Breakdown of Le karaoké, tu dois l'essayer, ne serait-ce que pour t'amuser.
tu
you (informal singular)
pour
for
devoir
to have to / must
essayer
to try
Questions & Answers about Le karaoké, tu dois l'essayer, ne serait-ce que pour t'amuser.
How does ne serait-ce que translate literally, and what exactly is its role here?
It literally means "would it only be that". It is a fixed, invariable phrase used to introduce a minimum condition or reason. In this sentence, it translates to "if only", showing that having fun is reason enough to try karaoke.
Why say Le karaoké, tu dois l'essayer instead of just Tu dois essayer le karaoké?
Why is there a hyphen in serait-ce?
The hyphen shows subject-verb inversion, which is normally used for asking questions. Here, it is frozen in this specific fixed expression, using the conditional form of the verb être (serait) inverted with the pronoun ce.
Why is it pour t'amuser instead of pour s'amuser?
Even when a reflexive verb like s'amuser (to have fun) is in the infinitive form because it follows a preposition like pour, its reflexive pronoun must still match the person doing the action. Since the subject of the sentence is tu, the pronoun changes to t'.