portaudio19-dev 19.6.0-1build1 (amd64 binary) in ubuntu focal

 PortAudio is a portable audio I/O library designed for cross-platform
 support of audio. It uses a callback mechanism to request audio
 processing. Audio can be generated in various formats, including 32
 bit floating point, and will be converted to the native format
 internally.
 .
 This package contains the development files.