Try this one:
class cfgMusic
{
tracks = { franz1,franz2 };
class franz1
{
name = "";
sound[] = {"\music\franz1.ogg", db+20, 1.0};
};
class franz2
{
name = "";
sound[] = {"\music\franz2.ogg", db+20, 1.0};
};
};
You only had one quote in the second music class, and none in the first.
Planck