Hello! This is my first post on this lovely board! Finally a place where I can talk to theatre geeks like myself!

ANYWAY..onto the actual post.

So I'm auditioning for Enjolras tomorrow, and I wouldn't mind showing off my register (Tenor, up to a C above middle C)

My plan is to sing "Goodbye" From Catch Me If You Can. I can cleanly and nicely hit the B at the end of the song, but the issue is vibrating out of the note. I don't want to voice crack towards the end, and not be given a second look, I want to be able to finish the song strongly!

Advice??

So, sorry... what's the actual question? You need help keeping your vibrato in check?

That's exactly it. Towards the end of the note I always crack/go off pitch. I need to vibrato out of the note.

If I do understand (please be forgiving, I'm dyslexic so I'm easily confused) you're saying you need to use vibrato so you don't crack. I don't think the vibrato that much to do with it. The most important thing, in my experience, is keeping the air flowing with enough power. Usual I use the most air on the first part and last part of the note so it starts easily and stops with enough power to keep it from cracking. Vibrato should just come out, watch Arron Tveit singing it live. Although it's small you can still see him exerting more energy at the end.

I think the best way to work on checking an out-of-control vibrato is to first eliminate it completely. Work on producing, first at an easier pitch, say D4 or so, a completely straight tone. Then work up by minor thirds or so until you can do a straight tone on a B4. Then, once you have that, allow a LITTLE vibrato after a beat or so of a straight tone. Work into it, and hold it only as long as you can do so within a good tone.

What worked for me is throwing the word "vibrato" completely out the window. Vibrato doesn't describe the quality that you want in a trained, "legit" voice. Vibrato implies something that you are consciously making your voice do, and what it usually ends up doing is sounding forced and strained. That strain is not going to help at all with pitch.

Another problem many singers have that causes them to crack/drift off pitch is placing the voice too far forward. Don't get me wrong - vocal projection is a good thing, especially when singing over an orchestra without mics - but forcing a note from your throat or even your upper chest, like many singers do when trying to get a high note out, just gives you an unsupported wail which is hard to control or keep on pitch.

I find that using visualizations to place your sound production works best. Think of the sound originating from your diaphragm and going straight up through your head. Keep that visualization in place, and it will subconsciously help with the tension that is causing your voice to crack. It'll also help with breath control and support. Work on breathing with your diaphragm - even when you're not singing.

Another technique I use for high notes (I'm a high C tenor as well!) is to consciously ground myself for high notes. I've seen a lot of tenors (sopranos don't seem to do this!) strain and tense every muscle in their face/head/upper body in order to get a high note out. This results in a thin, pitchy sound. When a high note is coming up, think about grounding yourself from the waist down - feet firmly on the floor, knees slightly bent, pelvis tucked under your torso - and you'll subconsciously relax your upper body, removing that strain and tension from your sound. It also puts you in a great position to take a nice, deep breath from the diaphragm to sustain any long high notes. I've found this technique really helpful as I've begun to explore the beltier, pop/rock side of my voice (I had to hit a high Bb at the very end of the night when I was in Dirty Rotten Scoundrels, and it was pretty disastrous until I made myself just RELAX!).

Hope that's helpful!

EDIT: Just realized after posting this that your audition already happened. Hope it went well! Enjrolas is an awesome part!