AirPlay no sound from iPad to Airport Express

I has an Airport Express with last updated and correctly installed. I wanted to listen to an album on my HiFi system, so I opened iPod app on my iPad and tried to stream via AirPlay, but no sound comes out. Airplay Icon displays and is selected, time is counting, but no sound. Works perfectly from MacBook and iPhone, but not iPad.How to fix this issue* Tap Settings > General > Reset > Reset