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DJMax Technika Q Song Format

Original from: https://github.com/oliverchang/technika_q/blob/master/format.md

The track format has changed from that, this is the latest format

Header

  • 4 bytes unknown (always zeros?)
  • 4 bytes offset to song information

Song information (usually at the very end of the file)

  • 2 bytes number of sounds
  • 2 bytes number of tracks?
  • 2 bytes number of positions per measure?
  • 4 bytes initial BPM (float) (can be 0 if contains change bpm cmd)
  • 4 bytes end position
  • 4 bytes unknown (another float?) (Tag B)
  • 4 bytes end position
  • 4 bytes total command count?(can be 0) (not include start of track, but include change bpm )

Sounds Table

  • Starts at offset 8
  • An array of entries that are 0x43 bytes in size each:
    • 2 bytes index
    • 1 byte unknown
    • 0x40 bytes filename

Tracks

  • Track header:
    • 2 bytes of 0x0
    • 0x3B bytes of track name (The track name doesn't relate to it's function. Actually all the track name is empty string in the later patterns)

Follow by

  • An array of commands (0xD bytes each):
    • 4 bytes position
    • 1 byte command type
    • 8 bytes of params

Notes

  • The position refers to a position in the song
    • Its meaning is determined by the number of positions per measure (in song info)
    • Assumes 4/4 time signature?
  • There are usually 64 tracks
  • The playable tracks for 3 lines are (0 indexed in order of appearance in file):
    • 0: top line
    • 1: middle line
    • 2: bottom line

Command types

0: Start of a track

Params

  • 4 bytes note count shifted?
  • 4 bytes note count

1: Note

Params

  • 2 bytes Sound index in sounds table
  • 1 byte Volume
  • 1 byte Pan
  • 1 byte Attribute (Note type)
  • 1 byte? length (for long notes, unit is a single position)
  • 2 bytes unknown

Attributes

  • 0: normal note (drag note if length != 0x6)
  • A: repeat note
  • B: last repeat note
  • C: hold note
  • 5: chain note start (all notes in between have type 0)
  • 6: chain note end
  • 2: unknown
  • 100: VideoStart
  • 150: ?

2: Volume

Params

  • 1 bytes volume
  • 7 bytes unknown (It is ok to fill with 0)

3: BPM change

Params

  • 4 bytes float BPM
  • 4 bytes unknown

4: Unknown