A tap pauses the music, another starts it back up again.

Taking out one of the buds pauses the music.

Removing both earbuds pauses the music and it resumes when you put one back in.

One click pauses the music, two clicks skip forward a track, and three clicks revert back a track.

Still staring at the computer screen, Shirakawa grabs a remote control and pauses the music before switching on the speakerphone.