So, now, you can watch Truffaut's wonderful, lively shots of Paris' boulevards and buildings, the cinematic rush towards the Eiffel Tower, soundtracked by Masaru Sato's funeral dirge. And you can see Kurosawa's ominous smoke and landscapes, his premonitions of death, brutality, and desolation, set to Jean Constantin's lilting, romantic, whimsical theme.
I had to trim the Throne of Blood opening by a few minutes to match the music from The 400 Blows - this entailed chopping out most of the opening credit cards (which are all just white text on black background), and removing a few lingering shots of smoke drifting across ashen plains.
Watch both the videos below, and feel free to leave any feedback for suggestions for future sound experiments in the comments section.
p.s. - You really should own both these movies on Criterion blu ray. There's a ton of great features and the picture is fantastic. Check out Throne of Blood and The 400 Blows on the Criterion website.