At Southside Christian Fellowship, we use the shofar during celebratory worship. We do not believe there is anything mystical or magical about the shofar. We simply are using it as an expression of worship; During the blowing of the shofar there can be very distinct sounds:
Tekiah is the sound of the King's coronation. And now, the shofar proclaims to ourselves and to the world: God is our King. It isn't enough that Christ is MY King alone. If ALL humanity doesn't recognize Christ as King, then there is something lacking in my own relationship with the Father. Part of my love for Jesus is to help guide all people to an appreciation of Him.
Shevarim - three medium, wailing blasts - is the sobbing heart, yearning to connect and to grow. Every Christian has the potential to change and be great. This can be accomplished much faster than you ever dreamed of. Don't let yourself be constrained by the past. You know you have enormous potential. At the moment the shofar is blown, we cry out to God from the depths of the soul. This is the moment when our souls stand before the Almighty in an open heaven.
Teruah - nine quick blasts in short succession - resembles an alarm clock, arousing us from our spiritual slumber. The shofar brings clarity, alertness, and focus to our call as Christians. God wants us to make an honest effort to maximize and utilize the gifts He gave us. You aren't expected to be anything you're not. But you can't hoodwink God, either.
The shofar was sounded:
and...
At the return of Jesus, the Messiah. "For the Lord Himself will descend from heaven with a shout, with a voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus, we shall always be with the Lord. Therefore comfort one another with these words." (I Thessalonians 4:16-18 NKJV)