Do I have to change my embouchure?

You don't have to intentionally change your embouchure, but some players find that the Wedge fine tunes theirs.

Many players have reported that after as little as one practice session on the Wedge they play better and sound better on their usual mouthpiece. This is true of players who eventually convert to the Wedge, and even in cases where they choose to stay with their regular mouthpiece for most of their playing.

It seems that the Wedge design promotes a more forward, aperture-controlled set up that translates into better performance on both mouthpieces. In this way the Wedge can be used as a teaching tool to improve the player’s embouchure.

Changing back to a conventional rim is not a problem after using the Wedge, but it can take a short time, usually a few days, to adjust back to a round, flat rim if you have been using the Wedge for a while.