+ /* monitor-section has same number of channels as master-bus (on creation).
+ *
+ * There is no clear answer what should happen when trying to PFL or AFL
+ * a track that has more channels (bufs_audio from source-track is
+ * larger than mixbufs).
+ *
+ * There are two options:
+ * 1: discard additional channels (current)
+ * OR
+ * 2: require the monitor-section to have at least as many channels
+ * as the largest count of any route
+ */
+ //assert (mixbufs.available().get (DataType::AUDIO) >= bufs_audio);