This is a Heroku buildpack for using wav2json in your project.
To use this buildpack, you should prepare a .buildpacks file that contains this buildpack url and your real buildpack url:
$ ls
.buildpacks
$ cat .buildpacks
https://github.com/crwang/wav2json-heroku-buildpack
You can verify that wav2json is installed by calling:
$ heroku run "wav2json"