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Persune edited this page Jul 9, 2025 · 18 revisions

Dn-FamiTracker module file (.dnm) format

  • Not yet complete!
  • Last updated 2025-07-09
  • version 4.50

About

  • This text aims to document the binary module file format as of Dn-FamiTracker v0.5.1.1.
  • Each section is declared sequentially as it appears in the file.
  • Unless specified otherwise, all data is stored in little-endian format.
  • Strings are stored in ASCII encoding unless specified otherwise.
  • The term "Song" and "Track" may be used interchangeably due to them being switched around in the source and in earlier documentation.

Version Chart

FamiTracker

Version Module Version PARAMS INFO TUNING HEADER INSTRUMENTS SEQUENCES FRAMES PATTERNS TRACK DPCM SAMPLES SEQUENCES_VRC6 SEQUENCES_N163 COMMENTS SEQUENCES_S5B
0.2.2 stable 2.00 (0x0200) 1 1 - - 1 1 1 1 - 1 - - - -
0.2.4 stable 2.01 (0x0201) 1 1 - 1 1 1 1 1 - 1 - - - -
0.2.5 stable 2.03 (0x0203) 1 1 - 1 1 2 1 1 - 1 - - - -
0.2.6 stable 2.03 (0x0203) 2 1 - 2 2 2 2 2 - 1 - - - -
0.2.7 stable 3.00 (0x0300) 2 1 - 2 2 3 3 3 - 1 - - - -
0.2.8 beta 5 3.00 (0x0300) 2 1 - 3 2 3 3 3 - 1 1 - - -
0.2.9 stable 3.00 (0x0300) 2 1 - 3 2 3 3 3 - 1 1 - - -
0.3.0 stable 3.00 (0x0300) 2 1 - 3 2 3 3 3 - 1 1 - - -
0.3.0 re-release 4.10 (0x0410) 2 1 - 3 2 4 3 3 - 1 1 - - -
0.3.5 beta 0 4.20 (0x0420) 3 1 - 3 2 4 3 3 - 1 1 - - -
0.3.5 stable 4.20 (0x0420) 3 1 - 3 2 5 3 3 - 1 5 - - -
0.3.6 beta 1 4.20 (0x0420) 3 1 - 3 2 6 3 4 - 1 6 - - -
0.3.6 beta 2 4.20 (0x0420) 3 1 - 3 2 6 3 4 - 1 6 - - -
0.3.6 beta 3 4.20 (0x0420) 3 1 - 3 2 6 3 4 - 1 6 - - -
0.3.6 beta 4 4.20 (0x0420) 4 1 - 3 2 6 3 4 - 1 6 - - -
0.3.6 stable 4.20 (0x0420) 4 1 - 3 2 6 3 4 - 1 6 - - -
0.3.7 beta 0 4.20 (0x0420) 4 1 - 3 2 6 3 4 - 1 6 - - -
0.3.7 stable 4.20 (0x0420) 4 1 - 3 2 6 3 4 - 1 6 - - -
0.3.8 beta 0 4.20 (0x0420) 4 1 - 3 2 6 3 4 - 1 6 - - -
0.3.8 beta 1 4.20 (0x0420) 5 1 - 3 2 6 3 4 - 1 6 1 - -
0.3.8 beta 2 4.20 (0x0420) 5 1 - 3 2 6 3 4 - 1 6 1 - -
0.3.8 beta 3 4.20 (0x0420) 5 1 - 3 2 6 3 4 - 1 6 1 - -
0.3.8 beta 4 4.20 (0x0420) 5 1 - 3 2 6 3 4 - 1 6 1 - -
0.3.8 beta 5 4.20 (0x0420) 5 1 - 3 2 6 3 4 - 1 6 1 - -
0.4.0 stable 4.30 (0x0430) 6 1 - 3 5 6 3 5 - 1 6 1 - -
0.4.1 stable 4.30 (0x0430) 6 1 - 3 5 6 3 5 - 1 6 1 - -
0.4.2 beta 1 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.2 stable 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.3 beta 1 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.3 beta 2 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.3 stable 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.4 beta 1 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.4 stable 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.5 beta 1 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.5 stable 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.4.6 stable 4.40 (0x0440) 6 1 - 3 6 6 3 5 - 1 6 1 1 -
0.5.0 beta 1 4.50 (0x0450) 9 1 - 4 8 6 3 6 - 1 6 1 1 1
0.5.0 beta 2 4.50 (0x0450) 9 1 - 4 8 6 3 6 - 1 6 1 1 1
0.5.0 beta 3 4.50 (0x0450) 9 1 - 4 8 6 3 6 - 1 6 1 1 1
0.5.0 beta 4 4.50 (0x0450) 9 1 - 4 8 6 3 6 - 1 6 1 1 1
0.5.0 beta 5 4.50 (0x0450) 9 1 - 4 8 6 3 6 - 1 6 1 1 1
0.5.0 beta 10 5.00 (0x0500) 10 2 1 - 9 7 - - 1 1 7 1 1 1

Notes

Format overview

Parameters

  • m_iExpansionChip
  • m_iChannelsAvailable
  • m_iMachine
  • m_iEngineSpeed
  • m_iVibratoStyle
  • m_vHighlight
  • m_iNamcoChannels
  • m_iSpeedSplitPoint
  • m_iDetuneSemitone
  • m_iDetuneCent

Song Info

  • m_strName
  • m_strArtist
  • m_strCopyright

Tuning

  • m_iDetuneSemitone
  • m_iDetuneCent

Instruments

  • Instrument index
  • Instrument count
  • pInstrument
    • Type
    • CInstrumentManager
    • Instrument name length
    • Name

Sequences

  • 2A03 sequence count
    • Sequence index
    • Sequence type
    • Sequence item count
    • Sequence loop point
    • Sequence release point
    • Settings
    • for each Sequence item count:
      • Value

Frames

  • for each m_iTrackCount:
    • Track frame count
      • m_iChannelsAvailable
        • Pattern index
    • Track default speed
    • Track default tempo
    • Track default row count (PatternLength)

Patterns

  • Pattern track index
  • Pattern channel index
  • Pattern index
  • Pattern data count
    • Row index
      • stChanNote Note
        • Note value
        • Octave value
        • Instrument index
        • Channel volume
      • effect columns
        • Effect index
        • Effect Param

DSamples

  • DPCM sample count
    • DPCM sample index
    • DPCM sample name length
    • DPCM sample name
    • DPCM sample size
    • DPCM sample bytes

Header

  • m_iTrackCount
    • m_pTracks[i]
  • for each m_iChannelsAvailable:
    • Channel type index (unused)
    • for each m_iTrackCount:
      • Effect column count
  • for each m_iTrackCount:
    • m_vHighlight.First
    • m_vHighlight.Second

Comments

  • m_bDisplayComment
  • m_strComment

Sequences VRC6

  • VRC6 sequence count
    • Sequence index
    • Sequence type
    • Sequence item count
    • Sequence loop point
    • Sequence release point
    • Settings
    • for each Sequence item count:
      • Value

Sequences N163

  • N163 sequence count
    • Sequence index
    • Sequence type
    • Sequence item count
    • Sequence loop point
    • Sequence release point
    • Settings
    • for each Sequence item count:
      • Value

Sequences S5B

  • 5B sequence count
    • Sequence index
    • Sequence type
    • Sequence item count
    • Sequence loop point
    • Sequence release point
    • Settings
    • for each Sequence item count:
      • Value

Detune Tables

  • Detune table count
    • Detune table index
      • Detune table note count
        • Detune table note index

Grooves

  • Groove count
    • Groove index
    • Groove size
      • Groove item
  • Use-groove flag count
    • Use-groove flag

Bookmarks

  • Bookmark Count
    • CBookmark, which includes
      • Bookmark track index
      • Bookmark frame index
      • Bookmark row index
      • m_vHighlight.First
      • m_vHighlight.Second
      • m_bPersist
      • m_sName

Params Extra

  • m_bLinearPitch
  • Global semitone tuning
  • Global cent tuning

JSON

  • (optional JSON data)
    • APU1_OFFSET
    • APU2_OFFSET
    • VRC6_OFFSET
    • VRC7_OFFSET
    • FDS_OFFSET
    • MMC5_OFFSET
    • N163_OFFSET
    • S5B_OFFSET
    • USE_SURVEY_MIX

ParamsEmu

  • m_bUseExternalOPLLChips
  • for each patches:
    • m_iOPLLPatchBytes[8]
    • m_strOPLLPatchNames

Datatypes and constants

File Header

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid values Notes
char[256] 256 FILE_HEADER_ID, FILE_HEADER_ID_DN Identifier string FamiTracker Module, Dn-FamiTracker Module In Dn-FT v0.5.0.0, this was changed to Dn-FamiTracker Module to avoid collision with FT 0.5.0b modules.
unsigned int 4 m_iFileVersion Module version Version number is formatted as BCD (ex. 4.50)

Notes

  • Information is based on DocumentFile.cpp CDocumentFile::BeginDocument() and FamiTrackerDoc.cpp CFamiTrackerDoc::SaveDocument()
  • Modules saved in Dn-FamiTracker v0.5.0.0 and later may save modules with FILE_HEADER_ID_DN identifiers, to prevent older FamiTracker versions from reading incompatible data such as FILE_BLOCK_JSON and FILE_BLOCK_PARAMS_EMU.

Block header

Each block has a 24-byte header consisting of a block ID, block version, and block size.

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes
char[16] 16 m_cBlockID Identifier string char data Length is zero-padded to 16 bytes
unsigned int 4 m_iBlockVersion Block version 0x0000 to 0xFFFF Block version number is ANDed with 0xFFFF, but is still written as 32-bit signed integer
unsigned int 4 m_iBlockPointer Block size, not counting the block header

Internal blocks

Parameters block

Block ID: PARAMS

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
unsigned int 4 m_iSongSpeed Song speed of track 0 Moved to FRAMES block. Off-by-one in module version 2.00 when less than speed-split point (20) 1
char 1 m_iExpansionChip Expansion audio bitmask Same format as expansion audio bitmask found in the NSF format 2+
unsigned int 4 m_iChannelsAvailable Number of channels added 1 to MAX_CHANNELS Includes the 5 channels from 2A03. 1+
unsigned int 4 m_iMachine NTSC or PAL machine_t::NTSC, machine_t::PAL 1+
unsigned int 4 m_iPlaybackRateType Playback rate type, 0 = default, 1 = custom, 2 = video 0 to 2 7+
unsigned int 4 m_iPlaybackRate NSF playback rate, in microseconds 0x0000 to 0xFFFF 7+
unsigned int 4 m_iEngineSpeed Engine refresh rate, in Hz 1-6
unsigned int 4 m_iVibratoStyle 0 = old style, 1 = new style vibrato_t::VIBRATO_OLD, vibrato_t::VIBRATO_NEW Stored as vibrato_t in the tracker. 3+
unsigned int 4 SweepReset Hardware sweep pitch reset Not implemented? Vanilla 0.5b stuff. Probably boolean type. 7+
int 4 m_vHighlight.First 1st row highlight 3-6
int 4 m_vHighlight.Second 2nd row highlight 3-6
unsigned int 4 m_iNamcoChannels Number of N163 channels used 1 to 8 Only accessed when N163 is enabled. Initialized to 4 when unused in version 10? 5+
unsigned int 4 m_iSpeedSplitPoint Fxx speed/tempo split-point Default is 0x20. Set to 0x15 in versions 5 and lower. 6+
char 1 m_iDetuneSemitone Semitone detuning, range from -12 to 12 0 Moved to Tuning block in FT 050B10. 8-9
char 1 m_iDetuneCent Cent detuning, range from -100 to 100 0 Moved to Tuning block in FT 050B10. 8-9

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Parameters()
  • Global semitone and cent detuning equivalent in Extra Parameters block.

Song Info block

Block ID: INFO

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char[32] 32 m_strName Module name Length is zero-padded to 32 bytes 1
char[32] 32 m_strArtist Module artist Length is zero-padded to 32 bytes 1
char[32] 32 m_strCopyright Module copyright Length is zero-padded to 32 bytes 1
char[] Length of zero-terminated char[] string m_strName Module name Length of string must not exceed 32 characters 2
char[] Length of zero-terminated char[] string m_strArtist Module artist Length of string must not exceed 32 characters 2
char[] Length of zero-terminated char[] string m_strCopyright Module copyright Length of string must not exceed 32 characters 2

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_SongInfo() and module binary analysis
  • in FamiTracker 0.5.0 beta 10, this was changed to be zero-terminated strings.

Tuning block

Block ID: TUNING

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char 1 m_iDetuneSemitone Global semitone tuning -12 to 12 1
char 1 m_iDetuneCent Global cent tuning -100 to 100 1

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Tuning() and module binary analysis
  • Added in FamiTracker 0.5.0 beta 10
  • Global semitone and cent detuning equivalent in Extra Parameters block.

Header block

Block ID: HEADER

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char 1 (unused) Channel type index 0 to chan_id_t::CHANNELS - 1 Unused. Version 1 only has one track, so it initializes m_iTrackCount = 1 1
char 1 m_iTrackCount Number of tracks added. 0 to MAX_TRACKS - 1 Stored as m_iTrackCount - 1 2-4
char[] Length of zero-terminated char[] string m_iTrackCount m_pTracks[]->m_sTrackName Names of each track Each track name is zero terminated, and therefore delineated by a byte of 0. 3-4
char 1 m_iChannelsAvailable m_iChannelTypes[] Channel type index 0 to chan_id_t::CHANNELS - 1 See Channel ID table. 1-4
char[] m_iTrackCount ^ m_pTracks[]->m_iEffectColumns[] Number of additional effect columns on a given channel, per track 0 to MAX_EFFECT_COLUMNS - 1 On version 1, this was restricted to the first track. 1-4
int 4 m_iTrackCount m_vHighlight.First 1st row highlight 0 to 255 (cast to unsigned char) FT 050b1. Stores per-track row highlights. 4
int 4 ^ m_vHighlight.Second 2nd row highlight 0 to 255 (cast to unsigned char) FT 050B1. Stores per-track row highlights. 4

Channel ID

Chip Identifiers
2A03 00, 01, 02, 03, 04
VRC6 05, 06, 07
MMC5 08, 09, 0A
N163 0B, 0C, 0D, 0E, 0F, 10, 11, 12
FDS 13
VRC7 14, 15, 16, 17, 18, 19
S5B 1A, 1B, 1C

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Header()
  • Replaced by TRACK block in FamiTracker 0.5.0 beta 10

Track block

Block ID: TRACK

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char 1 data: track name 0x00 Track name data indicator 1
char[] Length of zero-terminated char[] string m_pTracks[]->m_sTrackName Track name Track name is zero terminated. 1
char 1 data: track settings 0x01 Track setting data indicator 1
unsigned int 4 Track default row count 1 to MAX_PATTERN_LENGTH 1
unsigned int 4 Track default speed 0 to MAX_TEMPO 1
unsigned int 4 Track default tempo 0 to MAX_TEMPO 1
char 1 data: track row highlight 0x02 Row highlight data indicator 1
char 1 m_vHighlight.First 1st row highlight Stores track row highlights. 1
char 1 m_vHighlight.Second 2nd row highlight Stores track row highlights. 1
char 1 data: track effect columns 0x03 Effect column data indicator 1
char[] m_iTrackCount m_pTracks[]->m_iEffectColumns[] Number of additional effect columns on a channel, per channel 0 to MAX_EFFECT_COLUMNS - 1 1
char 1 data: track frame data 0x04 Denotes frames 1
unsigned int 4 m_iFrameCount Track frame count 1 to MAX_FRAMES 1
char[] m_iChannelsAvailable m_iFrameCount Pattern indices in a given frame 0 to MAX_PATTERN - 1 1
char 1 data: track pattern data 0x05 Pattern data indicator 1
unsigned int 4 Pattern size 1
char 1 Pattern count Pattern channel index 1
char 1 ^ Pattern index 1
uint16 2 ^ Pattern data count 0 to MAX_PATTERN_LENGTH 1
char[] ^ Row data See row data format. 1

Row data format

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char 1 Pattern data count Row index 1
char 1 ^ Pending effect bitflag 4321 xIVN = Effect on col 1/2/3/4, Instrument, Volume, and Note 1
char 1 ^ Note index 0 to NOTE_COUNT Only present when corresponding bitflag is set 1
char 1 ^ Instrument index 0 to MAX_INSTRUMENTS Only present when corresponding bitflag is set 1
char 1 ^ Volume index 0 to MAX_VOLUME Only present when corresponding bitflag is set 1
char 1 ^ Column 1 effect index EF_SPEED to EF_COUNT - 1 Only present when corresponding bitflag is set 1
char 1 ^ Column 1 effect parameter Only present when corresponding bitflag is set 1
char 1 ^ Column 2 effect index EF_SPEED to EF_COUNT - 1 Only present when corresponding bitflag is set 1
char 1 ^ Column 2 effect parameter Only present when corresponding bitflag is set 1
char 1 ^ Column 3 effect index EF_SPEED to EF_COUNT - 1 Only present when corresponding bitflag is set 1
char 1 ^ Column 3 effect parameter Only present when corresponding bitflag is set 1
char 1 ^ Column 4 effect index EF_SPEED to EF_COUNT - 1 Only present when corresponding bitflag is set 1
char 1 ^ Column 4 effect parameter Only present when corresponding bitflag is set 1

Notes

  • Information is based on module binary analysis
  • Added in FamiTracker 0.5.0 beta 10, this replaces the HEADER, FRAMES, and PATTERNS block.
  • More research is needed.

Instruments block

Block ID: INSTRUMENTS

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
int 4 m_pInstrumentManager->GetInstrumentCount() Instrument count 0 to MAX_INSTRUMENTS Count of existing instruments 1+
int 4 Per instrument Instrument index Instrument index 0 to MAX_INSTRUMENTS - 1 1+
char 1 ^ m_pInstrumentManager->GetInstrument()->m_iType Instrument type enum inst_type_t See table. 1+
CInstrument size of CInstrument object ^ m_pInstrumentManager->GetInstrument() Instrument definition See Dn-FT instrument format. 1+
int 4 ^ strlen() of m_pInstrumentManager->GetInstrument()->GetName() Instrument name length 0 to INST_NAME_MAX 1+
char[] Instrument name length ^ m_pInstrumentManager->GetInstrument()->GetName() Instrument name 1+

Notes

  • See Dn-FT instrument format for instrument file implementation.
  • This format is shared between 2A03, VRC6, N163, and S5B instruments.
  • In 0CC-FamiTracker and its forks, this format was converted into a subclass of CInstrument, CSeqInstrument to deduplicate code.
  • If FDS is used then version must be at least 4 or recent files won't load
  • This block is only written if any instruments exist
  • v6 adds DPCM delta settings.
  • TODO: investigate additional changes in v8 and v9.

Instrument types

Chip Index
2A03 0x01
VRC6 0x02
VRC7 0x03
FDS 0x04
N163 0x05
S5B 0x06
Base instrument format
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
int 4 SEQ_COUNT Sequence count enum sequence_t Number of defined sequence types.
Volume, Arpeggio, Pitch, Hi-Pitch, Duty cycle		 1+
char 1 Per SEQ_COUNT CSeqInstrument::m_iSeqEnable[] 0 = sequence is disabled, 1 = sequence is enabled enum sequence_t If sequence is disabled, sequence index reference is still stored 1+
char 1 ^ CSeqInstrument::m_iSeqIndex[] Sequence index enum sequence_t Reference to sequence data in SEQUENCES block. 1+
Notes
  • Information is based on CSeqInstrument::Store()
2A03 instruments
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
CSeqInstrument size of CSeqInstrument See Base instrument format. 1+
int 4 CInstrument2A03::GetSampleCount() DPCM sample assignment count 0 to MAX_DSAMPLES 7+
char 1 DPCM sample assignment count Note DPCM sample assignment note index 0 to NOTE_COUNT - 1 Written only when a sample exists at that note. 7+
char 1 ^ CInstrument2A03::m_cSamples[Octave][Note] DPCM sample assignment index 0 to MAX_DSAMPLES Written only when a sample exists at that note in FT 050b1+. 1+
char 1 ^ CInstrument2A03::m_cSamplePitch[Octave][Note] DPCM sample pitch 0x0 to 0xF Written only when a sample exists at that note in FT 050b1+. 1+
char 1 ^ CInstrument2A03::m_cSampleDelta[Octave][Note] DPCM delta offset of a given note Written only when a sample exists at that note in FT 050b1+. 6+
Notes
  • Information is based on CInstrument2A03::Store()
  • Only 72 notes are defined in version 1. Version 2+ has all 96 notes defined.
  • In FamiTracker 0.5.0 beta, the DPCM format has been changed to only count notes with DPCM assignments.
VRC6 instruments
Notes
  • Information is based on CSeqInstrument::Store()
  • Similar to 2A03 instruments but with no special considerations for DPCM
VRC7 instruments
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
int 4 CInstrumentVRC7::m_iPatch VRC7 patch number Hardware patch number of the instrument. 2+
char[8] 8 CInstrumentVRC7::m_iRegs[] Custom patch settings Patch settings of hardware patch 0. 2+
Notes
  • Information is based on CInstrumentVRC7::Store()
FDS instruments
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char[WAVE_SIZE] WAVE_SIZE CInstrumentFDS::m_iSamples[] Wave data 3+
char[MOD_SIZE] MOD_SIZE CInstrumentFDS::m_iModulation[] Modulation table 3+
int 4 CInstrumentFDS::m_iModulationSpeed Instrument modulation rate 3+
int 4 CInstrumentFDS::m_iModulationDepth Instrument modulation depth 3+
int 4 CInstrumentFDS::m_iModulationDelay Instrument modulation delay 3+
char 1 CInstrumentFDS::SEQUENCE_COUNT CSequence::m_iItemCount Sequence item count 0 to 255 3+
int 4 ^ CSequence::m_iLoopPoint Sequence loop point -1 toSeqCount - 1 3+
int 4 ^ CSequence::m_iReleasePoint Sequence release point -1 toSeqCount - 1 4+
int 4 ^ CSequence::m_iSetting Sequence setting type seq_setting_t 4+
char[] Sequence item count ^ CSequence::m_cValues[Index] Sequence data 3+
Notes
  • Information is based on CInstrumentFDS::Store(), CInstrumentFDS::StoreSequence()
  • Unlike other chips, FDS instruments do not store sequences inside their own dedicated block yet
  • FDS instruments stores its own sequences via CInstrumentFDS, child class of CSeqInstrument
    • only stores 3 types, Volume, Arpeggio, and Pitch.
    • version 2 apparently does not have Pitch sequences
  • In version 3, volume range was 0-15. Later versions have volume ranges from 0-31.
  • In version 2, FDS sequences were stored incorrectly?
N163 instruments
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
CSeqInstrument size of CSeqInstrument See Base instrument format. 1+
int 4 m_iWaveSize N163 wave size 4 to MAX_WAVE_SIZE In FT 0.5.0 beta, m_iWaveSize is determined by m_iWaveCount / remaining_bytes 2-6
int 4 m_iWavePos N163 wave position 0 to MAX_WAVE_SIZE - 1 Ignored if m_bAutoWavePos is enabled 2-6
int 4 m_bAutoWavePos Automatic wave data RAM allocation 0, nonzero 8+
int 4 m_iWaveCount N163 wave count 1 to MAX_WAVE_COUNT 2+
char[m_iWaveSize] m_iWaveSize m_iWaveCount m_iSamples[MAX_WAVE_COUNT][MAX_WAVE_SIZE] N163 wave sample 0 to 0xF 2+
Notes
  • Information is based on CInstrumentN163::Store() and instrument file binary analysis
  • Automatic wave data RAM allocation feature is from FT 0.5.0 beta.
  • Fifth sequence type is named Wave Index.
S5B instruments
Notes
  • Information is based on CSeqInstrument::Store()

Sequences block

Block ID: SEQUENCES

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
int 4 Count 2A03 sequence count 0 to MAX_SEQUENCES - 1 Only used sequences are counted 1+
int 4 Per 2A03 sequence count Index Sequence index 0 to MAX_SEQUENCES - 1 1+
int 4 ^ Type Sequence type 0 to SEQ_COUNT - 1 See table. 2+
char 1 ^ SeqCount Sequence run count 0 to MAX_SEQUENCES_ITEMS - 1 SeqCount has a different meaning in version 1-2 1-2
char[] SeqCount * 2 (number of runs) ^ Value, Length Sequence value, run length-1 RLE encoded sequence data? 1-2
char 1 ^ SeqCount Sequence item count 0 to MAX_SEQUENCES_ITEMS - 1 Size of sequence data 3+
int 4 ^ LoopPoint Sequence loop point -1 to SeqCount -1 if it doesn't exist 3+
int 4 ^ ReleasePoint Sequence release point -1 to SeqCount -1 if it doesn't exist 4, 7
int 4 ^ Settings Sequence setting seq_setting_t See table. 4, 7
char[] SeqCount (length of sequence) ^ Value Sequence value 3+
int 4 Per 2A03 sequence ReleasePoint Sequence release point -1 to SeqCount - 1 Version 5 saved the release points incorrectly, fixed in ver 6. -1 if it doesn't exist 5-6
int 4 ^ Settings Sequence setting seq_setting_t 5-6

Sequence type

Value 0 1 2 3 4
Type Volume Arpeggio Pitch Hi-pitch Duty / Noise (resp. Pulse width)

Sequence arpeggio type (only in version 4)

Value 0 1 2 0?
Type Absolute Fixed Relative Sequence is not an arpeggio sequence

Source: http://famitracker.com/wiki/index.php?title=FamiTracker_module#SEQUENCES

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Header(), CFamiTrackerDoc::ReadBlock_Sequences()
  • This stores 2A03 sequences.
  • in FamiTracker 0.5.0 beta 10, this is only saved when any sequences exist in the module.
  • in FamiTracker 0.5.0 beta 10, the sequence release point and setting has shifted back to version 4's place.

Frames block

Block ID: FRAMES

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
unsigned int 4 m_iFrameCount Frame count 0 to MAX_FRAMES Only one song is available. 1
unsigned int 4 m_iChannelsAvailable Channel count 0 to MAX_CHANNELS Moved to PARAMS block. Only one song is available. 1
char 1 m_iChannelsAvailable * m_iFrameCount Pattern Pattern indices 0 to MAX_PATTERN - 1 Only one song is available. 1
unsigned int 4 Track count m_iFrameCount Track frame count 1 to MAX_FRAMES 2-3
unsigned int 4 ^ m_iSongSpeed Track default speed 0 to MAX_TEMPO 3
unsigned int 4 ^ m_iSongTempo Track default tempo 0 to MAX_TEMPO In block version 2, this either sets the tempo or the speed, depending if Speed < 20. In block version 3+, this exclusively sets the speed. 2-3
unsigned int 4 ^ m_iPatternLength Track default row count 1 to MAX_PATTERN_LENGTH Length of patterns (in length) 2-3
char[] m_iChannelsAvailable * m_iFrameCount ^ Pattern Pattern indices 0 to MAX_PATTERN - 1 1-3

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Header(), CFamiTrackerDoc::ReadBlock_Frames()
  • This stores frame row data, which is an array of pattern indices, of which has length channel count.
  • in FamiTracker versions 0.2.5 and below, there was only one song per module, so the frame data was exclusive to one song only.
  • replaced by TRACK block in FamiTracker 0.5.0 beta 10

Patterns block

Block ID: PATTERNS

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
unsigned int 4 m_iPatternLength Pattern data count 0 to MAX_PATTERN_LENGTH Moved to FRAMES block 1
unsigned int 4 Track count Track Pattern track index 0 to MAX_TRACKS - 1 In version 1, there was only one track per module. 2+
unsigned int 4 ^ Channel Pattern channel index 0 to MAX_CHANNELS - 1 1+
unsigned int 4 ^ Pattern Pattern index 0 to MAX_PATTERN - 1 1+
unsigned int 4 ^ Items Pattern data count 0 to MAX_PATTERN_LENGTH 1+
char[] Items * Row Data size ^ Row data (see section below) 1+

Row Data

Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
unsigned int 4 Items Row Row index 0x0000 to 0x00FF 1-5
char 1 ^ Row Row index 0x00 to 0xFF In file version 0x0200 or block versions 6+, this is a char type instead. 6+
char 1 ^ Note Note value note_t Blank note is indicated with value NONE 1+
char 1 ^ Octave Octave value 0 to OCTAVE_RANGE - 1 Blank octave is indicated with value 0 1+
char 1 ^ Instrument Instrument index 0 to MAX_INSTRUMENTS Instrument indices equal to the hold note index will not be assigned to the pattern. Blank instrument is indicated with value MAX_INSTRUMENTS 1+
char 1 ^ Vol Channel volume 0 to MAX_VOLUME Blank volume is indicated with value MAX_VOLUME 1+
char[] m_iEffectColumns of current channel * 2 ^ Effect data (see section below) In block versions 1-5, all effect columns were stored even if they are unused. 1+
Effect data
Data type Unit size (bytes) Repeat Object/relevant variable in code Description Valid range Notes Present in block version
char 1 m_iEffectColumns of current channel EffectNumber Effect index EF_NONE to EF_COUNT - 1 1+
char 1 ^ EffectParam Effect parameter 0x00 to 0xFF On block versions 6+, this is present only if effect index is nonzero. 1+

Notes

  • Information is based on CFamiTrackerDoc::WriteBlock_Patterns, CFamiTrackerDoc::ReadBlock_Patterns, and http://famitracker.com/wiki/index.php?title=FamiTracker_module#PATTERNS
  • replaced by TRACK block in FamiTracker 0.5.0 beta 10
  • Support for multiple tracks was added in block version 2
  • Most versions are due to changes in effect commands, than the pattern format:
    • if data was from block versions 2 and below:
      • convert 1xx and 2xx in previous versions into 3xx
        • if effect index was 0x07, convert to EF_PORTAMENTO and set parameter to 0
        • if effect index was 0x06, interpret as EF_PORTAMENTO and increment parameter if it's less than 0xFF
    • if data was from block version 3:
      • inverts 1xx and 2xx effects in VRC7 channels
      • adjust FDS pitch effects by inverting the parameter value if not 80
    • if data was from block versions 5 and below:
      • raise all FDS notes by 2 octaves
    • if data was from file version 0x0200:
      • adjust off-by-one EF_SPEED if parameter is less than 20
      • adjust off-by-one volume command (set 0 to MAX_VOLUME, otherwise decrement and clamp within `0x0F)
      • set instrument to blank (MAX_INSTRUMENTS) if note is zero
    • if a EF_SAMPLE_OFFSET was found in an N163 channel, it gets converted to EF_N163_WAVE_BUFFER
    • if a module is a Dn-FamiTracker module or has a file version lower than 0x450, parse effects as FT 050B+ effect ordering

DPCM Samples block

Block ID: DPCM SAMPLES

Comments block

Block ID: COMMENTS

Expansion blocks

VRC6 Sequences block

Block ID: SEQUENCES_VRC6

N163 Sequences block

Block ID: SEQUENCES_N163
Previous block ID: SEQUENCES_N106

S5B Sequences block

Block ID: SEQUENCES_S5B

0CC-FamiTracker extension blocks

Extra Parameters block

Block ID: PARAMS_EXTRA

Detune Tables block

Block ID: DETUNETABLES

Grooves block

Block ID: GROOVES

Bookmarks block

Block ID: BOOKMARKS

Dn-FamiTracker extension blocks

JSON block

Block ID: JSON

Emulation Parameters block

Block ID: PARAMS_EMU

Dn-FamiTracker - NES/Famicom sound tracker
Copyright (C) 2020-2025 D.P.C.M.

FamiTracker Copyright (C) 2005-2020 Jonathan Liss

0CC-FamiTracker Copyright (C) 2014-2018 HertzDevil

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