digraph {
  rankdir = "LR"
  subgraph cluster_subunit_audio_0 {
    label = "audio subunit 0"
    subgraph cluster_subunit_audio_0_input {
      label = "input"
    subunit_0 [label = "ASU Audio Input 1394 1/2 (IsoStream)", shape = "ellipse"]
    subunit_1 [label = "ASU Audio Input 1394 3/4 (IsoStream)", shape = "ellipse"]
    subunit_2 [label = "ASU Audio Input 1394 5/6 (IsoStream)", shape = "ellipse"]
    subunit_3 [label = "ASU Audio Input 1394 7/8 (IsoStream)", shape = "ellipse"]
    }
    subgraph cluster_subunit_audio_0_output {
      label = "output"
    subunit_4 [label = "ASU Audio Output Ext 1/2 (IsoStream)", shape = "ellipse"]
    subunit_5 [label = "ASU Audio Output Ext 3/4 (IsoStream)", shape = "ellipse"]
    subunit_6 [label = "ASU Audio Output Ext 5/6 (IsoStream)", shape = "ellipse"]
    subunit_7 [label = "ASU Audio Output Ext 7/8 (IsoStream)", shape = "ellipse"]
    }
  }
  subgraph cluster_subunit_music_0 {
    label = "music subunit 0"
    subgraph cluster_subunit_music_0_input {
      label = "input"
    subunit_8 [label = "MSU Compound Input (IsoStream)", shape = "ellipse"]
    subunit_9 [label = "MSU Audio Input 1/2 (IsoStream)", shape = "ellipse"]
    subunit_10 [label = "MSU Audio Input 3/4 (IsoStream)", shape = "ellipse"]
    subunit_11 [label = "MSU Audio Input SPDIF (IsoStream)", shape = "ellipse"]
    subunit_12 [label = "MSU Midi Input (MIDI)", shape = "ellipse"]
    subunit_13 [label = "MSU Synch Input (Sync)", shape = "box"]
    }
    subgraph cluster_subunit_music_0_output {
      label = "output"
    subunit_14 [label = "MSU Compound Output (IsoStream)", shape = "ellipse"]
    subunit_15 [label = "MSU Audio Output 1/2 (IsoStream)", shape = "ellipse"]
    subunit_16 [label = "MSU Audio Output 3/4 (IsoStream)", shape = "ellipse"]
    subunit_17 [label = "MSU Audio Output 5/6 (IsoStream)", shape = "ellipse"]
    subunit_18 [label = "MSU Audio Output SPDIF (IsoStream)", shape = "ellipse"]
    subunit_19 [label = "MSU Midi Output (MIDI)", shape = "ellipse"]
    subunit_20 [label = "Internal Sync (Sync)", shape = "box"]
    }
  }
  subunit_14 -> unit_2 
  unit_0 -> subunit_8 
  subunit_20 -> subunit_13 [constraint=false]
}