Warning: Some of this post is going to come across as a little harsh, but everything I say, I say because I want to help. Anything that I say bluntly, I say it that way because I think that hearing it the most straightforward way possible is the best way I can help.
Let's get some perspective here. You married a woman who doesn't share your taste in music and, presumably, love her anyway. You love your child, and you will continue to love your child even if they don't end up sharing your taste in music or even your love of music. That isn't the exact outcome you want, but it's extremely rare for parents to have children do exactly what they want.
Reading through the question and your comments here, it's clear that this is no longer about your child and has become a conflict between you and your wife with your child caught in the middle. This situation is not good for anyone, and the most likely outcome from it is damage to the relationship between all three of you. Stop and ask yourself which is worse: if your child has a mild distaste for your music or if they resent you and your music over this conflict. You need to change your goal immediately: put aside your dreams of influencing your child's musical taste and put everything into removing this conflict from your home.
Start by apologizing to your wife. Sincerely. Do not make a single excuse for your behavior. This is going to be really, really hard, but you need to do it before this escalates any further. Think of anything you've done wrong with this and tell her you're sorry for doing it (and mean it). Only you know exactly what you've done, but here are a couple things to start your list:
- Insulting her choice of music
- Trying to make her child dislike the music she likes (that is, trying to take away a possible bond they could form)
- Treating your child as a means to fulfill your own desires instead of as an individual who may or may not end up sharing your interests
I'm sure there's more, but you'll need to fill in those details yourself.
Once you've apologized, your wife may or may not apologize back. It doesn't matter which happens. Remember: your goal here is to end the conflict and restore the relationships in your home, not to get your wife to admit to any wrongdoing. You have done something wrong here, and even though your wife probably has, too, your own actions disqualify you from making an issue of anything she's done. (Note that "making an issue" of your spouse's wrongs is generally not an appropriate or effective way of solving problems even when you haven't done anything wrong.) You need to completely and unconditionally forgive her to accomplish the goal, and that means not trying to leverage anything she's done wrong against her.
Once you've apologized, now you can discuss the root cause of your actions and what to do from here with her. You may need to do some soul searching to figure out why it's so important to you that your child shares your taste in music. But regardless, talk with her about it, and maybe you two can come to an agreement about how you can both share your music with your child.