# Audio to Multitrack MIDI (Draft) Split a full mix into stems (drums/bass/other/vocals) and transcribe each to MIDI — a multi-track starting point for transcription > Canonical page: https://elysiatools.com/en/tools/audio-to-multitrack-midi - **Category:** Media - **Keywords:** audio, midi, transcription, multitrack, demucs, basic-pitch, stems, music, sheet, 扒谱 ## Overview Testing only: this resource-intensive tool accepts audio clips up to 20 seconds for every stem selection. It turns a full mix into a multi-track MIDI draft using two neural networks: HT-Demucs FT (ONNX) separates the audio into drums, bass, other instruments, and vocals; then Spotify's Basic Pitch (TensorFlow.js) transcribes each stem into MIDI notes. The stems are assembled into a single .mid file with one track per instrument. This is a draft / starting point for human transcription, not a perfect transcription. Expect missing notes, timing drift, and instrument bleed. Import the result into a DAW and clean it up by hand. Runs entirely in Node (no Python, no GPU). ## Inputs - **Audio File** (file): Upload an MP3, WAV, FLAC, M4A, OGG, or AAC file (testing only; max 20 seconds) - **Stems to Transcribe** (select) - **Onset Sensitivity** (number) - **Frame Sensitivity** (number) - **Min Note Length (frames)** (number) - **Include Pitch Bend** (checkbox) ## When to use - Create a starting MIDI transcription from a short full-mix recording. - Extract a vocal melody or other melodic material as MIDI notes. - Separate drums, bass, other instruments, and vocals into tracks for manual editing. ## How it works - Upload one MP3, WAV, FLAC, M4A, OGG, or AAC audio file up to 20 seconds. - Choose which stems to transcribe: all, vocals only, melody, or full minus drums. - Adjust onset sensitivity, frame sensitivity, minimum note length, and pitch-bend inclusion if needed. - The tool separates the audio, transcribes the selected stems, and returns one .mid file with a track for each instrument. ## Use cases - Music producers can turn a short mix into a multitrack MIDI starting point for arrangement and editing. - Songwriters can extract a vocal line or melody as MIDI for further composition work. - Musicians transcribing recordings can use separated drum, bass, instrument, and vocal tracks to speed up manual notation. ## Frequently asked questions ### What audio formats can I upload? You can upload MP3, WAV, FLAC, M4A, OGG, or AAC files. ### What is the maximum audio length? Audio clips are limited to 20 seconds. ### Which stems can the tool transcribe? You can select all stems, vocals only, melody, or full mix minus drums. ### Is the MIDI transcription exact? No. It is a draft and may contain missing notes, timing drift, and instrument bleed. ### What should I do with the MIDI output? Import the .mid file into a DAW and correct the notes and timing manually. ## Related tools - [Audio Melody Contour Extractor](https://elysiatools.com/en/tools/audio-melody-contour-extractor): Extract a dominant melody path from audio and export MIDI, note events, a pitch contour, SVG, and JSON in one ZIP. - [Batch Audio Converter](https://elysiatools.com/en/tools/audio-batch-converter): Convert multiple audio files between different formats like MP3, WAV, FLAC, AAC, OGG, Opus with quality settings and batch processing - [Audio Codec Swap](https://elysiatools.com/en/tools/audio-codec-swap): Change the codec of an audio file within a chosen output format - [Audio Chord Progression Detector](https://elysiatools.com/en/tools/audio-chord-progression-detector): Estimate an audio file's chord sequence locally and download CSV, JSON, SVG, and method notes in one ZIP. - [Audio to Text Transcriber (AI)](https://elysiatools.com/en/tools/audio-to-text-transcriber): Transcribe speech from audio (wav/mp3/m4a/flac/ogg/webm/aac) to text, SRT, VTT or JSON using the grok-stt AI model. Up to 10 minutes. - [Audio Format Converter](https://elysiatools.com/en/tools/audio-converter): Convert audio files between different formats like MP3, WAV, FLAC, AAC, OGG with quality settings and volume adjustment - [Audio Resample](https://elysiatools.com/en/tools/audio-resample): Change the sample rate of an audio file (e.g., 44.1kHz to 22.05kHz) - [Audio Channel Resample](https://elysiatools.com/en/tools/audio-channel-resample): Change the number of channels (mono/stereo) while keeping the same format ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free M4A Audio Samples](https://elysiatools.com/en/samples/m4a-samples): Apple iTunes compatible M4A audio samples with AAC encoding, optimized for quality and file size balance ## Related content - [Karaoke and Stem Separation Tools](https://elysiatools.com/en/hubs/karaoke-and-stem-separation-tools): Separate vocals and accompaniment, clean the resulting stems, set a controlled balance, and prepare a karaoke or remix-ready delivery.