PureMIDI | Audio to MIDI
PureMIDI is an AI-powered online tool that converts audio recordings into MIDI files directly in the browser. Users upload audio files (MP3, WAV, M4A, FLAC, OGG, WEBM, AAC, up to 12MB) and choose between two conversion modes: Quick Melody and Pro Song. Quick Melody mode uses the Basic Pitch engine to transcribe monophonic or solo instrument lines into a single-track MIDI file, costing 1 credit. Pro Song mode leverages Google's MT3 model to transcribe full mixed audio into a multi-track MIDI file (separating melody, bass, chords, drums, etc.), costing 6-15 credits based on audio length. The AI detects pitch, timing, and velocity, providing an editable MIDI draft that can be downloaded and further refined in any DAW. The tool includes instrument-specific guides for guitar, piano, and DAW integration, and it provides accuracy tips for optimal results (e.g., using lossless formats, avoiding heavy reverb). PureMIDI operates on a freemium model, granting 2 free credits upon signup, with additional credits available for purchase. No software installation or plugin is required; everything runs in the browser. PureMIDI's conversion engine is tuned for different scenarios: the single-pitch mode excels with clean vocals, guitar, or monophonic instruments, while the full-song mode handles dense mixes and polyphonic content like piano chords. The output is a standard .mid file compatible with popular DAWs such as Logic Pro, Ableton Live, FL Studio, and Cubase. The platform also provides real conversion examples for users to preview the quality before committing credits. The service is designed for speed and simplicity, with uploads being temporary and processing done entirely on the server side after upload. In addition to the core conversion, PureMIDI offers educational resources on audio format quality and its impact on transcription accuracy. It includes a table comparing formats like WAV, FLAC, MP3, and M4A, guiding users to achieve the best results. The website also feature
- Category
- Voice & Audio
- Pricing
- Freemium
Problem solved
Musicians, producers, and educators often need to convert audio recordings into MIDI for editing, notation, or creative rearrangement. Manual transcription from audio is tedious, time-consuming, and requires musical expertise. PureMIDI solves this by providing an AI-powered, browser-based tool that automatically transcribes audio into MIDI with pitch, timing, and velocity detection, generating a ready-to-edit file in seconds, without any software installation.
Use cases
- Transcribe a solo vocal or instrument recording into MIDI for arrangement or notation in a DAW.
- Hum a melody or play a riff and instantly get an editable MIDI starting point for music production.
- Convert student performance recordings to MIDI for music education purposes such as analysis and grading.
- Extract multi-track MIDI from a full song to use as a remix foundation, then swap sounds and restyle.
- Convert polyphonic piano recordings into separate MIDI tracks for further editing or study.
- Quickly generate MIDI drafts from field recordings or voice memos for idea capture.
Audience
- Content Creators
- Hobbyists
- Researchers
Pros
- AI-powered transcription provides high accuracy on clean, monophonic audio.
- Two distinct modes cater to both simple melodies and complex full mixes, yielding single-track or multi-track MIDI.
- Operates entirely in the browser with no installation, plugins, or subscriptions required.
- Supports a wide range of audio formats with clear guidance on format quality for best results.
- Offers instrument-specific guides and DAW integration tips to streamline workflows.
Cons
- Accuracy drops significantly on recordings with heavy reverb, noise, or dense overlapping sounds.
- Full-song mode consumes more credits, making it costly for longer tracks or frequent use.
- File size limit of 12 MB may restrict use with high-resolution or long audio files.
- Limited free trial (2 credits) provides only minimal evaluation before requiring payment.
Official website: https://puremidi.com/audio-to-midi
Canonical LambdaBase page: https://www.lambdabase.com/tools/puremidi-audio-to-midi