Psalms 150:3

Praise him with the sound of the trumpet
Which was used in calling the assembly together, for worship and on other occasions; and at the feast of blowing of trumpets, and in the year of jubilee, ( Numbers 10:1 Numbers 10:2 ) ( Leviticus 23:23 ) ( Leviticus 25:9 Leviticus 25:10 ) ; and by the priests in temple service, ( 1 Chronicles 16:6 1 Chronicles 16:42 ) ; and was typical of the Gospel, which gives a certain and joyful sound, and is the cause and means of praising God, ( Isaiah 27:13 ) ;

praise him with the psaltery;
to which psalms were sung;

and harp;
which were instruments of music, both used in divine worship under the former dispensation; and in which David was well skilled and delighted, and appointed proper persons to praise with them, ( 1 Chronicles 15:20 1 Chronicles 15:21 ) . They were typical of the spiritual melody made in the hearts of God's people, while they are praising him in psalms, hymns, and spiritual songs, under the Gospel, ( Ephesians 5:19 ) ( Revelation 5:2 Revelation 5:8 ) ( Revelation 14:2 Revelation 14:3 ) .