You are recording with a monaural microphone, which will only record to one (usually the right) channel.
Short of getting a stereo microphone, the easiest solution is to add the audio effect Fill Left (or Fill Right) to the clip on your timeline. This will spread the audio evenly across both stereo channels.
Is the Audio a separate file, or is it being muxed (Multiplexed) to provide the Audio stream along with the Video stream?
In G-Spot, or MediaInfo, is the Audio signal being shown as 2-channel (stereo), or 1-channel (mono)?
If 2-channel, is the Balance changed in any way?
I am using a stereo microphone in the analog port but for some reason PE8 does not reqognize that . Your suggestion to use fill in left (or right) works well. The quality of the sound is OK so I will use that solution.
Thanks for your advise.