What is "tuneable"

Usage examples of "tuneable".

But first from under shadie arborous roof, Soon as they forth were come to open sight Of day-spring, and the Sun, who scarce up risen With wheels yet hov'ring o're the Ocean brim, Shot paralel to the earth his dewie ray, Discovering in wide Lantskip all the East Of Paradise and EDENS happie Plains, Lowly they bow'd adoring, and began Thir Orisons, each Morning duly paid In various style, for neither various style Nor holy rapture wanted they to praise Thir Maker, in fit strains pronounc't or sung Unmeditated, such prompt eloquence Flowd from thir lips, in Prose or numerous Verse, More tuneable then needed Lute or Harp To add more sweetness, and they thus began.