A quandry for you math heads?

[FunkyMonkee]

I'm big into Tangerine Dream and have hundreds of hours of their music but, I'm still missing some.
Last night, I found one of their concerts posted on YT. It runs just over 2 hours and 2 minutes long. There's at least one web site that's all about TD and lists just about everything they ever did. According to this site, this particular concert has 25 songs in it and it gives the titles and timings of each song. Totaled up (even though, for some strange reason, they're rounded up to the nearest 15 second mark), they come out to just about 2 hours and 2 minutes, just like the YT video but, the video is missing 7 songs!! How is this possible?
Here's the song list with timings.
Trauma (9:15)
Serpent Magique (8:00)
No Man's Land (4:15)
Sally's Garden (5:15)
Hyperborea (4:15)
Sphinx Lightning (8:00)
Carmel Calif (8:30)
Leviathan (6:45)
Wisdom And Tragedy (7:00)
The Blue Bridge (4:15)
Fire On The Mountain (7:15)
Leaving The Masters For Good (2:00)
Cinnamon Road (4:45)
Hunter Shot By A Yellow Rabbit (10:45)
Scrap Yard (4:15)
The Dream Is Always The Same (4:15)
Betrayal (Sorcerer Theme) (4:00)
La Libération (5:15)
Going West (4:30)
Loved By The Sun (5:30)
Love On A Real Train (Risky Business) (6:15)
Le Parc (L. A. - Streethawk) (3:00)
One Night In Space (8:00)
Beach Theme (4:00)
Cloudburst Flight (8:30)

And, here's the video.

[WindAtMyBack]

How did you add up the seconds? Did you convert to decimal?

9:15 = 9.25 minutes
8:30 = 8.5 minutes
4:45 = 4.75 minutes
etc

I must have been making mistakes because I added the numbers 3 times and got three different totals. But they were all much longer than 2 hours and 2 minutes.

[FunkyMonkee]

Same way I've been doing it for the past 40-some years. Add up the seconds, divide by 60, add the amount of 60's to the minutes.
120 seconds = 2:00, 180 seconds = 3:00, 240 seconds = 4:00, 300 seconds = 5:00, 900 seconds = 15:00. If you've got 148 seconds that's 2:28.
Suffice to say, I know what I'm doing when I'm adding timings! I've been doing TONS of it for decades!! I just did a few hours worth before responding to this on my Mike Oldfield list. I even had to teach my guitarist how to do it on our first album back in `86 because he was adding seconds as if 100 seconds equals 1 minute!
Yeah, I keep getting different totals, too, for some reason. I'll have the grand total at the bottom of the list of records and then I go through the list to add up things in that specific order they're in to see what size tapes or CD's would work best to record them on. So, when I'm done with that, every one of those sets SHOULD grand total out to the same grand total at the bottom of the song list but, it rarely ever does!! Nor do any two sets (like, if I do one set for open reel tapes and another for CD's) equal the same amount! But, for the most part, I don't worry about that so much. It's GONNA happen no matter what I do so, screw it! And I usually use a calculator so, HOW can I get different numbers if I'm adding the same info?

[WindAtMyBack]

Normally your way is the only way to do it. But in this case, when it's rounded to 15 seconds, I thought it was easier to just convert to decimal first.

I'm coming up with 147.75 = 147:45

[FunkyMonkee]

2:27:45?
I just added it again and got 2:28:15. With that, I THINK what happened was that I HAD the total time of the video but wanted the timings for each song so, I found those on the web site (voices in the net) and just pasted what they had into my list, never actually adding them up to see what's there.
What I DON'T understand is WHY they would go to the trouble to round up everything to 15's instead of just posting the correct timings! It'd take MUCH less time! Unless they let some computer gear do it for them.
Here's how I add time on a calculator.
Let's say I've got the timings, 23:45, 16:12, 8:32, 15 and 1:36:11. Any place the colon goes, put a 0 in those spots when entering the numbers so, instead of the numbers here, you'd punch in;
23045
16012
8032
15 (You don't need an 0 for this one)
1036011
Add those up and you get: 1083115. At this point, you remove 60 from the 115 and add 1 to the 083 making it 084 and you now have 55 seconds left. Next, you take 60 out of 84 and add 1 to the 1 making that a 2 and the remaining minutes are 24. So, you've got a total of 2:24:55.
My calculator only goes up to 8 digits so, if the hours section goes beyond 99, I'll get an error message. Before it gets that far, I'd have to divide the hours by 24. If it IS 99 hours, that'd give me 4 days and 3 hours.
I came up with this at least back in the mid `70's.

[WindAtMyBack]

I used to do a lot of that back in the 70s. Only I was recording cassettes to listen to in the car. I'd try to save money by squeezing as much as possible on a tape.

I have no idea what happened to all those tapes. I don't know what happened to the albums I recorded from either.

For some reason the only one I clearly remember recording was Captain Lockheed and the Starfighters.

[FunkyMonkee]

Same here. I did it for cassettes, then open reel tapes, then CD's, then SD cards and then MP3 CD's and DVD's.
I still have nearly all of my records. Over 62,000. Sadly, thanks to my evil, greedy ex-sisters, I lost at least 2000 78's 4 years ago!!
I have tons of collections I try to put together, Laurie Anderson, King Crimson, The Beatles, Capt. Beefheart, Tangerine dream, Mike Oldfield, XTC, Pink Floyd, 1910 Fruitgum Co., Ohio Express, The Lemon Pipers, Kissing The Pink,. Fishbone, Yes, Prince, Spike Jones, Glenn Miller, Oingo Boingo, Rupert Hine, The Fixx, Art Of Noise, Frankie Goes To Hollywood, 10 c. c., Kraftwerk, Big Country, Genesis, and a few others, and I am trying to find MP3's of most of the 78's I lost, as well as compiling a massive collection of psych (the kind that makes you see things BEFORE you take the drugs!) the British Invasion, break-in records (Dickie Goodman, etc.), music from the 1965 era (late `64 to early `66), the early `80's new wave era and huge archiving jobs of my 78's and 45's.