A common question we get about our iPhone apps is how to increase the volume of the audio pronunciations even when the volumes slider in the App itself is up to maximum.  As we all know, the iPhone has a volume button on its side.  If there is no audio playing the button only adjusts the ringer volume.  To use it to adjust the listening volume,  a sound must be playing. In the context of our Apps, that means that you need to press the volume buttons while the audio pronunciation is actually playing.

Another common issues is that having the mute switch ON (also on the side of the iPone) will so mute the sound from our Apps.