Speech synthesis for STM32 series of microcontrollers, for Arduino IDE (stm32duino and Roger's core), ported from original source code: https://github.com/s-macke/SAM
Compatible with any STM32 board that stm32duino core support, must have PA8 pin on TIM1 CH1
The software is a reverse-engineered version of a software published more than 34 years ago by "Don't ask Software".
The company no longer exists. Any attempt to contact the original authors failed. Hence S.A.M. can be best described as Abandonware (http://en.wikipedia.org/wiki/Abandonware)
As long this is the case I cannot put my code under any specific open source software license. However the software might be used under the "Fair Use" act (https://en.wikipedia.org/wiki/FAIR_USE_Act) in the USA.