Which audio formats can I upload?

MP3, WAV, FLAC, M4A, AAC, OGG, Opus, and WebM, up to 100 MB.

What is inside the ZIP?

MIDI, two CSV files (note events and pitch contour), SVG, JSON, and a README.

When should I choose Higher or Lower voice?

Use Higher voice to favor the upper line, Lower voice for the bass or lower part, and Balanced when the lead is already the most continuous path.

How well does it work on mixed recordings?

Mixed tracks are approximate. Isolated vocals or a single instrument are the most reliable sources.

What do onset threshold and frame threshold control?

Onset threshold (default 0.5) and frame threshold (default 0.3) gate how readily Basic Pitch accepts note starts and sustained frames; lower values detect more events, higher values are stricter.

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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.

Details

What this tool helps you do

Spotify Basic Pitch supplies polyphonic note candidates, then a continuity-aware path selector follows the most plausible dominant melody. If the model returns no usable events for a clearly monophonic signal, a bounded YIN/CMNDF tracker provides a local fallback. Mixed recordings are approximate; isolated vocal or single-instrument recordings are most reliable.

Execution

Run this tool

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Prepared example runs

Click an example to fill the form automatically. File inputs still need an upload.

2 examples

Follow an ascending melody above quiet harmony

Extract the dominant C4–D4–E4–G4 line while a quieter G3 distractor sounds underneath, then download the six analysis artifacts.

ZIP with MIDI, two CSV files, SVG, JSON, and README

Transcribe an isolated monophonic phrase

Analyze a clean four-note phrase with a higher-register preference and no pitch-bend export for a compact editable MIDI draft.

ZIP with an editable melody MIDI and contour reports

Inputs

Set the required fields, then run the tool.

7 options

FilesUpload source files for this workflow.1

Audio filefileRequired

Single file max size: 100 MBSupported types: audio/mpeg, audio/wav, audio/x-wav, audio/flac, audio/x-flac, audio/mp4, audio/x-m4a, audio/aac, audio/ogg, audio/webm, .mp3, .wav, .flac, .m4a, .aac, .ogg, .opus, .webm

SettingsAdjust formats, ranges, numbers, and modes.5

Onset thresholdnumberRequiredFrame thresholdnumberRequiredMinimum model note length (frames)numberRequiredMinimum selected note (ms)numberRequiredMelody preferenceselectRequired

TogglesEnable or disable optional behavior.1

Include pitch bendscheckboxOptionalEnabled when checked

Result

Ready for a run

Run the tool to preview files, text, structured data, or streamed output here.

Samples

Audio Melody Contour Extractor

What this tool helps you do

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Prepared example runs

Inputs

Result

Examples that match this tool

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Prepared example runs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Follow an ascending melody above quiet harmony

2. Transcribe an isolated monophonic phrase

FAQ

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Copyright-Free M4A Audio Samples

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3. Sketch a dry vocal melody