Excellent question! Exactly what needed to be asked for a venture like this. It would look particularly foolish if Aziraphale was going to jump in with no particular plan in place. Thankfully, this is something that he has already given a degree of thought to.

"I am not very familiar with it," Aziraphale answers with a strong degree of confidence. "However, I do know someone in particular that is."

Undoubtedly, he would be more than delighted to help out if this were the route the two of them were going to take.

"I thought something involving music might be enjoyable for the both of us."