simple-audio | Small Module to play audio using HTML audio tag | Audio Utils library

I actually created the project you reference. Glad you are finding it useful.

In re-factoring the project, you changed it from prototype-style JS object to an object literal. Both are viable approaches, but the object literal becomes a problem when holding the state for a particular request (the event and context fields in particular).

It also means that the prototype methods defined in the project are not available from the object literal definition. You need to instantiate SimplePlayer (by calling new SimplePlayer(event, context)) before you will get those.

If you want to understand the trade-off between these approaches better, you can read here:
Object literal vs constructor+prototype

Here is an example of working with the Alexa SDK consistent with my project. It defines the "LaunchRequest" function as a prototype function rather than simply a property: