http://plugin.org.uk/swh-plugins/highpass_iir
http://plugin.org.uk/swh-plugins/lowpass_iir
#
+# Problematic 9 tested by Olivier Humbert (https://librazik.tuxfamily.org/)
+#
+file:///usr/lib/lv2/MonoEffect.ingen/MonoEffect.ttl
+file:///usr/lib/lv2/MonoInstrument.ingen/MonoInstrument.ttl
+file:///usr/lib/lv2/StereoEffect.ingen/StereoEffect.ttl
+file:///usr/lib/lv2/StereoInstrument.ingen/StereoInstrument.ttl
+http://example.org/raffo
+http://www.wodgod.com/newtonator/1.0
+https://sami.boukortt.com/plugins/intersect#Intersect
+https://sami.boukortt.com/plugins/intersect#SymmetricDifference
+https://sami.boukortt.com/plugins/intersect#Upmix
+http://drumkv1.sourceforge.net/lv2
+http://rakarrack.sourceforge.net/effects.html#awha
+#
# Rakarrack takes special handling to get these lv2 plugins to work;
# the library needs to be linked using -Bsymbolic-functions ;
# and there are places where there exist uninitialized data objects.