Sound cuts out?

Just purchased Knytt Underground on Steam.  Everything works well until ~10-15 minutes in when the sound cuts out.  I think it happens when I transfer between rooms but it's all sound, not just the ambient.

I'm running Win10, steam version of game.  Not changed any config files but, for the record:

alsoft.conf:
[general]
resampler = cubic
sample-type = float32

Game.ini:
[General]
Version=1.2.1
Portable Mode=1
Use Steam API=1
Achievement System=Steam

[Application Data Paths]
MMF2 Windows=Nifflas\Knytt Underground
Chowdren Windows=Nifflas/Knytt Underground
Chowdren OS X=Nifflas/Knytt Underground
Chowdren Linux=.Nifflas/Knytt Underground

Is there a log file somewhere that might help identify the issue?  I couldn't find anything.

This is an odd issue that should not be happening. Sounds like a devicedriver crash. Does the same happen if you reboot? and is it consistent that everytime after 10-15 minutes the sound stops? Or did it happen just once?

It was consistent but it looks like a reboot cleared it up.  Don't have a particularly high opinion of Win10 at the moment.  Seems to like breaking in interesting ways.

Thanks for the help.