What note does a soprano saxophone tune to?

Match Saxophone sound with a French horns?

• usually in band when the french horns are asked to play a note and hold it so they can tune it, our band teacher sometimes ask a saxophone to play a note with them. Like to match the note. but sax and horn arent in the same key? What notes do saxes play to get the same note the french horn does? depending whatever note their trying to match obviously :P Thanks.:)

• Answer:

  C on alto is Bb on the horn. If you're reading a horn part, play one step higher than written.