<human>: Can you summarize the given text in a few sentences?

My grandfather recently passed away. A couple months before his death, he asked if I would play taps for him at his funeral (I play the trumpet, he served in the Korean War).

I told him I would do this for him because it seemed like it was the last thing he wanted and I had no idea how I could possibly turn him down.

Now that the time has come I don't know if I can get up in front of his casket with all his family and friends there and get the notes out. I am afraid I will mess up or not be able to even begin playing. I'd feel like I failed him.

On the other hand I want to respect his last wishes and do this for him.

Only my parents and I know that he wanted this, and my parents have tried to express to me that if I don't want to do it, that it would be fine and I can just sit with everyone else while a designated serviceman "performs" it (they do it by a recording now, while someone stands and pretends to play).

I am afraid I may hate myself forever if I go on knowing I let him die thinking I was going to do something for him, only to not follow through.
<bot>: Grandfather asked me to play taps at his funeral before he passed away, and I told him I would, but now I don't know if I can do it.