See Psalms 33:2-3.
O God. — The only instance of Elohim in the last two books of the psalter with the exception of Psalms 108, which is a compilation from two older songs.
Related Commentaries of Psalms 144:9
Psalms 144:9
9 I will sing a new song unto thee, O God: upon a psaltery and an instrument of ten strings will I sing praises unto thee.