right this works for me in a campaign
class CfgMusic
{
tracks[]={example};
class example
{
name = "example";
sound[] = {\..\..\..\..\addons\pboname\musicname.ogg, db+0, 1.0};
};
};
don't put pboname.pbo
If its a single mission I think the path would be this
\..\..\..\addons\pboname\musicname.ogg