For recording 4 audio channels w/ the MA-200 make sure your external mic is plugged into XLR inputs 3 or 4. XLR inputs 1 or 2 on the MA-200 should not be used, otherwise the on camera mic won’t be recorded at the same time. IN the VCR setup menu choose: Audio Mode “12bit ST-1,2”. Still in the VCR setup menu, set Audio 2 to “mic”.
Behind the audio door make sure the audio 1 input is set to “mic”. This will allow the on camera mic to be recorded on channels 1 and 2. Then plug your external mic into channel 3 or 4 of the MA-200.
Make sure you’re using the audio moitor switch correctly by setting it to listen to all 4 channels at once. I used to forget to cycle through the modes for listening to the first two channels, then channels 3 and 4 , or all 4 at once.
BTW, all of this is discussed in your XL1S user manual starting on page 51. If you don’t have one you can get a PDF version at the Canon webiste.
– Don