A little more MIDI help, please

[Petrus de Calguarium]

I notice that a lot of MIDI programs require jack-audio-connection-kit in order to 
emit sound.

Do I need to somehow terminate pulseaudio before running jack, or will there be no 
problem with both on at the same time?

Will jack-controlled applications respond to the volume slider of kmix, even though 
this is used by pulseaudio?

And, when I am finished noodling, I will terminate jack, but do I need to somehow 
restart pulseaudio, or will it simply be working when jack stops?