On the tool bar on top click on Slide Show > Record Narration
Set the sound input device and the input source.
If you are using the Built-in microphone, select the sound input device as Built-in Microphone and set input source to Internal Microphone.
If you are using an external device, such as a headset, select the name of the headset from the list for both the sound input device and input device.
Under the Linked Narration heading ensure that Link Narrations is unchecked so that the narration is embedded into the PowerPoint file.
When ready to start recording narration click Record. Your presentation will be full screen and your recording is started.
When you come to the last slide in your presentation wait about five
seconds after your final words (don’t want to clip audio file) then
press the escape key. At this point you will be prompted “The
narrations have been saved with each slide. Do you want to save the
slide timing as well?" - select Save. Click the red exit button and you
will be prompted “Do you want to save the changes you made to your
presentation” - select Save.
Narration cannot be stopped on a particular slide. If you exit a narration and go to Slide Show > Record Narration it will always start at the beginning of the presentation.
Replacing Narration on one PowerPoint slide
After saving your recording double click the slide where you would like to replace the audio. Highlight the speaker icon and press delete.
Go to Slideshow > Slide Transition and ensure that the box "Automatically after _ seconds" is unchecked and click Apply.
Highlight the slide that you would like to record at and select Insert > Movies and Sounds > Record Sound from the menu.
Set the sound input device and the input source.
o If you are using the Built-in microphone, select the sound input device as Built-in Microphone and set input source to Internal Microphone.
o If you are using an external device, such as a Headset, select the name of the headset from the list for both the sound input device and input device
Click on the Record button to begin recording and use either the Pause or Stop button to complete your recording. Use the Play button to play back your recording if desired. When the recording is complete, click Save.
To sync the newly recorded sound with the slide, click on the speaker icon and go to Slideshow > Custom Animation. Ensure that Media is selected in the "Select to animate box". Click on Add Effect and select Play from the list and With Previous as the Start action. Click OK to select the effect and OK to assign the effect to the sound.
Some tips for recording narration on a PowerPoint slide
When recording narration to a laptop there will be a built in microphone, no external microphone is necessary.
As you are going through your slides you can get up and move around, try not to have your back to the laptop when speaking
Try
and finish your sentence before you advance your slide. If you are
speaking when you change slides your audio may be clipped somewhat.