JackAudio

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601 discussions

by Stefan Schmelz

I made a Prototype that uses jack directly now. I decided on working with Jack directly because I want to implement some features that would require rewriting parts of rtmidi or portaudio for my purposes. I want to enumerate ports and get raw ports, so I can have control over properties. I took a look into the rtmidi source, looking for the part how they get all the ports that jack knows about. I did nothing that would help me, so how could I do something about this?

5 years, 1 month

Jack C++ midi structural considerations

by Stefan Schmelz

I have tried the c++ version before but it was not working for me, I quite like the python version tho. Sadly the best performing Python code I got was too slow for me, so I opted for C++. My application is not really a real-time one, but it would be bad if you would see larger delays. Also I want to have a c++ project to practice ci and testing. Thanks for your reminder tho.

5 years, 1 month

Jack & systemd on RPI4

by pfl

Hello, I want jack to start at bood via systemd on a RPI4 but when I run qjackctl it does not see jack running (while it is) if I start jack from the command line , qjackctl sees jack running I tried sudo qjackctl, it crashed the RPI4 any help appreciated Phil [Unit] Description=Jack audio server After=sound.target [Install] WantedBy=multi-user.target [Service] Type=simple PrivateTmp=true Environment="JACK_NO_AUDIO_RESERVATION=1" #ExecStart=/usr/bin/jackd -T -ndefault -dalsa -dhw:0 -r48000 -p1024 -n2 ExecStart=/usr/bin/jackd -R -P20 -dalsa -dhw:0,1 -r49000 -p1024 -n2 -- L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast. https://www.avast.com/antivirus

5 years, 1 month

Routing audio between Audio applications in windows

by dinesh mareedu

Hi All, In my project, I want to route the audio between audio applications(Windows 10). I am not able initiate the audio routing unless my audio apps are using ASIO audio drivers. Can you help me with this? I want to route audio through applications which uses non-asio drivers. Please advise if any alternatives are available. Thanks, M.Dinesh

5 years, 1 month

Querying input ports for 1 input channel card fails (ALSA/USB)

by Kjetil Matheussen

Hi, A user reports that Radium prints an error when it tries to connect input ports. The user has a USB soundcard with just one input channel. Here's the code: https://github.com/kmatheussen/radium/blob/master/audio/KillJackd.cpp#L128 (If code has changed, search for "// Connect input ports") When running the program, the user gets this error message: "KillJackd.cpp: Could not connect input port 2" If there is only one input port, this message should not be printed, because portname for port 2 should be NULL. I don't see anything wrong with the code... Could it be a bug in Jack? Full discussion: https://users.notam02.no/~kjetism/radium/forum/viewtopic.php?f=7&t=265

5 years, 1 month

(no subject)

by Eng. Peter

Hi jack team .. hope you are well and safe .. i'm so happy to have an app like jack and i've done the setup and activation and everything is running smoothly ..i'm running pro tools 12 and the other DAW is Mixbus 6 on windows 10 64 bit .. but i have a major problem and i can't fix it .. so please help me in this problem .. i'm a sound engineer and i've my own system in my home studio .. i want to route pro tools channels into another DAW for mixing .. but all i have in pro tools for jack as a audio interface is for mono outputs (2 stereo outputs) so now i can route only 4 channels from pro tools .. and i have almost 60 channel in pro tools .. so how i increase the outputs of jack in order to appear in pro tools i/o setup page .. so i can route as many channels as i can from pro tools to any other DAW .. please help me in this issue because i put my work on hold till i fix this or know how to make jack with many outputs .. thanks and i really appreciate your help .. stay safe

5 years, 2 months

Version for Mac

by Tim O'Brien

Hi, I am wondering if anyone is upgrading Jack Audio for Mac or tried using the driver on a 64 bit mac. the JackPilot binary was created in 2011 so I am thinking JackRouter might need to be updated. Can anyone validate this and if so is there a project tro update JackRouter driver? Thanks Tim

5 years, 2 months

need help/freelancer

by Ajay Malik

Hi, Looking for help to create a cross platform application that will listen from speaker audio. Need help. Open to any level of help... - guide me - provide me a simple utility - engage for long term Thanks, Regards Ajay

5 years, 2 months

capture audio input on Mac

by Tim O'Brien

Hello, Is it possible to use Jack Audio to capture audio from the speaker on Mac. I want to save the audio in a file. So long as it works on Catalina or above is fine. thanks in advance Tim PS I believe this means capturing in the I/O Kit or AUHAL

5 years, 2 months

Trying to debug jackd crash (version 2)

by Ethan Funk

Howdy jack-audio people. It's good to have the list back! I have been developing a collection of programs that work together for radio automation. It's a port of a project I wrote and use currently under OSX to run a radio station I own. At this point, I have all the core stuff working on Ubuntu, less a new UI, which I have not written yet. But that is mostly OK because my old OSX UI can control most of the functions in the new components, and will work as I transition things. So that bring me to the mostly working part. I have been testing an testing and testing, and have come across a problem where my programs cause jackd to crash after running as a system for a few days. The core-mixer program is persistent. Media players are forked by, and connect back to the core-mixer (arServer) to play their files, etc., as needed, then quit. It appears this repeated life cycle of the media players are the cause, because the jackd crash always occurs just after a media player disconnects from jackd. I am running Ubuntu Studio tools, so as soon as jackd quits, it is re-run. Crashes again one to two more times, then runs without further disturbance, except that my core-mixer it written to quits when it get notice that jackd shutdown. All my core code is in straight C and can be found at https://github.com/eafunk/audiorack. Jackd does not crash with the core-mixer running with a single audio source connected to it, with out the media players loading and unloading. Neither does it quick when left alone with an audio source hard-routed to a destination without the core-mixer running. Can any one suggest how I could debug jackd to figure out what my program is doing to cause the crash? Debugging my code is pointless here, because it doesn't crashes when jackd does. Any pointers on how I can build jackd (the dbus multi-processor version) for debugging? Build tools give me nightmares, but I have to dig in to get this sorted out. Thanks Ethan Funk

5 years, 2 months

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