libsoundtouch-ocaml-dev 0.1.7-1build5 (arm64 binary) in ubuntu bionic

 Libsoundtouch is a library that can be used to change pitch and time
 of soundfiles independently. This package provides OCaml interface to
 the C library.
 .
 This package contains all the development stuff you need to develop
 OCaml programs which use soundtouch.