Let me briefly quote the First Antiphon of the Divine Liturgy of St. John Chrysostom and St. Basil the Great:

Bless the Lord, O my soul: Blessed art Thou, O Lord. Bless the Lord, O my soul; and all that is within me bless his Holy Name. Bless the Lord, O my soul, and not forget all His benefits. Who forgiveth all thy sin, and healeth all thine infirmities. The Lord is full of compassion and mercy, long-suffering and of great goodness. He will not alway be chiding, neither keepeth He His wrath forever. He hath not dealt with us after our sins, nor rewarded us according to our iniquities.

Perhaps these words, or words like these, are familiar to you. (They are taken from Psalm 103:1-10.) They undoubtedly refer to the grace of God in saving us from the punishment we deserve. But more than that, in this psalm David adumbrates the character of a God who is gracious in all he does. He gives rain to the wicked and the righteous, and illuminates the whole creation with his glory. He creates us, fallen as we are, as capable of beauty and truth.

It is this grace of God that is shown in Genesis 4:22. Barely a sentence after the curse on Cain comes this news of Cain’s descendant Jubal: “He was the father of all who handle the harp and pipe.” It is a breath of fresh air in the otherwise suffocating tale of the Curse being worked out through mankind. (The immediate aftermath of the Fall is filled with these little graces of God.)

Not too long after Jubal would come another harp-player: David, son of Jesse, who wrote Psalm 103 and marvelled at God’s grace.

On that note, let me recommend to you Liturgy.ru. There is a wonderful collection of high-quality choral music there, free to download. The beauty of the music is a call to worship the God who has been so gracious to us.