You don't have to shout. With its multiple microphones Alexa is pretty good at hearing you over the music. There is also a remote with a built in mic in case you want to control it from a ways off or there is a ton of background noise.
Sadly you cannot change the wake word. 'Alexa' or 'Amazon' are the two available wake words.
Sadly you cannot change the wake word. 'Alexa' or 'Amazon' are the two available wake words.