Wikipedia: Wikimedia Foundation, Inc.: The Evolution of Computer Voices: From Beeps to Human-Like Speech

Summary

Imagine a computer that can speak not just words, but with emotion and natural cadence. That's the journey of speech synthesis, the technology turning text into spoken audio. Early attempts in the 18th century used mechanical models of the vocal tract, while the 20th century brought us the vocoder and early electronic synthesizers like Bell Labs' Voder. Today, sophisticated AI, especially deep learning, has revolutionized this field. Systems like Google's WaveNet and Tacotron 2, and Microsoft's FastSpeech, can generate highly natural speech, sometimes requiring only seconds of audio to clone a voice. This technology powers accessibility tools for the visually impaired, creates audiobooks, and even assists those who have lost their voices. However, advancements also raise concerns about misuse, such as deepfake audio for fraud. The quality of synthesized speech is now measured by its naturalness and intelligibility, with ongoing research focusing on improving emotional expression and prosody.