In hindsight I reckon this could make an interesting double bill with Titane. Having said that, Titane is way better than this film. Though that does not mean that this movie is a bad one at all. It is just inferior in certain aspects. Not in casting the main role imho.
It's funny because I just saw her over the last few weeks in a tv show called for the people. Well in her characters mind she is doing what she is doing ... also for the people. Keeping them all in her memory ... or rather in her sound. I reckon what she goes through and what she can "hear" is not scientifically proven or right in any way shape or form - no pun intended.
There is a lot of violence here (Sound of Violence seems more fitting than Conductor, but you may feel different I reckon) and a lot of blood is being spilled. And there is the visual aspect of it all. Because it isn't just "sound", but also a visual treat - at least for the viewer.
Interesting main idea, unfortunately not as gripping or enticing as it could be. A very strange yet quite expected ending caps it all off.