How to make a shareable audio graphic in Adobe After Effects CS6

WNYC calls these "audiograms" — podcasters and radio-makers use them to make clips from their shows shareable on social media. My version includes an audio waveform animation, subtitles (for muted-autoplay), a photo of the person speaking, an attribution and my podcast logo. WNYC has an open-source tool for creating audiograms automatically, but doing it manually in After Effects gives you a lot more creative freedom.