I found this info in post.
[QUOTE=Ashley] Browser sound support is pretty buggy at the moment - it should improve soon.
Are you on 64-bit Windows? If you visit Java.com in a 32-bit browser it installs the 32-bit Java... but Construct 2 looks for the 64-bit Java. You can install 64-bit Java here. (Bit of a silly situation, but not sure there's anything we can do.)[/QUOTE]
Does this mean to install java 64 and then export again?
You can't make apps for 32bit browser's on a 64bit system?
quote's post URL=http://www.scirra.com/forum/minify-on-export-sound-inquiries_topic44708.html