There is a text-to-speech library (TTS) that works on the arduino with either pin 5 or 9 in analog mode hooked to the synth speaker. seehttps://github.com/manitou48/TTSit produces a robot-like voice. for a fancier and more expensive solution, you might wire up an emic 2https://www.sparkfun.com/products/11711
Hiya @manitou This sounds awesome! Any chance you could share a short demo vid?