After thorough research, I couldn't find any information on an artist or group named "Impostor Orchestra." It's possible that the name refers to a specific project, album, or ensemble associated with another artist. For instance, Jimi Tenor released an album titled "EXOCOSMOS" featuring the Impostor Orchestra in 2013. ([music.apple.com](https://music.apple.com/us/album/exocosmos-feat-impostor-orchestra/641822251?utm_source=openai)) Additionally, Béla Fleck composed a banjo concerto named "The Impostor," which he performed with the Nashville Symphony. ([en.wikipedia.org](https://en.wikipedia.org/wiki/The_Impostor_%28Banjo_Concerto%29?utm_source=openai)) If you have more context or specific details about the "Impostor Orchestra" you're referring to, please provide them, and I'll be glad to assist further.