I made a 10 Cent MCU Talk I taught a 10¢ CH32V003 RISC‑V MCU to talk. By bit-banging PWM as a DAC and using a tiny 2‑bit ADPCM decoder, I squeezed ~6–7 seconds of recognizable audio into 16 KB of flash. Then I went full retro with LPC speech synthesis (Think: Speak & Spell) using the Talkie library and a small web tool I built to generate LPC data—so this little 8‑pin chip can now play samples and ‘speak’ lots of words with only a few kilobytes. 29 October 2025