Crossover Spectrum is a pad pack series started by Dossar (myself) that specifically focuses on crossover patterns in certain BPM ranges. Listed below are some of the benefits I aimed to give with this series:

  1. Improve a player's ability to recognize many different crossover patterns.
  2. Improve a player's technique on crossovers, especially when there are longer streams of them.
  3. Play crossover charts that are C-MOD friendly. Using a C-MOD is encouraged in this pack series.
  4. Provide players more insight on how crossovers affect difficulty, especially with different types of them.
  5. Any other beneficial effect (new songs for the community, etc.)

Currently the series covers ranges 100-225 BPM in 16th notes. Part IV releases will be exclusive to tournaments for now. This series focuses on Singles only.

Pack Structure

Every Song in the pack series has three difficulties: Medium, Hard, and Challenge. Any other chart difficulties provided that aren't a part of those three are not part of the specfication. Some files might have an easy chart with arbitrary non-crossover stream, and there is a case of a song with a Beginner chart (CROSSOVER CHART from Part III).

If you've looked around the site already, you may have noticed that the packs have letters assigned to them. The I's represent the BPM range that the pack covers, and then any future expansion to that BPM range is covered by a letter different than I (starting at A).


Crossover Spectrum Part I A

  • debit13 made the fallback graphic for this pack.
  • TaroNuke submitted SPECIAL ABILITY.
  • Thomas Prag submitted Live Forever, Voyage 1969, and Here I Go Again. He also opened me up to some intricate lateral crossover patterning.

Crossover Spectrum Part II A

  • debit13 made the fallback graphic for this pack.
  • Sudzi781 submitted Bad Maniacs.
  • Thomas Prag submitted Blaze, Superluminal, and Ascension To Heaven.
  • Tyler submitted Horizon, Dawn of the Kore, Evaquated, and Dokudenpa.

Crossover Spectrum Part III A

  • debit13 made the fallback graphic for this pack.
  • hi19hi19 helped with syncing Scrap Syndrome.
  • Ben Speirs had an amazing topic in DDR + ITG players on his Crash Day file with 220 BPM crossovers which inspired BRUTE MAN to create the song CROSSOVER CHART as a tribute to this pack. BRUTE MAN is pleased to make his first appearance in rhythm games with the addition of his song to this pack series.

Contact Info

Video Channel

Videos for the pack series are uploaded to the YouTube channel. Keep a look out for videos that are linked in scores as well, since some players might upload videos to their own video channels.

Rhythm Game Sites

DossarLX ODI (FFR)

Dossar (AIJ)

Another method of contacting me is through PM on Flash Flash Revolution; I am a Game Manager on that site and visit daily. I also check the Aaron In Japan boards occasionally. I very rarely visit zenius-i-vanisher so I didn't put that link here.



Use the above email for file submissions to the pack series in addition to video submissions. By sending a video to be reviewed, you give permission for your video submission to be public on the Crossover Spectrum video channel.


Q: How do I add a score?

You need to contact me with the score details and I can put it on the site if it's valid.

Q: You realize nobody finds these files fun, right?

A few helpful nuggets of advice I can give about this pack series:

  1. Don't play this pack series anticipating high scores or you'll make yourself miserable.
  2. Don't be surprised if you have trouble with files in this pack that share similar difficulty ratings to other songs you do well on.
  3. Don't ignore the other difficulties if you don't like Challenge.
  4. Going to the above point, if all you're doing is playing the Challenge charts then you're acknowledging that you are willing to play the hardest difficulty with the hardest crossover patterns and most stream.

Q: Why do you use Beginner instead of Novice, and Challenge instead of Expert?

Expert is Heavy in DDR and is Challenge in ITG. I thought the ITG names for the other difficulties were more intuitive, although in the case of Beginner and Challenge I thought DDR's naming convention was more appropriate.

Q: What do you think about DDR charts?

Some of them are okay, although I always have to expect some sort of gimmick or weird doublestep whenever I play a file. In addition, any files that had crossovers were generally short-lived and I was interested in the idea of adapting a physical challenge with crossover streams. After being spoiled from this pack, I have to say that I dislike the majority of boss songs in DDR from how choppy they are. With Crossover Spectrum I know that everything works out because I've scrutinized these files heavily and wanted an alternative to gimmicky charts. Have you seen any of the Single DDR 19s? It looks like someone was trying to step crossovers but forgot which direction the player was turning, or just purposely put in doublesteps (or nonsensical spins) to make the file harder to score on. If the jump in the ending of Valkyrie Dimension Challenge was removed, it would've worked out as a lateral crossover.

Q: Will this pack series get doubles charts?

The focus is singles charts, so not from me.

Q: I'm interested in sending a chart. How do I submit a file?

A submission through e-mail is the preferred method.