Where is the poke flute song in radio soul silver?

You can find the Poké Flute song in Radio Silver, but not in Radio Soul Silver. The Poké Flute is a unique item in Pokémon Silver (not Soul Silver) and is used to awaken the Legendary Pokémon Lugia in the Whirl Islands.

The Poké Flute's tune is played on one of the radio stations in the game, but it's not associated with a specific location. You can find it by browsing through the radio channels.

Keep in mind, the Poké Flute and its song are only present in Pokémon Silver, not in Soul Silver.