@ -55,7 +55,7 @@ def at(t):
ret = 0
for j in range(max(i - 32, 0), i):
m = music[j]
if m[1] > t:
if m[1] > t and m[2] > 0:
ret += m[4] * m[5](freq(m[2], m[3]), t - m[0])
return int(2**28 * ret)