Revelation 14:2

And I heard a voice from heaven, like the voice of many waters, and like the voice of loud thunder.  And I heard the sound of harpists playing their harps.

·        This is the voice of God (Revelation 1:15 and 4:5). Perhaps God spoke here to proclaim His approval of these 144,000 faithful servants in the spirit of Matthew 25:21: Well done, good and faithful servant.   (DG)

·        We remember that the elders of Revelation 5:8 have harps. Perhaps this is where their music is heard, to accompany the worshipful singing of the 144,000 as they sing a new song, unique to them.  (DG)

Ezekiel 1;24  When they went, I heard the noise of their wings, like the noise of many waters, like the voice of the Almighty, a tumult like the noise of an army; and when they stood still, they let down their wings.

Psalm 144:9  I will sing a new son to You, O God; on a harp of ten strings I will sing praises to You.