{ "slug": "midi-track-splitter", "name": "gizza-ai/midi-track-splitter", "version": "0.1.0", "title": "MIDI Track Splitter — split a .mid file into separate tracks — gizza.ai", "description": "Split a multi-track MIDI file into separate single-track .mid files, one per track or per channel. Tempo and time signature are copied into every part.", "tags": [ "midi track splitter", "split midi file", "midi splitter", "separate midi tracks", "extract track from midi", "split midi by channel", "midi to single track files", "midi stem export" ], "category": "audio", "urls": { "page": "https://gizza.ai/tools/midi-track-splitter/", "markdown": "https://gizza.ai/tools/midi-track-splitter/index.md", "descriptor": "https://gizza.ai/tools/midi-track-splitter/tool.json", "deep_link_example": "https://gizza.ai/tools/midi-track-splitter/?input=4d546864000000060001000300604d54726b0000002000ff0309436f6e647563746f7200ff510307a12000ff58040402180800ff2f004d54726b0000002000ff03055069616e6f00c00000903c4060903c00009040466090400000ff2f004d54726b0000001800ff03044261737300c12100912464814091240000ff2f00&encoding=auto&split_by=track&include_conductor=true&output_format=format-0&skip_empty=true&select=leave%20empty%20for%20every%20part&filename_prefix=part&output=files" }, "cli": "gizza tool midi-track-splitter \"4d546864000000060001000300604d54726b0000002000ff0309436f6e647563746f7200ff510307a12000ff58040402180800ff2f004d54726b0000002000ff03055069616e6f00c00000903c4060903c00009040466090400000ff2f004d54726b0000001800ff03044261737300c12100912464814091240000ff2f00\"", "tool": { "description": "Split one multi-track Standard MIDI File (.mid) into separate single-part MIDI files and return each as a downloadable `data:audio/midi;base64,…` URL alongside a table of what it contains. `input` is the file's bytes as base64 or hex. `split_by` picks the cut: 'track' (default) gives one file per track chunk — how a DAW-exported Format 1 file is organised — and 'channel' gives one file per MIDI channel, gathered across every track (a Format 0 file has a single track, so it is always cut by channel). Every note-on, note-off, velocity, controller, pitch bend and program change is carried through unchanged at its original tick, and the source division is preserved, so nothing is re-gridded. `include_conductor` (default true) copies the tempo, time signature, key signature and SMPTE offset into each part — without them an exported part plays at the MIDI default 120 BPM in 4/4 — and never duplicates an event the part already had. `output_format` writes each part as 'format-0' (one merged track, default) or 'format-1' (conductor track + part track). `skip_empty` (default true) drops parts with no notes, which is what removes the tempo-only conductor track. `select` exports a subset by 1-based track number or channel number, e.g. '1,3-5'. Filenames are built from each part's track name, or its General MIDI instrument, as `--.mid`. Set `output` to 'list' to see the parts table without the file bytes. Limits: 4 MiB decoded input and at most 64 output files. Pure compute — nothing is fetched, uploaded or stored.", "parameters": { "additionalProperties": false, "properties": { "encoding": { "default": "auto", "description": "How `input` is encoded: 'auto' (default) reads it as hex when it is all hex digits with an even length, otherwise base64; 'base64'; or 'hex'.", "enum": [ "auto", "base64", "hex" ], "type": "string" }, "filename_prefix": { "default": "part", "description": "First word of each suggested download name (default 'part'), which is built as `--.mid`, e.g. 'part-02-bass.mid'. Anything that is not a letter or digit becomes a hyphen.", "type": "string" }, "include_conductor": { "default": true, "description": "Copy the conductor data — tempo, time signature, key signature and SMPTE offset — into every output file (default true). Leave it on: those events normally live in track 0 only, so a part exported without them plays back at the MIDI default 120 BPM in 4/4. Events a part already carries are never duplicated.", "type": "boolean" }, "input": { "description": "The Standard MIDI File (.mid/.midi) bytes as a base64 or hex string. The data must start with a standard `MThd` header chunk (Format 0/1/2) and be at most 4 MiB. Whitespace, and `:`/`-` separators in hex, are ignored.", "type": "string" }, "output": { "default": "files", "description": "How much to return: 'files' (default) the table of parts plus each part's complete .mid bytes as a `data:audio/midi;base64,…` URL; 'list' only the table — part name, source track/channel, instrument, note count and length — which is the quick way to see what is inside a file before exporting it.", "enum": [ "files", "list" ], "type": "string" }, "output_format": { "default": "format-0", "description": "How each output file is written: 'format-0' (default) merges the conductor data and the part into ONE track, a genuinely single-track file; 'format-1' keeps the conductor data as its own first track with the part second. Both preserve the source division (ticks per quarter note or SMPTE timecode) exactly.", "enum": [ "format-0", "format-1" ], "type": "string" }, "select": { "default": "", "description": "Which parts to export, as 1-based numbers and ranges, e.g. '1,3-5'. Empty (default) exports every part. The numbers are TRACK numbers when `split_by` is 'track' (track 1 is the first chunk in the file) and MIDI CHANNEL numbers 1-16 when it is 'channel'.", "type": "string" }, "skip_empty": { "default": true, "description": "Skip parts that contain no notes (default true) — that is what drops the conductor/tempo track itself, and any muted or placeholder track. Set false to export every track, empty ones included.", "type": "boolean" }, "split_by": { "default": "track", "description": "What each output file holds: 'track' (default) one file per track chunk, the usual cut for a Format 1 file exported by a DAW; 'channel' one file per MIDI channel, gathering that channel's events from every track. A Format 0 file has only one track, so it is always split by channel.", "enum": [ "track", "channel" ], "type": "string" } }, "required": [ "input" ], "type": "object" } } }