Merge branch 'feature/timestretch'

diff --cc .circleci/config.yml
index 8df0d15,6493e26..6db2ef8
--- 1/.circleci/config.yml
--- 2/.circleci/config.yml
+++ b/.circleci/config.yml
@@@ -2,7 -2,7 +2,7 @@@ apt-run: &apt-instal
    name: Install apt packages
    command: |
      sudo apt-get update
-     sudo apt-get -y install make sox pkg-config libavcodec-dev libavformat-dev libavresample-dev libavutil-dev libsndfile1-dev libsamplerate-dev libvorbis-dev libflac-dev
 -    sudo apt-get -y install make sox pkg-config libavcodec-dev libavformat-dev libavresample-dev libavutil-dev libsndfile1-dev libsamplerate-dev librubberband-dev
++    sudo apt-get -y install make sox pkg-config libavcodec-dev libavformat-dev libavresample-dev libavutil-dev libsndfile1-dev libsamplerate-dev librubberband-dev libvorbis-dev libflac-dev
  
  pip-install: &pip-install
    name: Install pip dependencies

diff --cc .travis.yml
index 73b097f,971c0ee..c27f275
--- 1/.travis.yml
--- 2/.travis.yml
+++ b/.travis.yml
@@@ -82,8 -81,8 +83,10 @@@ addons
      - sox
      - ffmpeg
      - libsndfile
 +    - libvorbis
 +    - flac
+     - libsamplerate
+     - rubberband
      - lcov
      update: true
  

diff --cc azure-pipelines.yml
Simple merge

diff --cc src/wscript_build
Simple merge

diff --cc wscript
Simple merge