[linux-audio-user] Some questions

1. Are alsa drivers multi-client? (Two applications can read/write simultaneously to the in or out--i.e. a patch controller and a sequencer doing notes). 2. Can dummy MIDI devices be installed (virmidi?) to be used for pipelining midi-out from one program to midi-in to another or for overcoming single-client problems (Windows examples MidiYoke, MidiMatrix, Hubi's). 3. Seeing as wine sessions successfully enumerate the MIDI devices and actually played to one! but no native program such as Rosegarden has--KDE has a MIDI-mapper dialog similar to windows. Must they be set up there from /dev/ mid0 .... references? 4. Jack has been recommended. What precisely is this and how does this work? 5. Can the recommended Ardour/Jack rpm for Madrake be used on Debian?