/usr/share/man/man3/afSetVirtualChannels.3.gz is in libaudiofile-dev 0.3.6-2+deb8u2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/afSetVirtualByteOrder.3.gz
/usr/share/man/man3/afSetVirtualByteOrder.3.gz