Bit of a complex question this. I have a Microsoft Groove music account that lets me download and stream unlimited music. The content that is downloaded is DRMed unless I buy the music outside of the normal subscription fee. I want to be able to play this in my S4 and I can't download to a USB stick as the content won't play anyway due to DRM. My thinking was i could get an iPod touch (3rd gen) install the Groove app, sync the music I want down and play through the MMI connnector. My question is will the MMI iPod sync mechanism be able to expose the Groove music collection through the MMI so I can control it through the car controls. I'm sure iTunes music would be playable but would Groove music. Is anybody doing anything similar with Spotify for instance?