Building Google Cloud Platform Solutions

How to do it...

First, we'll record the voice which needs to be transcribed in FLAC format. Then, we'll use a Python program to invoke the Speech API and get the transcribed response:

1. Navigate to the Chapter20/speech-api  folder.
2. If you are on a Linux-based operating system, install the SoX package:

$ sudo apt-get install sox

Or for CentOS:

$ sudo yum install sox

3. Next, using the rec command, we can record the message which needs to be transcribed:

$ rec -c 1 -r 16000 record.flac trim 0 3

The preceding command will record an audio message for 3 seconds with a sample rate of 16000 Hz.

4. To execute the program in an isolated environment, create a virtualenv and install the dependent packages:

$ virtualenv ENV$ source ENV/bin/activate$ pip ...