Anon is correct, it is the seductive voice of satan and to encourage in committing evil deeds while making you waste precious time worthy of Dhikr, Remembrance of Allah and satan wants you to forget Allah the reason why music is bad and wants you to waste your time doing nothing or something that is not beneficial to your afterlife and something not beneficial in gaining the rewards of Allah.
Music only makes you forget the Remembrance of Allah, and will encourage you to NOT be God-conscious and so forth.
Yet people still like their music somehow.
I also agree with kyle, it does something perverted-like and harming the human soul with satanic sounds instead of Allah's Holy Wise Quran being recited which benefits the human soul and feeds the soul while music has no benefits except in corrupting the soul.
Satan wants nothing but for you to NOT benefit anything in this life by enticing you with committing sins and NOT benefit anything for the afterlife either by encouraging you to be very far away from Allah, forget Allah, waste your time on nothingness through his evil whispers suggestions and through evil means such as music, drinking, dancing, committing adultery, worshiping false gods or even worshiping the devil himself, committing murder, etc.
Satan wants man to do all these things and will encourage until someone does listen to his evil whispers and does commit the sins especially through music. Satan will continue enticing all of mankind until they do go to hell without having repented before anything is too late and until man feels hopeless. So that man may continue doing more evil, heavy sins because he feels hopeless & having committing whatever sins.
Filthy, sinful criminal people commit heinous crimes through music as they murder innocent people or having an affair while playing music or music in nightclubs.
All these filthy sins, filthy crimes and deception, entertainment or the desires, doesn't help man benefit anything from his Lord by committing these sins; it only makes man feel depressed and will never find peace, will never find satisfaction and real contentment by doing things that don't benefit him whatsoever by disobeying Allah and only accumulating nothing but sins.
The reason why Allah forbids something or many things is because Allah knows what is harmful to His creation and what is harmful to society. There is no secret why Allah forbids to enjoy some of the pleasures of this world that only corrupts man and one that leads him to a dark path that doesn't lead to real success except a vicious, ugly, depressing, unsatisfactory cycle.
Allah Himself says that what He has for man is far superior and far better than some of the alluring pleasures or the luxuries of this world.
Allah Himself encourages His believing servant to turn away from things that allure, that entice or seduce mankind and that those temporary pleasurable luxuries is no good for him except what Allah has for His servant in the afterlife is indeed grand, pure, eternal and truly rewarding.
Allah Himself says this temporary world with its temporary alluring luxuries that may be pleasing or desirable is nothing but a mirage, false hopes, and that this is not what Allah promises His believing servants. Its only a distraction that wastes your time and its for those who disbelieve in the last Day, who disbelieve in Allah's promises because Allah is testing all of mankind with these pathetic, temporary desires.
In the end, you have a choice...either you choose your Allah, you hold onto your Allah, you keep away from the temptations of this world until day of Judgement OR you follow your desires, you choose this temporary world that will never satisfy you and will never help you progress towards anything or anything to gain for the afterlife.
Unfortunately, some people choose their desires over Allah and they will never be happy in this world so long as they are turning away from Allah and disobeying Allah and should they never repent to Allah & never turn back to Allah, they will face the severe consequences and will pay the price for choosing their desires over Allah and for choosing the desires just to forget Allah.