Trying to play music from my Droid 2 thru speakers on 2011 Elantra GLS
 

I recently downloaded and set up an app on my Droid 2 phone called Subsonic. I have the USB cable that I use to charge my phone and load content from my computer. I tried using that to connect my phone to the audio system in the car but kept getting a "read error" on the audio screen of the car. Is there a particular cable I should be using instead of the one I am? Or is there a setting I am missing that would cause this error?

Thanks!

Yes, you can get it from the dealer or from here cheaper:
Amazon.com: Hyundai iPod Adapter Cable: Automotive

That won't help me at all. The cable you recommended came with my car. However, as stated in my question, I am trying to connect my droid 2, which is a smartphone, NOT an iPod.

Sorry, you will need a special cable but right now the only one made is for the iPod/iPhone. I don't know of one for your Droid.