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The venu is discussed as an important musical instrument in the Natya Shastra , the classic Hindu text on music and performance arts.  The ancient Sanskrit texts of India describe other side blown flutes such as the murali and vamsika , but sometimes these terms are used interchangeably. A venu has six holes, is about the thickness of a thumb, and twelve fingers long. A longer murali has four holes and two hands longs. The vamsika has eight holes, between twelve and seventeen fingers long. 
A phonetically similar same for the same instrument, in early medieval texts, is the Sanskrit word vamsi which is derived from root vamsa (Sanskrit: वंश  ) meaning bamboo.  A flute player in these medieval texts is called vamsika . 
Welcome to indianflutemusic.com, your gateway to the classical music of northern India. My name is Kerry Kriger. In 1996 I began my quest to learn bamboo flute. I studied for ten years with Pandit Vijay Raghav Rao, one of India's greatest flute masters. In this website I pass the music on to you. Whether you are visiting this website to listen or to learn, enjoy! -- Kerry Kriger, Ph.D.