well, if someone is pretty awful but they sing a song everyone knows, you can all chime in and keep them on key etc...if it is not a song anyone knows, but has a tune or chorus, you can hum along etc..but if it is a tuneless sort of tune there is sfa you can do except listen to the lyrics and I am not one who really listens to the lyrics..I'd rather read them..who knows...there are some great ones that come along this way...mg