Just in case text pronunciation isn't enough for someone, here's "Casascius" from Mike Caldwell himself:
(skip to 1:40) https://bit.tube/play?hash=QmQNyDDAJM63Byb7kp93KGzueLdYKSbnwahKM6wvGvp7Tj&channel=65218

Great source.
From what I hear, Mike Caldwell pronounces it "ka-say-cious", where the last "cious" sounds similar to the "cious" in "delicious".

and SCIUS as in luscious Wink

Ah I overread that, you already had it figured out a few posts ago. Shocked