@libraz/libcantus - v1.1.0
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    Variable MARWA_MASKConst

    MARWA_MASK: number = ...

    Thaat Marwa of Hindustani classical music — S r G M' P D N: offsets {0,1,4,6,7,9,11}.

    The thaat carries the fifth; raga Marwa itself leaves it out, which is the kind of distinction a pitch-class mask cannot make.