Audiio Vario on Prime MarkII

SoftRF on Prime MkII drives a piezo speaker by GPIO14 pin to act as a audio vario. SoftRF drives GPIO13 pin for notification on other models than Prime MkII. The patch in github.com/CazYokoyama/SoftRF... makes audio vario sound in addition to notification. You hear what sound you have when 1-17 knots of vertical speed. The black round shape device is a piezo speaker. It will be replaced by the smaller one and will be inside of housing. I am glad if you tell me whether the sound is acceptable.