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Wiki information Hampartsoum:
Hampartsoum Limondjian was an Armenian composer of Armenian church and classical music and musical theorist who developed the Hampartsoum notation system. The system was the main music notation for Armenian and Ottoman classical music until modern...
Hampartsum Boyajian, also known by his noms de guerre Murad and sometimes "Mets Murad", was an Armenians fedayi and a leading political activist of the Hnchak party.