I am a committed Yamaha enthusiast for audio equipment. But this app is a dumpster fire. I bought a MusicCast reciever and the app asks for a CONNECT button on the receiver. I looked for 20 minutes there is no connect button on this machine nor is there a connect button indicated anywhere in the manual. After careful consideration I've concluded that there is no connect button on this music cast amp even though it has the words music cast amp printed on it therefore the app sucks.