Actually, it doesn't look like a Muramatsu according to the shape of the crown and the keys. More like a Brannen Cooper. Look closely at 3:03... but in the end it's not the flute that makes the sound, articulation or anything - it's the person playing it. ;)
I know im flutist. I know that Muramatsu has always sponsored Galway. Anyway he has a thousand flutes. And i know that a good sound is adquried by practice. And listening a lot of recordings well made. Thats how i learn in getting a good sound. Deep and tonefull. Im obsessed with that.