Hi! Recently when I work with projects with midi tracks the volume of the playback can not be controled by the master volume of the laptop and is always max. If I change to instrument tracks it is not like that. For exemple if I introduce one instrument track among the midi tracks it would playback from the loudspeakers of the laptop and not come out from the headphone jack. If I change all of the tracks to instrument, then the sound appears in the headphone jack again.
What is the problem?
Tanks in advance! 
Hi,
Where are the MIDI Tracks routed to, please?
Hi Martin! Thanks for writing!
I am not quite sure how to check it out. Anyway in the Inspecotr I can find that Outout routung is to Microsoft GS Wavetable Synth.