Yesterday at my church we sang/said Psalm 104 as a response to the story of creation in the first chapter of Genesis. I wrote a melody to the last half of verse 35, which we used as the refrain before/after different chunks of the Psalm, and we said those chunks of verses over the musical accompaniment.
It worked pretty well, so here’s a rough video of me showing how it goes. (And here’s a PDF of the chord chart, which has the melody of the refrain I wrote.)
[35b] Bless the LORD, O my soul!
Praise the LORD!
 Bless the LORD, O my soul! O LORD my God, you are very great!
You are clothed with splendor and majesty,
 covering yourself with light as with a garment,
stretching out the heavens like a tent.
 He lays the beams of his chambers on the waters;
he makes the clouds his chariot; he rides on the wings of the wind;
 he makes his messengers winds, his ministers a flaming fire.
 He set the earth on its foundations, so that it should never be moved.
 You covered it with the deep as with a garment;
the waters stood above the mountains.
 At your rebuke they fled; at the sound of your thunder they took to flight.
 The mountains rose, the valleys sank down
to the place that you appointed for them.
 May the glory of the LORD endure forever;
may the LORD rejoice in his works,
 who looks on the earth and it trembles,
who touches the mountains and they smoke!
 I will sing to the LORD as long as I live;
I will sing praise to my God while I have being.
 May my meditation be pleasing to him, for I rejoice in the LORD.