DanceDanceRevolution (AC) (Japan)

With these gimmicks, it might still take a while.



EDIT: From the score, we can conclude that has 272 steps/freezes total, at least 4 of which are freezes.

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I'm wondering if this says anything more on the case of the the conditions of getting orbs because it mention something about NITRO advent.

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translates to: "Official announcement of songs obtained by collecting NITRO!"

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ahahaha there's a stop before it goes quick. That's deliciously rude.

Also, anyone else notice the arrow receptors on the top are flashing on what should effectively be an 8th note?

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So...Who wants to make bets on when the song will be passed?

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What if the song's not possible to PFC? So far, we are in 20 seconds of the song so far, the stops in it and a sudden speedup after it, what else should we expecting after that?

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I actually did notice that, but I wasn't sure if it was like that for all songs...I couldn't remember.
Hope we get more video footage soon...

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That flashing explosion comes from 5th mix when you reach 50 combo (if I remember correctly), and 100 combo since DDR Max. In DDR Extreme, the arrow receptors flashes in yellow if you get a perfect, and flashes in white/silver if you get a Marvelous (even in normal play, where the game only shows the Perfect and Marvelous isn't shown). Since DDR X the flashing explosion comes only if you get a marvelous, if you get a Perfect or a great, it just shows the normal arrows reception.

I don't think you understood what we meant by that. Don't the receptors on the top flash every quarter note as a sort of visual metronome? It seems off by an 8th on Over The "Period"

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You're right, I noticed that also. It's definitely not like that for other songs; I checked Egoism 440 and Max.(period) as well as a couple others. What makes this stranger is that it's not like it's flashing twice per beat "because the BPM is slow" or something; it's specifically only flashing on the 8th note offbeats. Strange, but read on.

Did the usual frame breakdown of the video, and it turns out that the 8th note flashes become critical to analyze the new parts of the song we've just seen. I don't know why they're there, but I'm glad they are.

The cabinet lights are unfortunately largely not visible in the video, so I went by steps instead. Since they're all Marvelouses or Perfects anyway this should still be reasonably accurate.

As usual, the first six beats take 332 frames to scroll by (~32.5 BPM) and themselves don't vary much, suggesting no slowdowns. The seventh, eighth, and ninth beats take 59, 66, and 72 frames, which is within the margin of error from the previous video where they took 60, 65, and 72 frames.

The tenth beat (the fourth and last freeze) can't be measured directly because of the stop before it ends, but here's where the 8th note flashes come in. You can clearly see the flash in the middle of the tenth beat, and it takes 40 frames from the beat's beginning. This means it takes between 39.5 and 40.5 real-time increments of 1/30 sec for half a beat to pass, which bounds the BPM of the last freeze between about 22.2 and 22.8. Since the third freeze was ~25 BPM, this means that all four freezes slow down the BPM.

For simfile makers out there, it takes 29 frames from the flash (beat 9.5) before the freeze ends. This suggests that the end of the freeze is on beat 9.875 or one 32nd note's position before the next step. The stop itself arrives 6 frames later, suggesting beat 9.9375 or a 64th note before. The stop lasts 38 frames or ~1.267 sec.

Without the cabinet lights it's very hard to gain much of what the speedup is like. After it begins, the arrows are only visible for 1 frame before they halt and the FAILED screen comes up. I suppose it would be possible to count how many pixels the arrow at the bottom of the screen moves per frame and compare it to how fast the arrows move at the beginning of the song, but that's an exercise in tedium I'd rather not get involved in. What we do have is, again, that lovely 8th note flash marking the middle of the eleventh beat. It's briefly visible right between the "I" and "L" of "FAILED" during the shutter-closing animation. This comes 7 frames after the player hits the Great. However, from the video and the movement of the note at the bottom of the screen, we can safely assume that the player hit the Great either 1 or 2 frames early, which means that it takes between 5 and 6 frames for half a beat to pass during the speedup. Rounding both ways, we can bound half a beat between 4.5 and 6.5 frames, which yield BPMs of between ~138 and 200. A rather wide range, but the best we can do given what we have, and enough to know that playing above 4x speed might be risky.

So much math Where did you guys learn how to calculate all of this?

I think it should be a way to confuse the player ... just saying

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He ripped the video and analysed it frame by frame. By doing that, you can work out the exact frame arrows are hit on, and given that it's running at 30fps (it is, right? I don't know anymore), it's a case of dividing by 30 to get the time in seconds, then dividing again by 60 to get the BPM.

It's a better way than my 'rip the mp3, open it in FL Studio, pray to your chosen god and hope for the best' method.

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More side notes (hopefully anyone who accesses this song reads this):
- The 8th note flashes can really help to time the first three slowdowns, as the BPM doesn't seem to change within the middle of a beat.
- If you're recording, make sure to zoom out enough so the cabinet lights are visible. They'll provide important cues, especially if there happens to be a BPM change after the fail point.

"Over the Period" sounds like Similar to Beginnig Part of "Pluto" or

And Egoism ending sounds like fascination max.

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OT"P"'s beginning is also similar Shiny World's.

Anyway, here's another video of an attempt so this post won't be completely pointless.

Props to the player on the right picking 0.25x; we get to see six seven more steps into the chart! But we still don't have any new information on how fast the speedup is...

(For the record, since any more frame data can be useful: the first six beats took 332 frames to scroll by. The seventh beat took 60 frames, and the eighth took 66 frames.)

Update:

So I straightened this screencap from the video into a rectangle and added guide lines to help read the 0.25x. The center of each on-the-beat arrow should be on top of a guideline, and each arrow should fit within exactly four guideline spaces.

This shows the rhythm of the part after the speedup (and also reveals that the up arrow blocked by the score counter is in fact two overlapping arrows a beat apart!). Assuming a 4/4 time signature and using one non-whitespace character per beat:

RR-- DD-- RR-- UU-- D

From a direct line-in video in nicovideo... this is the best quality (so-far) of the banner available at the moment...

http://www.nicozon.net/watch/sm25992000

Over the "Period" forces off Boost.

Video of chart on 0.75x. Fails on first step but the first eight beats of the chart are visible. Chart is identical to but with left and right switched.