| caodepalha | Hi everyone | 09:10 |
|---|---|---|
| cfhowlett | caodepalha, greetings | 09:10 |
| caodepalha | I have a question here. I read in a book that it is advisable to remove the pusleaudio package in ubuntustudio. it read that both servers running at the same time jackd & pulseaudio) can cause problems. is this correct? | 09:12 |
| caodepalha | does anyone know anything about this? | 09:22 |
| XRS1 | i havent had any problems | 09:24 |
| zequence | caodepalha: Not correct | 09:37 |
| zequence | caodepalha: What book was that? | 09:37 |
| caodepalha | let me check again | 09:42 |
| caodepalha | its a book called crafting digital media | 09:42 |
| caodepalha | Crafting digital media, Audacity, Blender,Drupal, GIMP, Scribus and other open source tools | 09:43 |
| cfhowlett | caodepalha, read it. since published, it seems the pulse/jack conflicts have been ironed out. and if YOU haven't experienced problems, why would you even consider it? | 09:44 |
| caodepalha | by Daniel James | 09:44 |
| caodepalha | i get a lot of xruns when recording | 09:44 |
| zequence | caodepalha: Is it a Ubuntu Studio install? | 09:45 |
| caodepalha | in the book it says it is related to the settings in jack and problems with pulse audio | 09:45 |
| caodepalha | yes it is ubuntu studio | 09:45 |
| zequence | the book is wrong | 09:45 |
| caodepalha | ok thank you | 09:45 |
| cfhowlett | "a lot"? anyway, try it and compare. | 09:45 |
| zequence | jack settings, yes. but not because of pulseaudio | 09:45 |
| caodepalha | do you know what xruns are about? | 09:45 |
| zequence | xruns means that jack was not able to process the audio in time | 09:46 |
| zequence | theres another word for that: audio dropout | 09:46 |
| caodepalha | is that a problem when recording? | 09:46 |
| zequence | Yes, because you get click sounds | 09:46 |
| caodepalha | sorry i'm still a newbie | 09:46 |
| caodepalha | any tips on how to avoid that? | 09:46 |
| zequence | caodepalha: do this command: cat ~/.jackdrc | 09:46 |
| cfhowlett | caodepalha, FYI, the 12.04 kernel seemed to fix that issue | 09:46 |
| zequence | cfhowlett: Which issue is that? | 09:47 |
| cfhowlett | zequence, jack/pulse audio conflicts | 09:47 |
| zequence | cfhowlett: not related to the kernel | 09:47 |
| zequence | there was a bug in pulseaudio, which I fixed | 09:47 |
| zequence | had to do with pulseaudio not letting go of the audio device, when jack asked for it | 09:48 |
| zequence | jack1 is not able to grab the card at all | 09:48 |
| zequence | only jack2 | 09:48 |
| cfhowlett | zequence, entirely possible/likely that I used the wrong term there ... | 09:48 |
| zequence | there was another problem with jack earlier, making it impossible to kill it sometimes | 09:48 |
| zequence | that was fixed too | 09:48 |
| zequence | neither problem was causing xruns | 09:49 |
| zequence | I didn't code the fix, but I pathched both packages, just to be clear | 09:49 |
| caodepalha | so should i run the: cat ~/.jackdrc ? | 09:50 |
| cfhowlett | zequence, you contributions are MUCH appreciated! | 09:51 |
| zequence | caodepalha: Yes. Paste the results here | 09:51 |
| cfhowlett | zequence, here's mine. What's it all mean? /usr/bin/jackd -p 128 -R -P 60 -T -d alsa -n 2 -r 48000 -p 1024 -d hw:0,0 | 09:54 |
| zequence | "-p" stands for frames per period. It is quite low, so should give you ok latency, and hopefully no xruns | 09:58 |
| zequence | To see what the rest means, do: jackd -d alsa --help | 09:58 |
| vlt | holstein: I got the source from their website because I wanted to compile it on Debian. But I failed. So I downloaded their binary for Ubuntu and after hours of installing dependencies ... it kind of works. | 09:59 |
| zequence | Actually, some options are not alsa specific, so to see them, do: jackd --help | 09:59 |
| vlt | Except for freezing X for several minutes and OOMs .-/ | 09:59 |
| caodepalha | ok these are the results: /usr/bin/jackd -p128 -dalsa -r192000 -p128 -n2 -Xseq -D -Chw:0 -Phw:0 | 10:02 |
| caodepalha | do i need to start jack before running the command? | 10:02 |
| zequence | caodepalha: What you did was print out the contents of the file .jackdrc in your home folder | 10:04 |
| zequence | caodepalha: If you would start jack manually using a terminal, you could use a command like that. But, you don't need to | 10:04 |
| zequence | caodepalha: That command is how you have set up qjackctl | 10:04 |
| caodepalha | ok... | 10:04 |
| caodepalha | is it correct? | 10:05 |
| zequence | caodepalha: The reason why you are getting xruns is because you have a very low latency setting | 10:05 |
| caodepalha | ah ok. what can i change on jack setting then? | 10:05 |
| zequence | caodepalha: -p128 means 128 frames/period. Together with 192000 samplerate, that gives jack a very small amount of time to finish its processes | 10:05 |
| zequence | caodepalha: Use qjackct, and raise the frames/period, or use a lower samplerate. Do you need 192kHz= | 10:06 |
| zequence | ? | 10:06 |
| caodepalha | ok let me check! | 10:06 |
| zequence | caodepalha: Do you monitor yourself through the software? What do you use for recording? Ardour? | 10:08 |
| zequence | If you have a mixer for monitoring, you don't need low latency - unless of course you are playing a soft synth, or using some FX, like a virtual amp while recording | 10:08 |
| caodepalha | I use ardour | 10:08 |
| zequence | caodepalha: What sort of stuff do you record? Is it all line in, and no live FX from your computer? | 10:09 |
| caodepalha | I use ardour. I connect the electir guitar directly to the laptop input. my midi is connected directly to the laptop as well. when i record vocals i connect a condenser mic through a mixer and then onto the laptop | 10:10 |
| zequence | caodepalha: midi, as in midi cable, or the audio output from a keyboard? | 10:10 |
| caodepalha | i use electric guitars, acoustic guitars, a condenser mic and a shure sm58, a small beringer mixer and oxygen8 | 10:11 |
| zequence | midi is not audio. It's a data control format. you can use it to control synthesizers | 10:11 |
| caodepalha | i connect oxygen8 via usb | 10:11 |
| caodepalha | yes | 10:12 |
| cfhowlett | caodepalha, yeesh. that's kind of asking a lot. you got a super duper system or something? I used an interface when I recorded for my laptop. | 10:12 |
| zequence | ok, so do you use soft synthesizers? That would be the live FX I'm talking about | 10:12 |
| caodepalha | yes eventually i use amsynth and phasex | 10:12 |
| zequence | caodepalha: While you are not using any live processing, i.e. a soft synth, you can raise latency while recording | 10:13 |
| zequence | caodepalha: Raise frames/period to at least 1024 | 10:13 |
| zequence | you can even use 2048 | 10:13 |
| zequence | And use your mixer for monitoring for the external audio sources, as your guitars and vocals | 10:14 |
| zequence | When you record soft synths, you need to find out an optimal latency level. You might not need 192kHz. 48kHz is quite enough. | 10:14 |
| zequence | And while recording, don't mess with the computer. Just click record, and then use your keyboard | 10:15 |
| caodepalha | iḿ getting started on linux. i'm a total newbie.in the first experiences i made with ardour i dropped a few loops on it, then went to record some electric guitars | 10:15 |
| caodepalha | latter added some synths | 10:16 |
| caodepalha | and more guitars | 10:16 |
| zequence | caodepalha: What kind of audio card do you have? | 10:16 |
| caodepalha | you're saying i should raise the frames or use a lower sample rate right? | 10:17 |
| caodepalha | this is a laptop i got from a friend | 10:17 |
| caodepalha | how can i know about the soundcard? lol | 10:17 |
| zequence | caodepalha: Both would be good, actually | 10:17 |
| zequence | caodepalha: Oh, so it's the builtin audio device? | 10:17 |
| zequence | cat /proc/asound/cards | 10:18 |
| caodepalha | yes... for now it is. i'm planning on getting an external soundcard | 10:18 |
| zequence | ..for seing the audio devices | 10:18 |
| caodepalha | 0 [Intel ]: HDA-Intel - HDA Intel | 10:18 |
| caodepalha | HDA Intel at 0x92400000 irq 43 | 10:18 |
| cfhowlett | caodepalha, see presonus 1box/audiobox. works with linux out of the box. | 10:18 |
| caodepalha | here it is | 10:18 |
| zequence | caodepalha: 128 frames/period might work if you use 48kHz samplerate. If that doesn't work, try 256 frames/period with 48kHz samplerate | 10:18 |
| caodepalha | ok! | 10:19 |
| zequence | caodepalha: If you still have a lot of xruns, come back | 10:19 |
| caodepalha | I cannot thank you enough! Its a bit of a learning curve to get around linux but i'm loving it. people are very helpfull. this is great! thanks alot | 10:20 |
| zequence | caodepalha: Have fun | 10:22 |
| caodepalha | this is what i've made with ardour so far: https://soundcloud.com/caodepalha/fairground-voodoo-mix-cheap | 10:45 |
| zequence | caodepalha: Nice stuff | 10:53 |
| zequence | caodepalha: There is actually one thing that could cause xruns, and that is the pulseaudio to jack module. It's a package called pulseaudio-module-jack. You can disable the module, either by uninstalling that package, and restarting pulseaudio (pulseaudio -k), or by disabling dbus support for jack in qjackctl -> Misc | 10:55 |
| zequence | The module acts as any other jack client | 10:55 |
| zequence | but, it can use a lot CPU power. If you don't need to listen to youtube while recording, you can just uninstall that package | 10:55 |
| caodepalha | i dont need to listen to youtube while recording | 10:56 |
| caodepalha | can it be unistalled in the software center? | 10:57 |
| caodepalha | uninstalled* | 10:57 |
| zequence | caodepalha: sudo apt-get remove pulseaudio-module-jack | 10:58 |
| zequence | caodepalha: or use synaptic. You can install synaptic from the software center | 10:58 |
| zequence | just remember to restart pulseaudio. Also, quit jack before you do. To restart pulseaudio, kill it: pulseaudio -k | 10:58 |
| caodepalha | jack is not started right now. can i perform those commands anyway? | 10:59 |
| caodepalha | ok i've just done those commands | 11:23 |
| mo | 0913 | 12:39 |
| === mo is now known as Guest6012 | ||
| Guest6012 | 0913 | 12:39 |
| === Fyodorovna is now known as wilee-nilee | ||
| nimbiotics | After allowing some updates earlier today my soundcard started making funny noises as the volume level indicator showed up time after time. After rebooting, I am getting no more audio from my card, even though everythinh 'seems' normal. any ideas? TIA! | 22:16 |
| XRS1 | Application Launcher -> Terminal Emulator -> alsamixer | 22:18 |
| XRS1 | make sure its not muted, turned down and that the correct card is being used | 22:18 |
| nimbiotics | XRS1, Master level is at 57, but Headephone , does not show a value (zeroed?) How do I raise the volume lvel in alsamixer? | 22:27 |
| XRS1 | use the tab key and the arrow keys to navigate | 22:31 |
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