Generate transcript from audio on GCS by Google Cloud speech-to-test.
Setting Up Authentication for Server to Server Production Applications | Authentication | Google Cloud
Prepare monoral flac audio file and upload is to Google Cloud Storage bucket
![FL Studio export config example](https://user-images.githubusercontent.com/4487291/62323552-83e5e100-b4e2-11e9-80ae-ac5177853a55.png)
Create monoral audio as flac.
$ bundle exec ruby script.rb gs://bucket/filename.flac
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