C´est bon, j´ai trouver...
The trick is to reproduce the same sound you hear in that room in the room
with the big column. Here is the answer to the puzzle :
- Blast 4 times the red column
- Blast 3 times the blue column
- Blast 1 time the green column
( Source : http://db.gamefaqs.com/coonsole/ps2/file/xenosaga_f.txt )