I installed AMP+ to Raspberry Pi3 as described in this manual
- When I start mplayer, moc or mpd player its work fine.
- When I start internet radio on the radio station own site I hear the radio broadcast fine.
- But if I started a mp3 file or internet radio in browser, with html5 audio element, the speakers are silent.
The aplay -l get back:
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_amp], device 0: HifiBerry AMP HiFi tas5713-hifi-0 
Subdevice #0: subdevice #0
The www-data user added to audo group:
www-data : www-data audio
Could you help? What is the problem?