Excellent work I found nothing wrong wow talk about a voice that will blow you away (pun definitely intended )

 It happens again this lesson,

This phrasing read strange to me. It's as if you have to let us know about this time, the new lesson, but it reads forced.

Whatever that means.

This would be great in italics.

I focus my eyes on the mirror across from me

 

"my eyes" is unnecessary, because it's the only sense that focuses.  Does that make sense?  Did I spell focuses wrong?  Probably.

Papagei looks on disapprovingly

Throughout the piece, you have some amazing imagery that works fantastically.  Can you share some of that here? Show us her disapproval. 

Overall, excellent work that was a great joy to read. 

Thanks,

Amber

I squeeze out the air, focusing on the discipline she has taught me: Has taught...is that correct grammar? I've read this over so much I don't know anymore.

i believe its correct based on the sentence. 

I squeeze out the air, focusing on the discipline she had taught me. sounds okay

I squeezed out the air, focusing on the discipline she had taught me. to me it sounds like it goes againgst the flow of the narrative

I squeeze out the air, focusing on the discipline she has taught me. This one one sounds best to me.

 Hi Brittany,

   I really liked your story.  I could feel all the phsyical changes that the MC's body felt once she started singing, or if it was you, when you started singing.  You describe the sensations and reactions very vividly.  This is a very well written story, and I really don't have much to say negatively about it,

The only thing I didn't like, is the ending.  It seems to be cut short, like you didn't know how to end it.  I know you probably wrote it this way on purpose, so the reader can supply his own ending, or guess what happened, but I think the ending is too vague, if you wanted this to be published in a magazine, or anthology.  You could have the twisty ending, but just not cut if off so short. I'm trying to think of an example, but my brain is numb right now.  If you're old enough to know about the Twilight Zone, then that's the kind of ending I'm talking about.  You don't just sop in midsentence.  There is an ending, but an ending that the reader isn't expecting and has that little twist.  Well, hope this helped.  This is very well written, the ending just didn't work for me.  Sorry.

I love this, even though I’m not crazy about the concept of literally blowing people’s eardrums with their voice (it’s a little corny), but I love it for everything else. I love the first sentence; it’s great how it foreshadows the ending. I love the wording too, and the way you write. The details and descriptions are myriad and adequate; full. I read about the discipline of Madam Papagei and I feel like I’m getting real, professional voice lessons. I love that every bit of it is so detailed and precise.

“Keep your muscles tight, let the air flow through you, bring it from deep inside.”

The plot still works despite its slight corniness, cause it’s like Stephen King’s short story “The Mangler:” corny concept but once you’re in it, reading it, you’ll believe every word of it and shit your pants. I love Madame Papagei and her thick accent, and her nickname for the main character: Schatzlein. I don’t know what it means, but it’s all the more real because of that.

“Papagei looks on disapprovingly, but this time I can't stop singing. Sirens blare out of my mouth, hitting my teeth like coarse hail.”

The main character’s voice seems to have taken on a destructive life of its own, which is what makes it creepy. And unlike “The Mangler,” it’s not an inanimate object come to life but is some unknown force awakened inside a living person, which makes it creepier than “The Mangler.” And I love the ending; I like how it’s open for interpretation, which also adds to its creepiness: it’s all in the occult, the unknown. Some didn’t agree with the vague ending, but I think it’s appropriate for this story and suits it.  

 Brittany-

You've got a lot working here, I think it needs further development.  Your imagery and descriptions work for me, except...

 ...reverberate to the discordant sounds vibrating in my overzealous vocal chords.

Now, I love this line.  If you say it out loud, you can the v's and the s's(z's).  It's a great line.  But the rest of the work seems to drop this style of description.  

My stomach bulges. My sides stretch out. I feel as if I could float.

The sound shifts again. My voice grows louder. Deep inside me, I feel a barrier between my voice and something else. The air around me vibrates. I feel my insides warm as my breath raises an octave.

Above are two examples in which description is strong, but not the same style as in the first paragraph.  It is a description that isn't bad, but it doesn't stick out the way your description in the first paragraph does.  When I finished your first paragraph I was ready for a super descriptive piece, but I didn't entirely get that.  

Two possible solutions comes to me.  1.  Remove some of the word usage in the first paragraph to make the description simpler and not stick out as much.  Keep the first paragraph intriguing, but don't have it set up something that doesn't remain continuous.  Now, I wouldn't like this if it were me because I love leaving great lines in a piece I've completed.  So perhaps 2.  Develop some of the descriptions throughout the rest of the piece to keep it in line with that first paragraph.  This will maintain your voice and style while allowing you to show off your ability to craft sentences. 

For example, this line:

Sirens blare out of my mouth, hitting my teeth like coarse hail. They chatter as my lips shrink back. The mirror cracks. It dawns on me; I have run out of air. 

"...hitting my teeth like coarse hail," is a superb description, on par with that first paragraph.  Then, "The mirror cracks," and, "I have run out of air," don't follow in that same style.  These tiny changes could really give the piece a unique voice.

I think another reviewer said the idea was "corny."  Another (or maybe the same) reviewer said the ending wasn't the best.  Any corny idea can be made to work.  It's the job of a writer to get it to work.  For the most part, I think the idea was working--though I wasn't entirely aware what was going on until the ending (which I think is great)--until you ended it with "before-".  

It could be ended with a complete sentence, but still with the effect of not knowing if the speaker has died.  Maybe a description of the speaker's internal organs bursting or something to that effect.

I enjoyed the story Brittany!  You do a great job with only revealing enough information to keep the reader moving forward!

*** I read this a couple of times after reading the other comments or critiques. I agree with what most everyone had to say, except for the ending. I reread the story again, as I was going along with the incredible visuals and the mind blowing literary sounds, I realized what was meant by the way the ending took place. I also realized that I was holding my breath as you were when you wrote the piece and the ending then came into play as I started to lose consciousness. I liked the ending I felt it more than any part of the story. They say some written words can affect your heart and mind physically I agree totally especially with this piece! I think it was written very well, maybe you could continue when you are concious again...lol J/K! This was great!! Write on...***