From Onkyo Sound & Vision Corporation:
The Onkyo Remote Control App is an official Onkyo application for iPhone/iPod touch letting you intuitively operate Onkyo network A/V products. Available as a free download, it is compatible with all network-capable Onkyo A/V receivers as well as some network-ready produts released during or after 2010.Functions Enabled by Onkyo Remote2(1) Internet radio operation. Stations are touchscreen selectable, with no need to view a TV display;(2) Control of streaming audio files from a DLNA-compatible server. Your iPhone/iPod touch can be used to select music directly from the server;(3) General remote control and playback functions;(4) Volume-control function;(5) Information including station frequency displayed when listening to radio. (Note: available only on A/V products with a built-in radio tuner);(6) Stream music stored on iPod touch/iPhone wirelessly. (Added capability to play music stored on compatible iPod touch/iPhone models on 2012-model Network AV Receivers.)(7) Compatible with Spotify (depends on region)(8) FLAC, DSD, and Apple Lossless playback capability via Home Media Function (depends on model)Compatible iPhone/iPod touch Models: iPhone 3GS or later, running iOS 5.0 or later; iPod touch 3rd generation or later.Compatible Onkyo Products:All Network A/V Receivers released in 2010 - 2014.T-4070 Network TunerCR-N755 Network Hi-Fi Mini SystemTX-8050 Network Stereo Receiver(All models require a firmware update.)Enjoy the new world of audio convenience with this free app.