You may have to submit a PowerPoint file with narration as an assignment.
Try this technique to record your audio (the settings tools will test your audio is OK). PowerPoint Narration – YouTube
Don’t link the narration file – it needs to be embedded. Radio quality is more than good enough.
If you have problems with your PC sound settings, this may help: Sound Settings – YouTube
If you are using Windows 2010 and later it is possible to export your narrated presentation as a video: Microsoft Guide
Once you have a .wmv file this can be uploaded through MyMedia
If you continue to have problems with your PC, please visit the PC Help Desk in Grendon – these guys are the experts!