Thank you for the reply! ? so I used the same settings as you mentioned for export. This is a really weird issue. The only changes I have made are to update my programs. It has worked perfectly in the past. I use WeTransfer to send the files. The thing is it works on different media players on different PCs. QuickTime and VLC media player on 2 different PCs no issues ?♀️ But then on two different phones, when you download the video onto your phone and use the native IOS app, the audio becomes progressively out of sync and when you skip forward the audio won’t play at all for 3-4 seconds ?♀️ And if you try to save a clip of the video there is no sound at all. I have never seen this and have no idea what to do about it ?