Did Amazon change Alexa’s voice? 

yes, she used to sound happy when she said "ok", now she sounds depressed most of the time

My Alexa voice tonality and pitch reminds me somewhat of my voice...freaky.

We noticed that she was depressed yesterday. This is not "okay". Change her back!

A couple of mine did this last week and another one updated today. She sounds so depressing.

All of mine sound depressed!

Mine just changed a couple of days ago. I'm glad I found this thread - I thought I was going crazy.

Yes, I noticed the same thing. And she said the same thing to me when I asked her.