Every known event ID, grouped by the part of the project it describes. Each group has a page of its own with what each event holds. The full list by number follows below.
Groups
Project
Version, tempo, title, author, comments and other project settings.
Channels
The channel rack: each channel, its sample, levels and filters, and display groups.
Patterns
Each pattern, its name and colour, notes and controller data.
Arrangements
Playlist arrangements, their items, tracks and time markers.
Mixer
Mixer settings, each insert, its routing and its effect slots.
Plugins
The name, colour, window and saved state of each plugin.
All events by ID
Event 172 (0xAC) breaks the size rule: its ID is in the dword range,
but it carries fewer than four bytes, and readers disagree on whether it carries one
byte or three. It has been seen in FL Studio 2025 files. See
Event 172. Its meaning is
unknown, so it is not listed below.
Events marked old are earlier forms that FL Studio 2024 and 2025 are not known to write. They are listed so that a reader recognises them and can step over them. Names are descriptive labels, not names used by FL Studio.
| ID | Class | Name | Group |
|---|---|---|---|
| 0x00 (0) | Byte | Channel enabled | Channels |
| 0x02 (2) | Byte | Channel volume old | Channels |
| 0x03 (3) | Byte | Channel pan old | Channels |
| 0x09 (9) | Byte | Loop active | Project |
| 0x0A (10) | Byte | Show info | Project |
| 0x0B (11) | Byte | Rack swing | Channels |
| 0x0C (12) | Byte | Main volume old | Project |
| 0x0D (13) | Byte | Rack fit to steps old | Channels |
| 0x0F (15) | Byte | Channel collapsed | Channels |
| 0x11 (17) | Byte | Time signature numerator | Arrangements |
| 0x12 (18) | Byte | Time signature beat | Arrangements |
| 0x14 (20) | Byte | Ping-pong loop | Channels |
| 0x15 (21) | Byte | Channel type | Channels |
| 0x16 (22) | Byte | Channel routed to insert | Channels |
| 0x17 (23) | Byte | Pan law | Project |
| 0x1A (26) | Byte | Pattern looped | Patterns |
| 0x1C (28) | Byte | Licensed | Project |
| 0x1D (29) | Byte | Plugin delay compensation | Mixer |
| 0x1E (30) | Byte | Play truncated notes | Patterns |
| 0x20 (32) | Byte | Channel locked | Channels |
| 0x21 (33) | Byte | Time marker numerator | Arrangements |
| 0x22 (34) | Byte | Time marker denominator | Arrangements |
| 0x40 (64) | Word | New channel | Channels |
| 0x41 (65) | Word | New pattern | Patterns |
| 0x42 (66) | Word | Tempo, whole BPM old | Project |
| 0x43 (67) | Word | Selected pattern | Patterns |
| 0x45 (69) | Word | Frequency tilt | Channels |
| 0x46 (70) | Word | Effect flags | Channels |
| 0x47 (71) | Word | Cutoff | Channels |
| 0x48 (72) | Word | Channel volume old | Channels |
| 0x49 (73) | Word | Channel pan old | Channels |
| 0x4A (74) | Word | Preamp | Channels |
| 0x4B (75) | Word | Fade out | Channels |
| 0x4C (76) | Word | Fade in | Channels |
| 0x50 (80) | Word | Main pitch | Project |
| 0x53 (83) | Word | Resonance | Channels |
| 0x55 (85) | Word | Stereo delay | Channels |
| 0x56 (86) | Word | Pogo | Channels |
| 0x59 (89) | Word | Time shift | Channels |
| 0x5D (93) | Word | Tempo, fine part old | Project |
| 0x5E (94) | Word | Channel children | Channels |
| 0x5F (95) | Word | Insert icon | Mixer |
| 0x61 (97) | Word | Channel swing | Channels |
| 0x62 (98) | Word | Slot index | Mixer |
| 0x63 (99) | Word | New arrangement | Arrangements |
| 0x64 (100) | Word | Selected arrangement | Arrangements |
| 0x80 (128) | Dword | Plugin colour | Plugins |
| 0x83 (131) | Dword | Ring modulation | Channels |
| 0x84 (132) | Dword | Cut group | Channels |
| 0x85 (133) | Dword | Rack window height | Channels |
| 0x87 (135) | Dword | Root note | Channels |
| 0x8A (138) | Dword | Delay modulation X and Y | Channels |
| 0x8B (139) | Dword | Reverb | Channels |
| 0x8C (140) | Dword | Stretch time old | Channels |
| 0x8E (142) | Dword | Fine tune | Channels |
| 0x8F (143) | Dword | Sampler flags | Channels |
| 0x90 (144) | Dword | Layer flags | Channels |
| 0x91 (145) | Dword | Channel display group | Channels |
| 0x92 (146) | Dword | Selected display group | Project |
| 0x93 (147) | Dword | Insert output | Mixer |
| 0x94 (148) | Dword | Time marker position | Arrangements |
| 0x95 (149) | Dword | Insert colour | Mixer |
| 0x96 (150) | Dword | Pattern colour | Patterns |
| 0x98 (152) | Dword | Loop position old | Arrangements |
| 0x99 (153) | Dword | AU sample rate | Channels |
| 0x9A (154) | Dword | Insert input | Mixer |
| 0x9B (155) | Dword | Plugin icon | Plugins |
| 0x9C (156) | Dword | Tempo | Project |
| 0x9F (159) | Dword | FL Studio build | Project |
| 0xA0 (160) | Dword | Pattern channel | Patterns |
| 0xA1 (161) | Dword | Unknown | Patterns |
| 0xA2 (162) | Dword | Unknown | Patterns |
| 0xA4 (164) | Dword | Pattern length | Patterns |
| 0xC0 (192) | Text | Channel name old | Channels |
| 0xC1 (193) | Text | Pattern name | Patterns |
| 0xC2 (194) | Text | Title | Project |
| 0xC3 (195) | Text | Comments | Project |
| 0xC4 (196) | Text | Sample path | Channels |
| 0xC5 (197) | Text | Web address | Project |
| 0xC6 (198) | Text | Comments in RTF old | Project |
| 0xC7 (199) | Text | FL Studio version | Project |
| 0xC8 (200) | Text | Licensee | Project |
| 0xC9 (201) | Text | Plugin internal name | Plugins |
| 0xCA (202) | Text | Data folder | Project |
| 0xCB (203) | Text | Plugin name | Plugins |
| 0xCC (204) | Text | Insert name | Mixer |
| 0xCD (205) | Text | Time marker name | Arrangements |
| 0xCE (206) | Text | Genre | Project |
| 0xCF (207) | Text | Artists | Project |
| 0xD1 (209) | Data | Channel delay | Channels |
| 0xD4 (212) | Data | Plugin wrapper | Plugins |
| 0xD5 (213) | Data | Plugin state | Plugins |
| 0xD7 (215) | Data | Channel parameters | Channels |
| 0xD9 (217) | Data | Playlist selection | Arrangements |
| 0xDA (218) | Data | Envelope and LFO | Channels |
| 0xDB (219) | Data | Channel levels | Channels |
| 0xDD (221) | Data | Polyphony | Channels |
| 0xDF (223) | Data | Pattern controllers | Patterns |
| 0xE0 (224) | Data | Pattern notes | Patterns |
| 0xE1 (225) | Data | Mixer parameters | Mixer |
| 0xE4 (228) | Data | Tracking | Channels |
| 0xE5 (229) | Data | Level adjustments | Channels |
| 0xE7 (231) | Text | Display group name | Channels |
| 0xE9 (233) | Data | Playlist items | Arrangements |
| 0xEA (234) | Data | Automation | Channels |
| 0xEB (235) | Data | Insert routing | Mixer |
| 0xEC (236) | Data | Insert flags | Mixer |
| 0xED (237) | Data | Timestamp | Project |
| 0xEE (238) | Data | Track data | Arrangements |
| 0xEF (239) | Text | Track name | Arrangements |
| 0xF1 (241) | Text | Arrangement name | Arrangements |