These intonations are in use since ancient time and Mahamuni Patanjali has included the main rules of this in his Mahabhasya.
य सवर बहत परचन समय स परचलत ह और महमन पतजल न अपन महभषय म इनक मखय मखय नयम क समवश कय ह 
<bos><start_of_turn>user
These intonations are in use since ancient time and Mahamuni Patanjali has included the main rules of this in his Mahabhasya.<end_of_turn>
<start_of_turn>model
य सवर बहत परचन समय स परचलत ह और महमन पतजल न अपन महभषय म इनक मखय मखय नयम क समवश कय ह<end_of_turn>
