'Harp' in the Bible

Even inanimate things--flutes or harps, for instance--when yielding a sound, if they make no distinction in the notes, how shall the tune which is played on the flute or the harp be known?

And when He had taken the book, the four living creatures and the twenty-four Elders fell down before the Lamb, having each of them a harp and bringing golden bowls full of incense, which represent the prayers of God's people.

No harp or song, no flute or trumpet, shall ever again be heard in thee; no craftsman of any kind shall ever again be found in thee; nor shall the grinding of the mill ever again be heard in thee.