Thank you Dave I have no information on upcoming breakthroughs in time travel, nor on the ability of an amplifier to speed up the tempo of a musical performance. On the much more mundane topic of the application of time domain compression/expansion in formant-based and concatenative speech synthesis, I invite you to experiment with the open source NVDA screen reader:
httP//www.nvda.org
You will discover that you can make significant changes in speech rate. G.
httP//www.nvda.org
You will discover that you can make significant changes in speech rate. G.