JAWS-UG KANSAI Re:Boot meetup
Deep diving to the Alexa Audio Player Interface.
https://developer.amazon.com/en-US/docs/alexa/custom-skills/audioplayer-interface-reference.html
https://voicelunchjp.connpass.com/event/191516/
https://github.com/jaws-ug-kobe/alexa-summer-memory