How many keys can one cucurbit flute play?

Because the traditional cucurbit flute has seven pronunciation holes (heads) in production, one pronunciation hole has one sound (cannot blow an octave on a sound hole through the change of breath like a bamboo flute), plus a tube tone can make a total of Blow out eight notes. Therefore, in general, the traditional cucurbit flute can change the original fingering by moving the position of the palace sound. In theory, it should be able to blow out five to six tones. However, due to the limitation of the range and scale arrangement, the traditional cucurbit flute can only change to four tones at present. And there are only two commonly used tunes, that is, the bass tone is "5" and the bass tone is "1". Taking Hulusi in the key of C as an example, in addition to this key (the third hole is 1), it can also be played in the key of G (the drum tone is “1”). It is a six-tone mode based on the national pentatonic scale. There are certain limitations, not all songs can be played, it should be selected according to the range of the music, the best tuning is to use the third hole as "1" to play, if the music needs to be transferred, it can be solved by replacing the cucurbit , the commonly used cucurbit silk has B, C, D, F and so on.