So you are Pisces, and he is Taurus, at least as far as your Sun signs are concerned. This is usually a good match, as water and earth compliment each other. Water flows freely and needs Earth to give it shape. Earth would dry up and be a wasteland without Water. So you need each other.
The issue I have is that every planet is in a sign and house, for both of you. Also, each planet is a certain distance from the others, called aspects, and this is really important. So this is such a small percentage of astrological information, I can't tell you that much.
If you are just having a little fun, or in the beginning stages of this relationship, yes, I would say based on the two signs you gave me, you are compatible, although you knew that if you are already seeing him and it's going well.
The fact that you are both musicians and have that in common is good. His Aries Moon makes him fun to be with and a social person, as Taurus people usually don't say much unless they really have something important to say. My husband was a Taurus with an Aries Moon, and was a "Life of the Party" type of person. I'm Cancer, a water sign like you, and sometimes it's fun to be with the life of the party, and sometimes it's hard, because you have to be the sensible one.
Pisces people are very emotional and led easily, and he grounds you. You are both gentle people. You are very creative and psychic, and can read him well. You are both kind, so if you do argue, you would fight fair, and not try to be hurtful really. That's important in a relationship.
Based on this I think you would be able to have a good relationship. I just wish I had more info, because it's so little. But then I would have to cast a horoscope, and I charge for that, and can't do it from this site, I have my own. So although I want to help you, questions like this are a little frustrating, because I wish I knew more and could give a complete answer. But even if cast a chart, I can't promise a couple will be together forever. Life is hard, and we have many challenges to overcome. Astrology is complex, but life is more so, and even I can't use astrology to answer all my questions. Trust your intuition, and I have a good feeling about you two.