On "Bittersweet," The Roots worked with Stella Artois to experiment with synesthesia. "I was only thinking of color," explained Questlove to Billboard about the track. "Let's make it light here and dark there. To discover that all your senses are effective, not just one in particular like your ears or your eyes, but all of your senses, this is really right up our alley. This is how we create music." 

The group recorded two versions of the song: Side A is based around higher tones, while Side B has lower ones. "Some people react to sweeter, non-abrasive and lighter things because it enhances their mood," continued the drummer. "When you hear your favorite song in the car, you turn it up." 

The Roots will also release a music video, which will highlight the song's relationship between sound and taste, at a future date. Listen to both versions below.