Another long one with some interesting detail:

“...fiddler and fifer all ready to strike up any favorite tune amongst the ship's company. The moment the end of each hawser enters the hawse-hole, away with it, strike up fiddler or fifer, and make a clear run fore and aft the deck until you get in the slack...” [p.65]

“By having the fiddler to play to the men while stoning the decks, I have invariably found that they have rubbed harder, and kept time to the music; this method will prevent that chit chat which you so often hear between the men while stoning the decks, their attention being quite taken up with their work and the music. It always struck me that the decks were better and sooner done in this manner, and the men in much better spirits.” [pp.74-75]

“Ships are frequently deficient of the music which Jack likes best—his favorite fiddle. We have often heard the sailors say, that it was no dance without a little cat-gut. If the seamen have such a liking for this instrument, would it not be desirable to have a rating for a fiddler on board of each of Her Majesty's ships having any stated number of men, with an allowance for a fiddle, and strings. This expense, a few years ago (I believe still) falls upon the senior lieutenant, or by subscription amongst the crew, therefore fiddle or no fiddle, according to fancy. The want of a good fiddler to a ship is a very great loss. A good fifer may do well, but the fife is not the favorite instrument with sailors ; neither can the fifer play so long ; and has many more excuses for not being able to play, such as sore lips, cold, weak chest, with many other et ceteras, which all those who have had these things to contend with, will know too well about. Look at the heavy work of catting and fishing anchors, hoisting topsails, &c. You could far better spare ten men in a full-manned large vessel, while doing this work, than the fiddler or fifer. Every one who has attended to the catting and fishing of an anchor, with or without music, must have remarked the spirited way in which an anchor is walked up with music, the men's feet keeping time beautifully to the tune. You have only to see the same anchor catted without music, to know the effect of the combination of force when applied, by keeping time to music.” [p.302-303]
[Professional Recollections on Points of Seamanship, Liarden, 1849]