@bocanegra Thank you, i do hve librewolf (firefox) open, so i want that to work. i installed qjackctl and pulseaudio-jack on my artix (arch based) openrc system. it worked, purr data works, but librewolf audio clips and sounds like crap, i disconnected my usb headphones and reconnected them, but now librewolf outpts no audio, the same with purr data, except it shows up in the graph in qjackctl unlike librewolf which disappeared from there.

i restarted my system just now and jack won't start for some reason, but librewolf audio works fine.

error message in qjackctl:

13:31:47.206 JACK is starting...
13:31:47.208 /usr/bin/jackd -dalsa -dhw:0 -r48000 -p64
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
13:31:47.226 JACK was started with PID=3085.
Could not open component .so '/usr/lib/jack/jack_firewire.so': libffado.so.2: cannot open shared object file: No such file or directory
Could not open component .so '/usr/lib/jack/jack_firewire.so': libffado.so.2: cannot open shared object file: No such file or directory
jack_get_descriptor : dll 
jack_get_descriptor returns null for 'jack_firewire.so'
Could not open component .so '/usr/lib/jack/jack_firewire.so': libffado.so.2: cannot open shared object file: No such file or directory
jackdmp 1.9.19
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
Copyright 2016-2021 Filipe Coelho.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
Cannot lock down 107341340 byte memory area (Cannot allocate memory)
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0|hw:0|64|2|48000|0|0|nomon|swmeter|-|32bit
ATTENTION: The playback device "hw:0" is already in use. Please stop the application using it and run JACK again
Released audio card Audio0
audio_reservation_finish
Cannot initialize driver
JackServer::Open failed with -1
Failed to open server
13:31:47.348 JACK was stopped
13:31:49.270 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock

Any help?

Hey, I'm back with pure data, now trying to get purr data to work on linux after using vanilla on windows, but i needed jack as a dependecy so i installed jack2, but i screwed it up somehow, i get no sound and i'm not familiar with jack or jack2.
i get

error snd_pcm_open (output): Device or resource busy

with ALSA, and

Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock

with JACK

Any suggestions?

@jyg i'd suggest installing another os for this like BSD or Linux, i had similar problems on windows 10, and i tried jack and ASIO4ALL, and had some success, but i was a pain to deal with, now i uninstalled windows and installed linux, and everything just works, unfa ||https://www.youtube.com/user/unfa00|| has some great videos on jack and sound production on linux.

i have checked this page, but it didn't seem to tell me where i should put the plugin file, and what the file extension should be.
my os is arch linux.

@lomz obviously possible, but idk how, don't use mac or windows though.

@solipp oof

@ingox WHAT!?? expr is using decimal!?? you must have missed something, where did you get that info, no sane real programmer whould ever write a programming language with decimal.

@ingox ye, but why would you do that to a computer?

@whale-av you have great knowledge, but why would it calculate both? it seems like a stupid feature... it does not do anything. is it to keep the code "stupidly simple" (KISS)?

@flight453 i have made an abstraction for this, feel free to use as you like. velocity-senitivity.pd just download it and call it in your patch.

when you call a patch (or any normal file) in pd through directory traversing in objects, there are some rules (idk if i know all, because i have just stumbled upon them randomly):
a: to call a patch in the same directory (folder) as your main patch, just type out the name, excluding the ".pd" at the end, so velocity-senitivity.pd becomes velocity-senitivity.
b: to call a patch inside a directory which is inside the same directory as your main patch, just type the directory name for the directory inside the shared directory, then a "/" and then the filename, again, excluding ".pd", so velocity-senitivity.pd inside the directory "abstractions" which shares the directory with your main patch, becomes abstractions/velocity-senitivity. you can go as many directories in as you like, so abstractions/midi&more/velocity-senitivity
c: if it is outside your directory type one "." for as many directories you have to go outside and then "./" (yes, that is a "." followed by a "/") and then your patch name, again, excluding ".pd".
d: you can type what rule "c" says and not entering the patch name, and then type what rule "b" says. here's an example of this in action .../abstractions/midi&more/velocity-senitivity, so the ".../" means that you shold go back 2 directories, and "abstractions/midi&more/" means that you should go inside the folder "abstractions", and then "midi&more", and "velocity-senitivity" is the the patch that you want to use.
e: just typing out the full directory, again excluding the ".pd"

you'r welcome