 The instrumentalist himself cuts the bamboo to a suitable length and putting the bamboo to his lips in a playing position determines the distances of the flute stops by simply putting his fingers to the position marking the places where the two fingers nearest to a bamboo node come down.The distance between them becomes the standard length and on ascertaining the whole position the marked areas are burned with a hot iron nail.In the final stage, a separate mark is scratched carefully in alignment with the stop-hole near the upper rim, at a distance of one finger-width for a rectangular notch, gradually sloped as per thickness of the stem.