I have an Ipad2 that all the other applications involving sound work, but morphwiz stopped putting out sound. It launches, shows graphic interface and functions that way, but no sound. Manually shut off all other applications, still nothing.
Check the mute switch. This is the switch on the side next to the volume rocker switch. Most apps ignore it, but MorphWiz pays attention to it. So, even though the iPod app and other music apps may be putting out sound, the mute might still be on.