Install libopencore-amrnb0 by entering the following commands in the terminal:
sudo apt update sudo apt install libopencore-amrnb0
Adaptive Multi Rate speech codec - shared library
This library contains an implementation of the 3GPP TS 26.073 specification for the Adaptive Multi Rate (AMR) speech codec. The implementation is derived from the OpenCORE framework, part of the Google Android project. . This package contains the encoder/decoder shared library.