I hope this is easily resolved.

I have made a number of interviews using a Canon Vixia HF R500 camera with an external EV microphone attached. The video files on the camera are MP4 and the video and sound quality are perfect when I playback using the videocamera.

However as soon as I transfer the files to my computer, I lose the audio from the external mic and can only hear a very quiet and muffled in built mic audio (this is not sufficient as the interviews are conducted outside).

I am hoping this is only a file transfer problem that someone can help me with.

I am using Image Browser EX to transfer my files to on my PC as recommended by cannon.