/usr/lib/python2.7/dist-packages/xpra/sound/ is in xpra 0.17.6+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/xpra/sound/__init__.py
/usr/lib/python2.7/dist-packages/xpra/sound/gst_hacks.py
/usr/lib/python2.7/dist-packages/xpra/sound/gstreamer_util.py
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/__init__.py
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/pulseaudio_common_util.py
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/pulseaudio_none_util.py
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/pulseaudio_pactl_util.py
/usr/lib/python2.7/dist-packages/xpra/sound/pulseaudio/pulseaudio_util.py
/usr/lib/python2.7/dist-packages/xpra/sound/sink.py
/usr/lib/python2.7/dist-packages/xpra/sound/sound_pipeline.py
/usr/lib/python2.7/dist-packages/xpra/sound/src.py
/usr/lib/python2.7/dist-packages/xpra/sound/wrapper.py