lss = 
  labeledSignalSet with properties:

             Source: {2x1 cell}
         NumMembers: 2
    TimeInformation: "sampleRate"
         SampleRate: 4000
             Labels: [2x3 table]
        Description: "Characterize wave song regions"

 Use labelDefinitionsHierarchy to see a list of labels and sublabels.
 Use setLabelValue to add data to the set.

ans=2×3 table
                 WhaleType    MoanRegions    TrillRegions
                 _________    ___________    ____________

    Member{1}      blue       {3x2 table}    {1x3 table} 
    Member{2}      blue       {3x2 table}    {1x3 table}