=============================
Unofficial .1 Format Document

Created 2007.04.03
Updated 2007.04.06
-----------------------------


 A .1 file immediately begins with the note-chart offset
 header. This header contains 12 entries, 6 1-player charts,
 followed by 6 2-player charts.

 Even if a song doesn't have 12 charts, the .1 header must
 contain 2 sets of 6 entries (Unused entries are zero'ed out).


 The typical entry order:

 -Hyper    (1P 7K)
 -Normal   (1P 7K)
 -Another  (1P 7K)
 -Beginner (1P 7K)
 -(unused)
 -(unused)
 -Hyper    (2P 14K)
 -Normal   (2P 14K)
 -Another  (2P 14K)
 -(unused)
 -(unused)
 -(unused)


 Each note-chart entry is 8 bytes in size.
 ===================================================================
 0: 4-byte DWord - Offset to beginning of note-chart data (in bytes)
 4: 4-byte DWord - Size of note-chart data (in bytes)
 -------------------------------------------------------------------



 After obtaining the Offset and Size values, we can then access
 the note chart data!

 The data consists of 8-byte entries for each event (note, tempo change,
 etc.).
 ================================================
 0: 4-byte DWord - Event time (in seconds/59.941)
 4: 1-byte       - Event type
 5: 1-byte       - Data1       (explained below)
 6: 2-byte Word  - Data2       (explained below)
 ------------------------------------------------

 Event time is the time an event is played.

 An event time value of 2130706432 (byte values 0,0,0,127)
 marks the end of the note chart sequence.
 

 Event types:                 Column numbers:
 =========================    ====================
 0  - Player 1 Note                         1 3 5
 1  - Player 2 Note           (Scratch) 7  0 2 4 6
 2  - Player 1 Set Sound #    --------------------
 3  - Player 2 Set Sound #
 4  - Tempo change
 5  - (Unknown, Default Measure Size?)
 6  - "Song Stop" event
 7  - Autoplay BG sound
 8  - (Unknown, maybe timing set?)
 12 - Measure divider line
 16 - (Depends on Data1)
 -------------------------


 Player Note (Events 0,1) - Places a note in the column indicated by
                            Data1.

 Set Sound # (Events 2,3) - Tells what sound the following notes in the
                            specified column should play. Data1 indicates
                            the column number, Data 2 the sound number.

 Tempo Change (Event 4) - Divide Data2 by Data1 to obtain the new tempo.
                          That procedure allows for floating-point numbers
                          to be stored in only 3 bytes (Floating-point
                          numbers are 4-bytes in length)

 Default Measure Size (Event 5) - I don't know what this does, or if it's
                                  even used.

 Song Stop (Event 6) - Does what it says. When this event is triggered, the
                       screen will fade out and go to the results.

 Autoplay BG sound (Event 7) - Simple. Play the sound referenced by Data2.

 Measure Divider Line (Event 12) - Places a measure line in the note
                                   structure depending on Data 1 (If Data1
                                   is 0, place in Pl.1. If 1, place in Pl.2)

 Total Notes (Event 16, Data1 0) - The number of playable notes in the song
                                   are held in Data2.
 
 Unknown (Event 16, Data1 1) - "Bad" judgement setting? I don't know.