ipod touch and iphone on alpine ine r900s

[lawyerrob]

my iphone 5 works on my alpine system total control and volume - however, there is a lsight volume drop that occurs every now and again, very slight but it is there.  other than that the phone works fine via the usb connection.

Unfortunately, my ipod touch 4th generation does not work in that it does not play sound - you can control the ipod but you cant hear it.

Please fix.

[Peter__]

What version of Spotify and iOS is the iPod Touch using? 

[lawyerrob]

ipod 4th gen running 6.1.5

latest version of spotify

thanks