This is a very surprising study, here is the part on music...
"Before the close of probation, a dramatic style of music will be brought into the Seventh-day Adventist church worship. Drums will be a major part of this new music. 'Let all things be done decently and in order' (1 Corinthians 14:40) is largely being ignored in Sabbath-keeping worship services. Celebratory worship is on the increase. Perversion of worship is manifest in shouting, with drums, frivolous ditty choruses, dancing, clapping, jeering, excitement and confusion. But 'the Lord desires to have in His service order and discipline, not excitement and confusion' (Maranatha, p. 234). This perversion is connected with the close of probation, as foretold.
"The things you have described as taking place in Indiana, the Lord has shown me would take place just before the close of probation. Every uncouth thing will be demonstrated. There will be shouting, with drums, music, and dancing. The senses of rational beings will become so confused that they cannot be trusted to make right decisions. And this is called the moving of the Holy Spirit? (Selected Messages, vol. 2, p. 36). Sadly, this prophecy has long been fulfilled in the Seventh-day Adventist Church. The faithful few in the church are now calling for a true reformation. Unfortunately, few Adventists are heeding the call, but many are given to contemporary worship with its music and drums.
"Those things which have been in the past will be in the future. Satan will make music a snare by the way in which it is conducted. God calls upon His people, who have the light before them in the Word and in the Testimonies, to read and consider, and to take heed. Clear and definite instruction has been given in order that all may understand. But the itching desire to originate something new results in strange doctrines, and largely destroys the influence of those who would be a power for good if they held firm the beginning of their confidence in the truth the Lord had given them" (Selected Messages, vol. 2, p. 38).
"Singing is just as much the worship of God in a religious meeting as speaking, and any oddity or peculiarity cultivated attracts the attention of the people and destroys the serious, solemn impression which should be the result of sacred music. Anything strange and eccentric in singing detracts from the seriousness and sacredness of religious service.
"Bodily exercise profiteth little. Everything that is connected in any way with religious worship should be dignified, solemn, and impressive. God is not pleased when ministers professing to be Christ's representatives so misrepresent Christ as to throw the body into acting attitudes, making undignified and coarse gestures, unrefined, coarse gesticulations. All this amuses, and will excite the curiosity of those who wish to see strange, odd, and exciting things, but these things will not elevate the minds and hearts of those who witness them.
"The very same may be said of singing. You assume undignified attitudes. You put in all the power and volume of the voice you can. You drown the finer strains and notes of voices more musical than your own. This bodily exercise and the harsh, loud voice makes no melody to those who hear on earth and those who listen in heaven. This singing is defective and not acceptable to God as perfect, softened, sweet strains of music. There are no such exhibitions among the angels as I have sometimes seen in our meetings. Such harsh notes and gesticulations are not exhibited among the angel choir. Their singing does not grate upon the ear. It is soft and melodious and comes without this great effort I have witnessed. It is not forced and strained, requiring physical exercise" (Selected Messages, vol. 3, p. 333).
"Eternal things have little weight with the youth. Angels of God are in tears as they write in the roll the words and acts of professed Christians. Angels are hovering around yonder dwelling. The young are there assembled; there is the sound of vocal and instrumental music. Christians are gathered there, but what is that you hear? It is a song, a frivolous ditty, fit for the dance hall. Behold the pure angels gather their light closer around them, and darkness envelops those in that dwelling. The angels are moving from the scene. Sadness is upon their countenances. Behold, they are weeping. This I saw repeated a number of times all through the ranks of Sabbath-keepers" (The Voice in Speech and Song, p. 420). Must you make your guardian angel weep?
Are you attending a celebratory worship service with drums and frivolous ditty songs? If "the angels are moving from the scene," suppose ye that evil angels will hesitate to come in? Can you develop a Christ-like character needed for the final test whilst you attend worship without the pure angels? Must you be indifferent to such perversion of worship?...
http://www.warningmessage.org/mscop.htm 
