/usr/include/ClanLib-1.0/ClanLib/Sound/ is in libclanlib-dev 1.0~svn3827-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundFilters/
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundFilters/echofilter.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundFilters/fadefilter.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundFilters/inverse_echofilter.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_factory.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_raw.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_recorder.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_type.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_type_register.h
/usr/include/ClanLib-1.0/ClanLib/Sound/SoundProviders/soundprovider_wave.h
/usr/include/ClanLib-1.0/ClanLib/Sound/cd_drive.h
/usr/include/ClanLib-1.0/ClanLib/Sound/setupsound.h
/usr/include/ClanLib-1.0/ClanLib/Sound/sound.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundbuffer.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundbuffer_session.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundfilter.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundformat.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundoutput.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundoutput_description.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundprovider.h
/usr/include/ClanLib-1.0/ClanLib/Sound/soundprovider_session.h