Synology Inc. releases DS audio v5.17.0
iPhone, iPad / Tools / Controllers: You must own a Synology NAS to run this app, and be running the Audio Station 6.5.0 package to get the complete set of features DS audio allows you to stream music stored on your DiskStation with an iPhone/iPad wherever an Internet connection is available....
www.440audio.com/en/software/vi5941-Synology-Inc-DS-audio/