Stentor

Planet located outside Federation space, inhabited by the Stentorians. In ages past, it suffered a devastating planetary war, and the survivors renounced violence. It was known for the Stentorian flute tree, a plant which produced a calming flute-like sound when the wind blew through it's cones.

In 2291, the USS Excelsior (NCC-2000) under the command of Hikaru Sulu, visited the planet to determine the source of subspace radio interference being broadcast across the region. Upon arriving, their communication systems were also overwhelmed.

A giant tower broadcasting subspace signals as a form pirate radio was the source of the transmissions. A religious rebel was using it to criticize Stentorian society. Captain Sulu resolved the crisis by bringing about a change in his perspective, despite the Prime Directive, which proved controversial.