The anti's (non-instrumentalist) are all in "one accord" in call for New Testament authority for the use of instrumental music. Here they would have us believe that the Old Testament, wherein various instruments were commonly used in the praise and worship of the Lord, has no bearing upon the matter.
The fact is, the only scriptures used during the ministry of Jesus and the early church were the Old Testament Scriptures, and they are often quoted and referred to. Look up the word "scriptures" or "as it is written" in a Bible concordance and you will see it used many times by the New Testament writers.
Thus, it is a gross error to assert that everything in the Old Testament is somehow "abrogated," or has no application to us now (See 2 Timothy 3:15; Romans 15:4; 1 Cor. 9:9,10; Acts 24:14).
Since instrumental music has the Old Testament precedent of being approved of God ("musical instruments of God" 1 Chronicles 16:42), and there is no evidence that there was a time when this approval ceased, we have biblical authority for its validity.
We are authorized to use “psalms” in the NT (Ephesians 5:19; Colossians 3:16). Ephesians 5:19 says "..speaking to one another with psalms, hymns and spiritual songs.." and correspondingly Colossians 3:16 says to, "..admonish one another with psalms, hymns and spiritual songs." The word "psalm" in the Greek dictionary, definition (#5568): "A set piece of music, i.e. a sacred ode (accompanied with the voice, harp, or other instrument)." The root word of psalm means "to twitch, twang or pluck," such as pluck a string of a musical instrument."
Strong's Concordance
psalmos: a striking (of musical strings), a psalm
Original Word: ψαλμός, οῦ, ὁ
Part of Speech: Noun, Masculine
Transliteration: psalmos
Phonetic Spelling: (psal-mos')
Short Definition: a psalm
Definition: a psalm, song of praise, the Hebrew book of Psalms.
HELPS Word-studies
5568 psalmós – a psalm ("Scripture set to music"). Originally, a psalm (5568 /psalmós) was sung and accompanied by a plucked musical instrument (typically a harp), especially the OT Psalms.
[The Psalms of the OT were often sung and were accompanied by sophisticated musical arrangements].
NAS Exhaustive Concordance
Word Origin
from psalló
Definition
a striking (of musical strings), a psalm
NASB Translation
Psalm (1), psalm (1), Psalms (3), psalms (2).
The words "making melody" are used in Ephesians 5:19, but "how" this is done is found in Isaiah 23:16, and it is with a musical instrument: "Take an harp, go about the city, thou harlot that hast been forgotten; make sweet melody, sing many songs, that thou mayest be remembered."
Also, Amos 5:23 speaks of "the melody of thy viols," which is also reference to a musical instrument. So if "the Bible interprets itself," these passages show "how" to make melody – with musical instruments.