+
+ if (channel > 15)
+ {
+ warning (_ ("MIDI channel wrapped around"));
+ warning (_ ("remapping modulo 16"));
+ channel = channel % 16;
+ }
+
+ channel_map[instrument] = channel;
+ return channel;
+}
+
+void
+Staff_performer::acknowledge_audio_element (Audio_element_info inf)
+{
+ /* map each context (voice) to its own track */
+ Context *c = inf.origin_contexts (this)[0];
+ string voice;
+ if (c->is_alias (ly_symbol2scm ("Voice")))
+ voice = c->id_string ();
+ SCM channel_mapping = get_property ("midiChannelMapping");
+ string str = new_instrument_string ();
+ if (!scm_is_eq (channel_mapping, ly_symbol2scm ("instrument")))
+ channel_ = get_channel (voice);
+ else if (channel_ < 0 && str.empty ())
+ channel_ = get_channel (str);
+ if (str.length ())
+ {
+ if (!scm_is_eq (channel_mapping, ly_symbol2scm ("voice")))
+ channel_ = get_channel (str);
+ set_instrument (channel_, voice);
+ set_instrument_name (voice);
+ }
+ Audio_staff *audio_staff = get_audio_staff (voice);
+ if (Audio_item *ai = dynamic_cast<Audio_item *> (inf.elem_))
+ {
+ ai->channel_ = channel_;
+ audio_staff->add_audio_item (ai);
+ }
+}
+
+Staff_performer::Midi_control_initializer::Midi_control_initializer
+(Staff_performer *performer, Audio_staff *audio_staff, int channel)
+ : performer_ (performer),
+ audio_staff_ (audio_staff),
+ channel_ (channel)
+{