Check out this demo of Hume AI. Hume's AI voice interface detects and measures emotional signals in human speech, including rhythm, tone, and vocal cues like sighs and filler words. Hume claims its AI software can detect over 50 emotions in a person's voice, such as excitement, anxiety, and nostalgia. The company says it trained its in-house large language and text-to-speech models on data from over a million people in 30 countries. The dataset included millions of human interactions and feedback, such as reactions to videos. https://demo.hume.ai