[With how close the Child is to him, Ignis can not only hear the tapping, but feel the vibration through the wood. Between the two sensations, it doesn't take him long to fall into the proper rhythm, and he smiles when he feels the raft pick up some speed.]

I can't begin to guess what your worlds are like, but on mine, this is how they kept rowers in time before there were motors to power boats. A drummer beat out each stroke.

[Don't mind Mr. Factoid over here. Ignis just doesn't want anyone to give him full credit for an idea that was thought up long before he was even born.]