I'm a cheapo, I'd use a ch32v003 an stm8 or a modern attiny ;) or maybe a stm32 with 128k of flash and a dac and would compress the audio.. much more choices no

I'm a cheapo, I'd use a ch32v003 an stm8 or a modern attiny ;) or maybe a stm32 with 128k of flash and a dac and would compress the audio.. much more choices now ! Speech synthesis on a cheap mcu would be awesome