Is music supposed play in both beats flex earphones

Hello Mrich524,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you have questions about how your Beats Flex play music. Yes, the music should play in both ears if they are both inside your ears. You can find information about how your Beats Flex work in the related article at the top of the page:

"Play music

To control audio playback, use the center button on the left control module: 

• Press once to play or pause audio playback.
• Press twice to skip to the next track. Press three times to skip backward.
• Press twice and hold on the second press to scan forward through a track. Press three times and hold on the third press to scan backward through a track.

You can also pause audio by clipping your earphones together, and resume it by unclipping them."

We hope this helps.

Cheers!