JackAudio

jackaudio@lists.linuxaudio.org

601 discussions

[Jack-Devel] Log output for inprocess clients

by Robert Bielik

Hi all, I'm putting together an inprocess client (as it was the lowest hanging fruit), but I'd like to output log messages, I note that outputting to stdout/stderr doesn't seem to work. Is there any API into which I can hook my logging framework output ? Regards /Robert

7 years, 5 months

Re: [Jack-Devel] Usage feasibility Q

by Chris Caudle

On Wed, January 31, 2018 9:03 am, Robert Bielik wrote: > Ok ð although this is jack2 built *without* dbus and running on a > headless RPi3. How does the rc.local start jackd under the user account? Maybe it could start a screen session at that point, and when you ssh in you can connect to the screen session. If you are not familiar with screen it is an application that (among other features) will let you disconnect an ssh session while the underlying terminal session continues to run (usually breaking the ssh session will kill the terminal session associated with that login). When you connect again with ssh you start screen with the -r argument to restore connection to the already running screen session rather than starting a new session. -- Chris Caudle

7 years, 5 months

Re: [Jack-Devel] Usage feasibility Q

by Chris Caudle

On Wed, January 31, 2018 9:30 am, Robert Bielik wrote: > As shown here (I wrote that msg in the forum): "You have been notified about this topic, please login to view it." I don't really feel like going through the effort of creating a new account on some web site I've never heard of to fix your problem. If you would like help on this mailing list then I recommend you send relevant information to this mailing list. > The files in /dev/shm aren't supposed to vanish during > lifetime of jackd process, right ? Not typically. I found this in common/JackShmMem.cpp: jack_log("JackShmMem::delete size = %ld index = %ld", size, info.index); So it seems like at least some shared memory operations get logged. Maybe try -v for verbose logging. -- Chris Caudle

7 years, 5 months

[Jack-Devel] Usage feasibility Q

by Robert Bielik

Hi all, New to JACK wrt actual usage, I'm having a project which I want to setup as follows: 1. JACK in (hw:0,0) -> "JACK mixer" (This one should be as low a latency as possible, preferably 48 frames @48 Khz, i.e. 1ms buffer size) 2. Any-app-using-ALSA -> ALSA JACK plugin -> JACK "mixer" 3. JACK "mixer" -> JACK DSP plugin -> JACK out (hw:0,0) This will, in this particular case, run on a RPi3. Design goals are: One low latency route between input and output on a I2S sound card (1. above) and the rest of the applications using ALSA should share a higher latency route. The output of the JACK "mixer" should pass a JACK plugin before reaching hw:0,0. Before I get my hands too dirty I'd just like to ask if this architecture is feasible to do ? Regards /Robert

7 years, 5 months

Re: [Jack-Devel] ?==?utf-8?q? Usage feasibility Q

by Ralf Mattes

Am Mittwoch, 31. Januar 2018 16:03 CET, Robert Bielik <Robert.Bielik(a)dirac.com> schrieb: > > >> Socket is associated with the desktop session? > > > > > > Ah, seems like a very reasonable explanation. Although I'm not nearly > > > linux-savvy enough to "fix" this, so I'd appreciate pointers �� > > > > I'm just regurgitating buzzwords connected to "dbus". Maybe they help > > trigger the memory of someone who actually has a clue. > > Ok �� although this is jack2 built *without* dbus and running on a headless RPi3. Yes, D-Bus is only one part of Linux session handling. Both systemd (most likely your init system) and PAM will do some magic. To find out where your jack client expexts jackd's socket run: $ strace -e connect,open jack_lsp -c > /dev/null Cheers, RalfD

7 years, 5 months

Re: [Jack-Devel] Usage feasibility Q

by Robert Bielik

> Yes, I managed to get it working with that guide, however now I have > intermittent problems when rebooting, I think it is due to the LD cache, > sometimes .so files in /usr/local/lib are not found. In these cases, when it doesn't work I get: Could not open driver directory /usr/lib/arm-linux-gnueabihf/jack: No such file or directory Could not find any drivers in driver directory! Failed to create server object So I do: sudo ldconfig /usr/local/lib/ and voila, it works again. As you probably can tell, Linux is not my forte... Regards /R

7 years, 5 months

[Jack-Devel] Retrieving Port ID

by Thomas Brand

Hi, when looking at jack_evmon output, it tells numeric port ids when a new port is registered, unregistered or connected. I wondered if there is an API method to get the same number from a jack_port_t or port name string. Best regards Thomas

7 years, 5 months

Re: [Jack-Devel] Using USB sound card with Jack

by Chris Caudle

On Mon, January 15, 2018 10:13 am, Benny Alexandar wrote: > I want both PC and USB sound card ports to be accessed at the same time. The design of jackd (really any sound server) requires it to be synchronized to the sampling clock of the interface, and since your two interfaces are not synchronized to each other then jackd cannot use both at the same time without some intervention. Using two at the same time requires choosing one card to the be the main backend device, then loading a sample rate converter to make the sample stream rate to and from the secondary card(s) match exactly that of the main card. The packages you want are zita-alsa2jack and zita-jack2alsa, in Fedora both come together in a package named zita-ajbridge. This is covered in the jack FAQ, which needs to be updated, the section describing alsa_in and alsa_out bridges is the relevant section, but those older implementations had some problems, the zita bridges are higher quality replacements. http://jackaudio.org/faq/multiple_devices.html The zita tools are included in the audio aware distributions, if you are using a distribution which does not package them for some reason you can get them along with the other zita applications here: https://kokkinizita.linuxaudio.org/linuxaudio/ The jackd v1 implementation includes the equivalent of the zita bridges internally, they need to be enabled from the command line but not loaded as an external component. The jackd v2 implementation (I think you said you were using jackd 1.9.12, that is considered jackd v2) does not yet include the zita bridges as part of the server, you will need to load them externally. -- Chris Caudle

7 years, 5 months

Re: [Jack-Devel] Using USB sound card with Jack

by Chris Caudle

On Sun, January 28, 2018 9:34 am, Benny Alexandar wrote: > After starting jack server using qjackctl What jack settings were used in qjackctl? Which driver was chosen, and which interface? > Then in qjackctl connected the graph as shown in the attached picture. That graph works if j2a is controlling the sound card, if jack was started with the ALSA driver and the USB device as the interface then jackd would already be controlling the sound card. When providing information it will save a lot of time if you actually copy and past the command line you used as well as the resulting messages. For example you stated that you started zita-a2j, did you start zita-j2a with the same command line parameters as zita-a2j? What status messages were printed at that time? What was in the messages window of qjackctl (that is where the output from the jackd server is displayed)? You have given about a fourth of the information needed to help you determine what is happening on your system. -- Chris Caudle

7 years, 5 months

[Jack-Devel] Problem with uninstalling Jack Audio Windows 10 / Problème avec désinstallation de Jack Audio Windows 10

by Vincent NICOLAS

Hello, Hello, I tried to configure Jack control (Jack_v1.9.11_64_setup.exe) to bind Traktor to Ableton but the solution did not suit me, I uninstalled Jack Audio control and since then I can not launch the TRAKTOR 64-bit application . I can still launch TRAKTOR in 32 but the uninstall has removed something that blocks the software. Thank you for your help. Vincent Bonjour, J'ai essayé de configurer Jack control (Jack_v1.9.11_64_setup.exe) pour lier Traktor vers Ableton mais la solution ne me convenant pas, j'ai désinstallé Jack Audio control et depuis je ne peux plus lancer l'appli TRAKTOR en 64 bits. Je peux encore lancer TRAKTOR en 32 mais la désinstallation à enlevé qelque chose qui bloque le logiciel. Merci de votre aide. Vincent

7 years, 5 months

← Newer
1
...
27
28
29
30
31
32
33
...
61
Older →

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

JackAudio