Install libspeexdsp-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libspeexdsp-dev
Description:
The Speex extended library development files
Speex is an audio codec especially designed for compressing voice at low bit-rates for applications such as voice over IP (VoIP). In some senses, it is meant to be complementary to the Vorbis codec which places a greater emphasis on high-quality music reproduction. . This package provides the speex extended library headers and development files.
Homepage: http://www.speex.org/
Version: 1.2~rc1.2-1ubuntu2
Section: libdevel