I download and installed Qtractor without a problem but when I use it I can't hear anything, I believe it has something to do with jack and I'm not sure if it is properly configured, I have installed qjackctl and have some problems with memory allocation but have used
setcap cap_ipc_lock,cap_sys_nice=ep /usr/local/bin/qjackctl
setcap cap_ipc_lock,cap_sys_nice=ep /usr/local/bin/qtractor
and think to solve the problem. Still I can hear anything... I don't understand completely how jack works, and I'm new with all this audio thing...
Thanks in advance.