Stereo to binaural conversion

```
http://www.naivesoftware.com/software.html

-> It's a crossfeed plugin for foobar2000.

http://bs2b.sourceforge.net/

-> It's a crossfeed plugin for foobar2000 too, but little different.

The latter contains the source code, but reduces treble too much. For me, the 
former is better. :-) 
```

Original issue reported on code.google.com by `yamamoto2002@gmail.com` on 6 Jun 2013 at 12:52
