dizi membrane change, how often?

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How often do you change your dizi's membrane, or after how much blowing time do you change it?

[YouLanFengChune]

a well picked membrane lasts up to 2 weeks if u play daily. The imporetant thing is NOT to have any moisture hit the surfave of the membrane, where its covering the hole.

its lasts longer that way.

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Thanks Are there any "symptoms" to look out for when the membrane needs changing? Like the sound getting a bit dull or something like that?

[YouLanFengChune]

Hi!

I did a brief survey of my students and friends.

Time to change? When all the lines have dissapear, when the di mo has turned moist, or even when u just feel that the sound gets dull.

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Ahh.. I change the dimo pretty soon when it has gotten moist, which happens sometimes since I have to play in a pretty cold room (winter time..) in order not to disturb others, I can feel the sound go dull pretty quickly when the membrane is wet.

the lines have disapear, hmm.. I usually loosen the membrane slightly.. sometimes works to prolong its life..
Thanks!