A short-ish video on how you can transcribe speech audio to text using an Azure Function and Cognitive Services.  Based on a real world scenario from a customer proof of concept, Azure Functions and Cognitive Services were used to allow field employees to annotate inspection reports with voice dictation so observations could be categorized, searched, and reported on.

Link to source code:

Source Code

Links to more information on Azure Functions:

Azure Function Overview

Video: Azure Friday and Chris Anderson - Azure Functions

Links to more information on Cognitive Services:

Cognitive Services Home

Cognitive Services Speech API