Simple Python 3 script to sum a list of durations. Data from https://soundcloud.com/wmstrecs/sets/n-o-i-s-e.

durations.txt

4:24
1:58
4:47
3:44
3:55
1:53
6:49
4:04
12:01
3:24
5:10
4:03
16:55
7:38
3:37
18:44

sum_durations.py

from datetime import timedelta
from functools import reduce
from operator import add


def parse_duration(duration_string):
    sections = map(int, duration_string.split(':'))
    return timedelta(minutes=next(sections), seconds=next(sections))

with open("durations.txt") as f:
    duration_strings = f.readlines()
    print(reduce(add, map(parse_duration, duration_strings)))