You may have changes modes.
See Modes section in the User Guide at http://anytune.us/ios-user-guide/ios-controls/.
Anytune has several modes that present you with controls and visualizations for a specific task including Play
On iPhone:
The Mode button is to the far right of the Play Button and looks like
with the current mode on it. Tap the Mode button and Choose your desired mode. Tap it again and select the Play
or other mode.
On the iPad:
You select the mode with the four buttons to right and up one row from the volume button:
The blue button is active.
Or reveal additional controls by tapping the
or
buttons between the Tempo and Pitch sliders.