You can listen to media through your phone's or car's speakers with Android Auto. You can find your compatible music, audiobook, and podcast apps when you select the app launcher 
During setup, you’ll see all of your compatible media apps in Android Auto. Select media you'd like to listen to by selecting the app launcher
Make sure you're signed into that app on your phone. For more information or to troubleshoot these apps, visit the app’s website or contact the developer directly.
Listen to music
Listen to YouTube Music with the display- On your display, select the app launcher
You Tube Music
.
- Once you're in YouTube Music, select Menu
.
- Choose from the following:
- Your Mixtape.
- Recommended.
- Last played.
- Library.
- Downloads.
You Tube Music 
. 
. Tip: This option only appears after you download a track in the YouTube Music App.
- Say "OK Google" or select the microphone
.
- Say “Play music.”
.Some examples of things you can say are:
- "Play my 'Dance!' playlist on Spotify."
- "Play Call Me Maybe on Amazon Music."
- "Play house music on Pandora."
- "Play Harry Potter on Audible."
- "Play Adele Radio on iHeartRadio."
- "Play Planet Money on NPR One."
Listen to podcasts with Google Podcasts
Important: Use your phone to manage your podcasts, and to find, download, and queue episodes for your trip.
- On your display, select the app launcher
.
- Choose from the following:
- New episodes: new episodes from your subscriptions
- Your queue: episodes in your queue
- Downloads: episodes downloaded to your device
- History: episodes you have in progress or completed
- Subscriptions: podcasts you subscribe to
- Explore: personalized episode recommendations
- Select an episode.
.- Say "Ok Google" or select the microphone
- Say a command like:
- "Listen to [podcast name]."
- "Play [podcast name]."
- "Listen to the latest episode of [podcast name]."
- "Listen to a comedy podcast."
- On your display, select the app launcher
- Select Subscriptions.