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# ADPCM CODEC
ref: 1, 2
# RESOURCES
1. [wikipedia: adpcm](https://en.wikipedia.org/wiki/Adaptive_differential_pulse-code_modulation)
2. [st-micro: an3413](https://www.st.com/resource/en/application_note/an3143-audio-software-codec-for-the-stm8s-stmicroelectronics.pdf)
3. [st-micro: an4453](file:///home/lex/Downloads/an4453-implementing-the-adpcm-algorithm-in-stm32l1xx-microcontrollers-stmicroelectronics.pdf)