It is not intended for beginning users, as the configuration is relatively arcane.Įnsure that all of your USB audio devices are connected and detected by ALSA. This document describes a method of maintaining ALSA device numbers for USB devices, including MIDI devices.
This means that Jack has to be reconfigured after every restart or change. This is very useful for everyday use, but it becomes difficult for pro-audio use, as ALSA device numbers (hw:X) are not stable across reboots, or even when removed and reinserted.
Most modern Linux distributions use a hot-pluggable architecture for USB devices.
