Some files have been removed from the upstream source:

 * platforms/
    Contains files used for building on other platforms. The source of a few of
    the files isn't clear (mainly osx).
 * src/compression/lha/
    The license of the original lha decompressor is non-free. The lhasa library
    is used to implement lha decompression instead.
 * src/compression/zlib/, src/compression/zziplib/generic/, src/midi/rtmidi/
    Bundled libraries. The Debian package uses libraries already found in Debian
    instead.
 * src/milkyplay/drivers/generic/rtaudio/
    Contains a number of non-free files.

 -- James Cowgill <jcowgill@debian.org>  Thu, 05 May 2016 20:57:07 +0100
