Hi @raindahl
I believe you added it to the functions.php file. Because the get_field() function was called outside The Loop, you need to get the post object using the global method. Could you please try the following code?
global $post;
$music = get_field( 'music', $post->ID );
$video = get_field( 'video', $post->ID );
$set_list = get_field( 'set_list', $post->ID );
$photos = get_field( 'photos', $post->ID );
Thanks!