"pleasant tune" is a perfectly correct and usable phrase in written English.
You can use it when you are describing a soothing or calming sound. For example, "The birds sang a pleasant tune, making it a peaceful morning."
There's no doubt, though, that he can write a pleasant tune, and sing it with sweet sincerity.
Lord Thomas and fair Ellinor, together with the downfal of the brown girl : to a pleasant tune, call'd, Lord Thomas, & c.
As little Oliver, Mark Lester is fine, and the entire cast sings Bart's pleasant tunes with clarity and great beauty.
An upbeat stopping point between Bon Iver's cabin in the woods and the melancholy solitude of Brian Wilson's teenage room, C Duncan's Mercury prize-nominated album Architect creates its reveries with stacked harmony vocals and some pleasant tunes, guileless melodic gifts that will possibly put some in mind of Neil Hannon's group the Divine Comedy, if lacking the presence of a likely breakout hit.
So, in that same grocery line on a different day, I was unconsciously humming a pleasant little tune.
The scolding wife : to a pleasant new tune.
The three vvorthy butchers of the north : I weep, I wail, and travel much in pain : now all my youthful days are spent, they'l never come again : once I was a man, but now alas am none, for all my companions are from me fled, and gone, to a pleasant new tune.
Oppertunity lost, or, The Scotch lover defeated : here Willy follows Peggy still but ner'e attains to have his will his slowness caus'd the hasty maid to call a miller to her ayd : who nimbler then her lover seaz'd and straight her hasty passion eas'd : to a pleasant Northern tune : with allowance.
IN the opening scene of "Fiddler on the Roof," Tevye, the show's narrator, explains that each Jew in the shtetl Anatevka is like "a fiddler on the roof, trying to scratch out a pleasant, simple tune without breaking his neck".
The west-country jigg, or, Love in due season : a longing maid which had a mind to marry, complaining was, that she so long should tarry : at length a brisk young lad did chance to spy her, and liking of her well, resolv'd to try her : and courting her, and vowing to be constant, they there clapt up a bargain in an instant : to a pleasant new tune, called, New Exeter : with allowance.
