Airplane Mode: . Always go into Airplane Mode, to avoid unwanted interruptions such as phone calls, text message and other notification alerts.
WIFI: Make sure you really are connected to WIFI. Public WIFI can appear as if you are connected, but until you accept the terms or login on a web page, you are not and will not be able to browse or download.
Sound Levels: Adjust volume levels on your phone/tablet by setting the volume to one or two clicks below maximum volume (about 80% or so.) . Then adjust the volume on the stereo or sound system in the club to make sure you have enough volume. This will help avoid any distortion that can happen between your device and the sound system.
Playing full album vs just a sample clip: Remember, you always want to be in the Tempo Player view to play the album in class and not from the album summary page, which only gives a preview clip.