Hello LD4all users!
It’s my first post here. 
I’m newbie in LD things, and I’m using WILD + WBTB 4+1 techniques to incubate LD. My question is simple: Can I use music to keep my mind busy and, with genre?
Welcome on ld4all!
About your question :
Listening to something while you fall asleep might help remaining focused. But some thing withouts too much beats is better in my opinion.
There is also some “LD tapes” where you can listen to a voice helping you to relax.
You should just try it yourself and you will have you answer soon enough
Good luck on your journey 
Thank you so much for answer, and I have one more question: When I’m using WILD, should I write my DJ? I read that this is not necessary.
Yes, you always need to keep a DJ if you want to have LD’s. A dream journal helps to make your DR better, so keeping a DJ wont help you have a WILD but if you do have one it will help you remember it. Whats the point in having an amazing LD if you don’t remember it in the morning.