eSpeak NG alternatives
eSpeak NG is a free and open-source text-to-speech program available for various platforms including Android, Linux, and Windows. Utilizing formant synthesis, it provides speech output in over one hundred languages, prioritizing a small footprint and rapid processing speed. While the generated voice lacks the naturalness of systems employing recorded human speech, it offers versatility through command-line tools, libraries, and a Windows SAPI5 interface.