Psalms 92:3

Upon an instrument of ten strings
An harp of ten strings, as the Targum. The harp invented by Terpander had only seven strings {c}; according to Pliny ^F4; Simonides added the eighth, and Timotheus the ninth; but this of David was of ten strings:

and upon the psaltery; of which (See Gill on Psalms 33:2), "upon the harp with a solemn sound"; or "upon higgaon with the harp"; which "higgaon", Aben Ezra says, was either the tune of a song, or an instrument of music; all these instruments of music were typical of the spiritual joy and melody which the saints have in their hearts when they praise the Lord; hence mention is made of harps in particular in this spiritual sense, under the Gospel dispensation, ( Revelation 5:8 ) ( Revelation 14:2 Revelation 14:3 ) ( Revelation 15:2 Revelation 15:3 ) .