Music isnt working with microphone with souncard input selected

[DrO]

old versions of the Source DSP are not supported and are probably less likely to work. so if you try then you're own with it (which is why the docs, etc state that things aren't right with the Source DSP for the PTT feature on newer OSes). the most likely solution is to use a 3rd party source which does what you want (though in most cases that means paying for it).