Ed Cryer:
> Do the French pronounce them the same?
Yes, they do.
> How would they know that it's "ses" in the first verse, and
> "ces" in the second?
If the song were in English, would it say "its sheep" or "those
sheep", "its birds" or "those birds"? Depends on the context.
"Its sheep" (ses moutons) because they are the sea's sheep,
a part of the sea (its waves) but "those birds" because they
are not the sea's birds, but what is shown ("voyez" = "see,
look at").
Pierre Hallet (Brussels, Belgium)