I bought an AudioBox USB yesterday and was playing with it with Ardour 3 Beta [07:12] suffered from a few xruns [07:13] and actually a rather unstable system - thought it may have been because my frames/period was too low [07:13] cbx33: At which frames/period? And are you using the pulseaudio bridge? [07:14] i was using JACK with 128 [07:14] Ubuntu Studio is set to use the bridge by default [07:14] ahh maybe that's it [07:14] Also, some usb devices don't work well at lower latencies [07:14] ok [07:14] cbx33: How is the performance with your internal card, in comparison? [07:14] I installed xubuntu and then a load of packages - if I install ubuntu-studio package will it set that up for me? [07:14] cbx33: To remove the PA bridge, uninstall pulseaudio-module-jack, and restart pulseaudio [07:15] ailo, in all honesty I never did any real recording with Ardour on 128 [07:15] I used 128 for linux sampler [07:15] as I found the keyboard too delayed with 20ms [07:15] cbx33: Usually, with the low latency kernel, you can get a pretty stable performance at 64, depending on your HW [07:15] it's an i5 - laptop [07:15] integrated grahpics [07:16] Never tried one of those yet [07:16] unfortunately [07:16] :) [07:16] it's ok [07:16] a few little quirks here and there [07:16] so what does the bridge do ? [07:17] It makes PA connect to jack, when you start jack [07:17] Or, rather, jackdbus [07:17] cbx33: Did you set up realtime privilege? [07:17] cbx33: Installing packages is not enough [07:17] i get the flashing RT - so i think it's working [07:18] cbx33: See the log [07:18] cbx33: To get realtime privilege, say yes when asked while installing jackd [07:19] The file should be /etc/security/limits.d/audio.conf and not audio.conf.disabled [07:19] lemme check [07:19] cbx33: Also, add yourself to audio group [07:19] sudo usermod -a -G audio $USER [07:19] @audio - rtprio 95 [07:19] @audio - memlock unlimited [07:19] #@audio - nice -19 [07:19] If you didnt' do those things, you don't have realtime privilege [07:19] i am in the audio group [07:19] Ok, so you're all set up [07:20] JACK server starting in realtime mode with priority 10 [07:20] cbx33: I'd remove the bridge. Do testing with both the internal card and the usb for comparison [07:20] ok [07:21] so what does the bridge affect [07:21] does it just make JACK do more work than it has to? [07:21] It usually gives you an occasional xrun at lower latencies [07:21] I don't know why [07:22] Maybe it just needs to be improved [07:22] ok [07:23] The following packages will be REMOVED [07:23] pulseaudio-module-jack ubuntustudio-recording [07:23] ailo-w, that implies that the pulse module is included with ubuntustudio-recording right? [07:25] cbx33: Seems like it. Removing the meta will not affect anything [07:25] no i know :) [07:29] will try that later [07:29] it's removed [07:30] Going to try performance on this old P4 just for fun. [07:30] hehehe [07:30] the audiobox has a resolution of 24bit [07:30] what does jack support? [07:36] I'm on a lxde desktop right now actually. Installed ubuntu onto a usb stick [07:38] Pretty stable at 64 frames/period [07:38] Using the internal card [07:38] no xruns yet [07:43] cbx33: If you find that the usb device is less stable than your internal, try using the rtirq script to your benefit [07:43] The package is called rtirq-init, and I believe it comes with the kernel [07:43] -lowlatency that is [07:43] But, you might need to adjust it [07:44] wow [07:44] ok thanks [07:44] lemme copy that [07:45] be back later [07:45] cbx33: To see how your realtime prios are, use the command: ps -eo comm,rtprio [07:50] I do get an occasional xrun. [07:51] Even without the bridge. But this device isn't exactly pro audio === wook is now known as Guest66157 [10:58] hi there! anyone willing to give out some info please?? [11:03] akhila: Just ask [11:04] akhila: Usually if one has a question, you just ask and wait for someone to respond. Takes a while sometimes [11:06] okay. thanks. [11:06] Testing Ubuntu Studio. I'm actually new to it. Opened Orage. and then Globaltime [11:07] The window has two buttons which appear very much merged. [11:07] and it actually shows anly local time. [11:07] is it how it should be?? [11:07] Running studios on VirtualBox [11:12] akhila: I guess so [11:12] akhila: Most of the desktop related stuff come directly from Xubuntu/XFCE [11:13] So, you might find more detailed answers on their channel [11:13] channels* [11:13] okay. thank you :) [11:14] akhila: If you rather have multimedia type of questions, this is a good place for that [11:18] Actually I was directed to you to ask these very questions. Anyways, thank you for the information and your valuable time. [13:29] hi all [13:29] Hi chimbo, how can we help ya? === chimbo is now known as cbx33 [13:30] sorry wrong nick [13:30] Oh OK [13:30] ailo helped me a bit earlier [13:30] had a question regarding the rt irq stuff for USB [13:30] Uh huh [13:30] ailo: Help cbx33:) [13:30] haha [13:30] also just popped in to say hi [13:31] I bought a Presonus AudioBox and used it on JACK last night [13:31] worked very well indeed [13:31] tried to use it with it's own DAW on windows 7 early this morning.....and the whole thing just froze [13:31] makes me laugh [13:31] LOL [13:31] no exageration [13:32] i had a few issues last night but I think that's because I was being cheeky with my frames/period [13:32] could be the settings... i find linux can be more graceful at failing [13:32] i had a few xruns [13:33] then i loaded audacity and got a never ending stream of xruns and everything just froze [13:33] ardour didn't seem to like it much [13:33] but then I am running SVN ardour3 [13:33] so i guess I should expect oddities [13:33] audacity really doesnt work well with JACK [13:33] no [13:33] I won't be trying that again [13:33] its not something anyone really works at making stable [13:34] cbx33: ardour aught to be quite reliable. [13:34] the presonus is nice - i hooked up my guitar and used guitarix [13:34] cbx33: How's your performance now? And did you compare with your internal yet? [13:34] ailo-w: even the SVN build? [13:34] ailo-w: not yet, in the UK...lunch hour :) [13:34] will have to wait till i get home [13:34] cbx33: At least when it comes to the jack part of it. The same guy behind ardour and jack [13:35] ailo-w: of course [13:35] I get a strange race condition too when using positional in ardour [13:35] the first time i click on a position in ardour....both Jack and Ardour try to play catch up and get it wrong [13:35] the second time i click it's ok [13:36] so i just double click on the timeline now :) [13:36] That sounds terrible [13:36] maybe that was frame related too....but i seem to recall i tried it last night and it was still bad even on a higher frame seeting [13:36] cbx33: You should report it [13:36] well the playhead moved...but you got zero audio [13:36] then o nthe second click, the audio returned [13:37] gonna try the low latency kernel tonight.....except I don't like that my fan speed is higher with it [13:38] cbx33: One thing you could try is to lock the cpu to a lower speed [13:38] cbx33: You might not need it to be at full [13:38] true [13:38] this was when it was idling though [13:38] maybe it's because the lowlatency kernel is further behind [13:40] ie...powermanagement may have changed [13:40] maybe i should install 64bit ubuntu [13:41] time to go home.. [13:53] cbx33, I haven't had that experience. The fan doesn't run that much for me till the cpu speed ramps up to full [13:55] hmmm [13:56] mine is definitely faster on low-latency [13:56] which bugs me [13:56] It could be that mine is a low power atom. [13:56] is preempt still around? [13:56] ahh [13:56] yeh mine is an i5 [13:56] i5 here [13:56] gee you can do recording on an atom? [13:57] thinking of getting an SSD for this bad boy [13:57] cbx33: Why not? [13:57] yes, even at half speed (800 Mhz) [13:58] wow [13:58] len-dt: that's awesome [13:58] I think my frames/period was too low [13:59] 128 [13:59] or maybe I just have too much crap installed on my system :) [13:59] gonna take a look at processes tonight and see what I can clean up [14:00] 128 for live use (guitarix for example) is about the highest you want to go. For recording 1024 is pretty normal [14:00] yeh that's what I thought [14:00] guitarix is nice! [14:00] i was playing my Ibanez through it last night [14:01] very impressed [14:01] my problem is with linux sampler - playing piano, I really need 128, as higher than that, I can feel the latency - and sometimes you want to "play" with the full multitrack [14:01] cbx33, I like it too. I haven't had a real guitar amp in ages. [14:01] if that makes sense [14:01] it's a shame yo ucan't change them realtime [14:02] len-dt: care to share any good setups - would be greatly appreciated sometime [14:03] That makes sense. I would try using an external sound module (in my case whatever is in the synth I use for a KB) to get the midi into the computer when recording. [14:03] then just use the sampler for play back. [14:04] len-dt: yeh I could do that [14:04] I have a Korg X5D [14:04] I could also just use a GM midi [14:04] * len-dt uses an old dx7 [14:04] and as you say pipe it through linux sampler for playback [14:04] but now I use an Alesis QX49 [14:05] anyone want an RM1x? [14:05] Yamaha [14:05] :) [14:05] I'm not really a KB player... so the model names don't mean anything to me. [14:05] Yamaha RM1x is a dance music thingy [14:05] I can't play piano, but can add string pad kinds of things [14:06] bought it because I wanted to do midi loop programming [14:06] but never really used it much [14:06] found it listed o na site as vintage the other day [14:06] That happens [14:06] my DX7 is from 1982 or so [14:07] I like the feel of it [14:07] cbx33: You can change latency on the fly with ardour, or any other application with jack control that allows it [14:07] qjackctl doesn't do that [14:08] ailo you got home quick [14:08] That's quick ailo really [14:09] It's not far. I have a fast bike :) [14:09] motorbike? [14:10] No, a racer bike. I don't know the right term. For regular roads [14:10] Yay [14:10] A bicycle anyway [14:10] yeh i cycle too [14:10] about 3.6 miles each way [14:12] http://www.youtube.com/watch?v=2CTPLUcQAjk [14:13] I picked it up this summer [14:13] It's fun [14:13] LOL [14:16] cbx33: Wait, is this your device? http://wiki.linuxmusicians.com/doku.php?id=presounus_audiobox_1818vsl [14:16] Hmm I will go and join linuxmusicians forums now:) [14:17] cbx33: Another thing you might want to check is whether changing usb port makes a difference. Check the IRQ's with: cat /proc/interrupts [14:17] ailo: nooooooooooooooooooo not an 1818 [14:17] just 2in2out [14:17] too bad [14:18] i have an maudio delta 1010lt though [14:18] cbx33, same machine? [14:18] cbx33: That'll at least serve great for comparison [14:20] no [14:21] delta1010 in a laptop :p [14:22] I would love an 1818VSL though :p [14:23] I'm thinking of trading my focusrite sapphire pro 40 for it [14:23] It's great, but it's firewire. Which kind of limits the options [14:23] well all i will say is my presonus sounded amazing [14:23] ahh yeh [14:23] they did a tudio bundle wit hthe presonus firewire - which i got very excited about [14:23] until i realised i didn't have firewire [14:24] can someone do me a favour - google for presonus m7 [14:24] and go to images.... [14:24] I'm a little new to condenser mics [14:24] it has a grill on front and back [14:24] and sounds different if you sing into the front or the back [14:25] is it a cardioid response? [14:25] cbx33: Yea [14:25] and you can choose which side to use for different applications? [14:25] or would you only ever use one side [14:25] cbx33: With cardoid, you can only use the one side [14:26] ok [14:26] it still sounded nice on the other side - but a bit more bass heavy [14:27] you'd never believe I have a degree in acoustical engineering would you :p [14:27] cbx33: The other side should sound like someone talking with their back turned towards you [14:28] Depends a bit on the room acoustics, whether you get a lot of high frequency into the mic that way [14:28] yeh [14:28] ahh room acoustics - that was a fun lecture [14:28] or series - the wave equation in 3D space - derivation [14:29] http://www.presonus.com/community/Learn/Equalizer-Terms-and-Tips - found this yesterday looks quite useful [14:30] I had once opened my mic, and screwed the actual microhpone the wrong way. I friend borrowed it and said the sound sucked, and that even his low value mic was sounding better [14:30] hahaha [14:30] I came to check. Turned it around, and suddenly the vocals started to sound really sharp [14:30] hahah [14:31] well ailo, I've only done limited recording with the presonus, like only got it yesterday, but have been exceedingly happy with it's performance and sound quality [14:31] oh a question guys....the USB should act almost like a decoupler shouldn't it? [14:32] I have a dynamic mic, AKG D69S and it was picking up the fan hum rom the laptop [14:32] that must have been some kind of electromagnetic effect right [14:32] i mean the is no way noise could have gotten from the laptop to the USB in/outs as that would have been a digital signal right? [14:33] cbx33, that should be... but if you are using power from the usb there may be some noise transfer [14:33] ahh I am [14:33] :( [14:33] The box has to power it's pre amp from something. [14:33] need to buy a USB hub and an optoisolator maybe :p [14:33] cbx33: Depends. Some combination of laptops and devices will introduce ground hum, if the laptop is connected to an electrical outlet [14:33] the M7 didn't suffer the same [14:34] no it was not 50Hz [14:34] it was much higher [14:34] a whine [14:34] Does your interface have a power plug on it? [14:34] The M7 should be a lot less forgiving when it comes to general noise in the room [14:34] len-dt: no [14:34] Usually, any computer will be too noisy for a condenser [14:34] powered through USB [14:35] Ya, some are either or, thought I would ask. [14:35] Mine has its own PS because it has tubes in it. [14:35] ahh [14:35] ailo - I had a little "noise" but only white [14:36] I once got clicking noise in some dynamic mics [14:36] Took us a while to figure out what it was. There was a vacuum cleaner next to the drums [14:36] Something about magnetism [14:37] It sounded like audio dropouts, which of course made me think it was the computer first, but since it only happened to some mics, it really bothered us for a while [14:39] hahaah [14:40] i had a nasty earth loop 10 years ago [14:40] :) [15:01] sorted it by twisting a paperclip around the rack ears of the behringer and the lexicon [15:10] ailo: I used to run Logic on an AMD K6-2 500 Mhz [15:10] heh [15:10] didn't get a whole lot of love fro mthat [15:15] Logic? Was that the old Windows version? [15:15] It had it's own sound, thanks to it's builtin plugins [15:25] yes [15:25] 4.5 [15:25] Gold [15:25] I was furious when they went mac only [15:25] but i did love the midi raouting and patching it did [15:26] I never got the logic of it. I much preferred cubase. Been a few years since I had Windows now though [15:26] yeh [15:26] i would love a better midi "munger" [15:26] mididings is nice - but with a gui it would be killer [15:27] the fade in/out on ardour - is there a way to "curve" rather than linear? [15:27] Haven't done much with it. But, I bet the boys at #ardour would know [15:27] yeh - it's a little too early in there atm :) [15:27] ailo: I will go sleep now [15:35] ailo do you use a multitracker? [15:41] cbx33: You mean, like Ardour? I don't use DAWs that much these days. Mostly puredata [15:45] ahh [15:46] http://en.wikipedia.org/wiki/Pure_Data? [15:47] JACK capable? [15:50] bbl [18:47] hey all [18:47] guitarix has a head that brings my machine to a crawl [18:48] sends JACK to 100% [18:48] it happens.. you tried the support channel? [18:48] no [18:49] i would guess they will askk if you are running the lastest from them, and you probably arent [18:49] cbx33: if youd like to file a bug report though... go for it [18:49] hmmm [18:49] must be my USB device related [18:49] could be [18:50] damn [18:50] ailo, you around? [18:50] with XRUNS.....what does count and notifications mean [18:50] what's the difference? [18:50] 1(14) [18:50] 1(140) [18:50] what does that mean? [18:51] cbx33: i could look that up, but i would try and catch las in #ubuntu [18:51] he wrote it, and would know [18:52] yeh [18:52] lemme rtfm [18:52] i remember the (*)'s being not as important though [18:52] cbx33: i like to see none there though [18:52] i know [18:52] cbx33: i dont think las would mind you asking [18:52] i talk to las a fair amount [18:52] i think i should try to low latency kernel [18:53] cbx33: yeah, if you arent, thats first thing [18:53] does anyone know does rtirq work with lowlatency kernel [18:53] or just RT kernel [18:54] cbx33: i know we didnt get the message about rt privs not being possible when testing the lowlatency kernel [18:54] i would try lowlatency, then RT [18:54] i actually have a USB device that works much better with the generic [18:54] really? [18:55] well this one doesn't apparently [18:55] i know people ate using the 18in18out version in linux [18:55] and it works well [18:55] mines just a 2in2out [18:55] guess i just need to get the settings right [18:55] cbx33: its just one random device.. i just happend to test it that way [18:57] weird [19:00] guitarix -> funkmuscle -> jazz [19:00] ruins my machine [19:00] both on internal and external audio device [19:02] cbx33, that does seem to be fixed in the new version. I had a few that really slowed my machine down too. [19:02] oh [19:02] new version as in? [19:03] I mean I'm getting 100% DSP here :) [19:03] But if you are running 12.04 you should have something pretty new [19:03] thats something we should look at and maybe backport [19:03] the thing that is funny is that though I hit 100% DSP, my CPU fan doesn't spin up [19:04] it seems to say it is 0.24.0 [19:06] 0.20.2 [19:06] maybe that's it then [19:10] len-dt, which version has the fix [19:10] 0.24.0? [19:12] it's the push-pull ones that do it [19:28] I had the one with the sort of gold/bronze color GUI where the main heqad would come up and the rack was separate. the new one has everything in the rack and by default comes up grey with presets at the bottom. [19:29] the old one had about half of the presets did bad things. [19:29] I think there may even be a newer one, but I am not sure. [19:31] His web page says 0.24.0 [19:39] cbx33, I have found the ladspa guitarix plugins a pain. any time there is no track where it is active strange things happen. [19:40] for example if a cut out a portion of a track becasue of background noise (or my bad playing) the guitarix plugin doesn't like that. [19:41] however, my machine is a 10 year old P4 and can only handle so much. [19:42] heheh I can't believe you're able to do anything on that [19:43] I had 5 or 6 tracks playing by then with other effects on abnout 2/3 of them. [19:43] audio is not that big a deal [19:44] its video that is pretty hard to handle with an old system [19:44] I recorded without effects at a lower latency and added effects after at a higher one. [19:44] len-dt: i do that just for good measure on my dual core :) [19:45] len-dt, good job [19:46] The only xruns I seem to get are when I hit the |< to go back to the track start. [19:47] dual monitors seems to be pretty common for audio work. [19:47] yeh [19:47] that's true [19:48] len-dt, is guitarix hard to build? [19:48] I just downloaded the package from the ubuntu repos with synaptic [19:49] oh [19:49] so you're running 12.04 [19:49] ya [19:49] so how come we got different versions? [19:49] 0.20.2 here [19:50] have you run the upgrade [19:50] i'm up to date as far as i know [19:51] open synaptic and see if it will let you install a newer one [19:51]