A way to replace more than one character (useful for weblinks and external connections to web sites or files):
$replace($replace(<artist>,/,),?,) - $replace($replace(<title>,/,),?,)
This will erase all "?" and "/" existent in the artist and title
$replace($replace($replace(<artist>,&,),/,),?,) - $replace($replace(($replace(<title>,&,),/,),?,)
This will erase all "?", "/" and "&" existent in the artist and title
etc