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The evolution of the system halted after the penetration of Western music into Russia, called "Latin singing" by the Orthodox Church, the term was considered derogatory, since it referred to "incorrect Latin faith".
Currently hooks are used only by the [[Old Believers]]. Different denominations of Old Believers use different types of hook system. In the 19th century, some Old Believers
([[Edinoverie|Edinovertsy]]}, for example) have tried to move to the modern neume form of notation that tries to capture exact relations between pitches; currently they use a standard linear notation.