1. chant (Q1553339) = verbal rhythmic speaking or singing (auctioneer chants, sports chants)
2. chant (Q23072435) = religious chanting genres. Might overlap with anthem (Q541947) / religious hymn (Q63203971) / Christian hymn (Q856713) / religious vocal music (Q64137792). Need more clarity in the descriptions and merge if needed
3. vocal music (Q685884)
4. singing (Q27939) - not type of music, but activity

subclasses of singing: https://w.wiki/3c2s
subclasses of chant (religous): https://w.wiki/3c2t
sublcasses of chant (verbal): https://w.wiki/3c2u
direct sublcasses of vocal music: https://w.wiki/3c2v