The Extended 669 format, is a format that made improvements on the former 669 Format; mainly adding new effects and support for 44kHZ samples instead of the limitation of 22kHZ in the vanilla 669 Format; it consist of sampled tracked music up to 8 channels first implemented in 1994 by Jason Nunn on his Unis 669 tracker.
This extended version of the 669 format may have the next header on its first 2 bytes on the module: JN
Restrictions on submitting a Extended 669 module
The max size of each sample/instrument must not surpass 1 MByte.
They file must be 128 patterns long at most, with a maximum of 64 rows each one.
The samples must not exceed 44 kHZ.
Effects used for the Extended 669 format
Axx - Portamento up.
Bxx - Portamento down.
Cxx - Port to note.
Dxx - Frequency adjust.
Exx - Frequency vibrato.
Note: if you set any of those effects with a value of 00, all the effects in that row may be cancelled and the notes that comes next may be played normally
Fxx - Set tempo.
F0x - Super Fast Tempo.
Gnx - Balance fine slide.
0 - Balance fine slide Left.
1 - Balance fine slide Right.
Hxx - Slot Retrig.
Tools and Trackers used for the Extended 669 format