How to alter voice in FCPX?

Is it possible to edit just the sound of me talking?

Voice is recorded with a microphone, connected to Canon 5D.

Do I have to use another program to get put effect on my voice? If I can´t use FCPX to do that, how can I do it?
I know I can to that with Garageband, but how do I get the audio file from FCPX to Garageband and then back to FCPX so it syncs with video of me talking?

There are plenty of sound effect plugins built in FCP X. Just scroll down the effects browser. What effect are you after?

Thanks!

I´ll look into it.

I´m not sure yet. I just need to go through the effects.

In the Effects browser, scroll down to the Audio effects. There is a whole "Voice" category of effects. You'll find everything you could need there.

I just found it. Didn´t know there were any sounds there.

Thanks!