TTS

Text-to-Speech for Arduino

• requires an amplifier on the PWM output pin, e.g., this one
• original implementation by Clive Webster in Webbotlib
• ported to Arduino by Gabriel Petrut
• Stephen Crane modified it to use pins other than pin 10 with the help of this tutorial
• see blog articles

Text-to-Speech for ARM with DAC

• add support for ARM processors with DAC
• PWM filter not required with DAC, but still need audio amp and speaker. DACs can source only about 1 ma
• tested on Teensy 3.1, 3.5, 3.6, LC, and DUE
• Teensy forum
• separate port/hack for MBED ARM with DAC repository
• also added AVR support for Leonardo pin 5 (timer 3)