There is a small switch on the
edge of the iPad. This switch can be used to lock rotation or mute audio (the
settings to change that are in the iPad settings).
It sounds like yours might be
set to mute audio. This switch doesn't affect the output of any media played from the iPhoto library. It does however, control the audio output from Avid Studio.
In other words, Avid Studio respects the switch setting.
Please try sliding the switch to
the on position and let me know if this works.