I inserted audio in one of my Lectora title, and I chose a skin for audio player from within Lectora itself. When I view the published output on a PC, the player appears as it appeared in Lectora. However, if I view this content on an iPad, it is changed to a default audio controller of Safari browser of iPad. This leads to another issue that this default player does not have a feature of MUTE, as opposed to the one for PC has it.
I believe ‘muting’ an audio/video is not possible with iPad, as quoted in the following PDF: