What is the soundtrack (probably violin) that plays in episode 47 of Hunter x Hunter 1999 when Gon receives Ging's tape?
Anime & Manga Stack Exchange is a question and answer site for anime and manga fans. It only takes a minute to sign up.Sign up to join this community
If you are talking about the music that is playing in the background while the tape recording of his father is being played then it's not a violin but a harmonica.
It is the harmonica version of the song "Ohayou" (Composed by Keno) which is part of the soundtrack in the first anime adaptation of Hunter x Hunter.
You can listen to it on youtube