+ void make_zero ();
+ void make_default (AudioProcessor const * processor, boost::optional<boost::filesystem::path> filename = boost::optional<boost::filesystem::path>());
+
+ void set (dcp::Channel input_channel, int output_channel, float);
+ void set (int input_channel, int output_channel, float);
+ void set (int input_channel, dcp::Channel output_channel, float);
+ float get (int input_channel, int output_channel) const;
+ float get (int input_channel, dcp::Channel output_channel) const;