!! operator to repeat each element of a list
x times. Beware of the confusion with it's little brother,
!. These two operators work hand in hand!
@swim def test_extend_repeat(p=0.5, i=0): D('pluck:19', legato=0.2, midinote='[60 62 63]!!3', i=i) #note the repetition of values within the list again(test_extend_repeat, p=0.125, i=i+1)