How to use the howler.Howler.noAudio function in howler

api.init = function (audioFormat) {
            if (!me.initialized) {
                throw new Error("me.audio.init() called before engine initialization.");
            }
            // if no param is given to init we use mp3 by default
            audioFormat = typeof audioFormat === "string" ? audioFormat : "mp3";
            // convert it into an array
            this.audioFormats = audioFormat.split(",");

            return !Howler.noAudio;
        };