b1 >> pluck([0,2,5]+var([0,2]), dur=.25, oct=4).fadein()

b2 >> blip([0,2,0,5,2], dur=.25, oct=[6,7], amp=1).fadein()

b3 >> blip([0,2,0,5,2], dur=.5, oct=[3,4,8], amp=1.7, lpf=20000).fadein()


b1.eclipse()
b2.eclipse(4,12)
b3.eclipse(4,16,5)

b1.eclipse(smooth=.5)