Spectrogram Maker
Choose an MP3 or WAV, see its frequencies over time, and save the spectrogram as a PNG. Processing stays in your browser.
Bring a sound into view.
A voice, a piano note, the world outside your window.
MP3 or WAV · Up to 20 MB · First 30 seconds · Processed on your device
Download PNG without signing in. Files are generated on your device.
Single-melody pitch detection. Chords and full mixes may need substantial editing.
How do I make a spectrogram online for free?
Choose an MP3 or WAV from your device in the spectrogram maker above. DrawMusic analyzes the first 30 seconds of a file up to 20 MB and displays its frequency picture. Download the result as a free PNG without signing in. The recording is decoded and analyzed locally in your browser.
How do I read a spectrogram?
Read time from left to right and frequency from bottom to top. Brighter areas show stronger energy. Horizontal bands can indicate sustained notes and their harmonics; vertical bursts can indicate note attacks or percussion. Several bands do not necessarily mean several instruments: a single note can contain many harmonics.
What is a spectrogram useful for?
Use it to see how pitch and frequency energy change in a voice, instrument, or short sound. Compare a sustained note with a short attack, or inspect a melody before correcting detected notes. A spectrogram is a visual guide; it does not identify every instrument or automatically produce sheet music.
FAQ
Is my audio uploaded to a server?
No. The selected audio is processed on your device. DrawMusic does not send the recording to a server for spectrogram generation or pitch detection.
Can I make a spectrogram of a full song?
You can choose a longer file if it is within the 20 MB limit, but only its first 30 seconds are analyzed. For another passage, trim the recording before selecting it.
What is the difference between a spectrogram and a waveform?
A waveform shows signal amplitude over time. A spectrogram separates the signal into frequencies and shows their energy over time, making pitch bands and harmonics easier to see.
Can I turn the spectrogram into MIDI?
Use Audio to MIDI to estimate notes from a clear single melody. The detector estimates one pitch at a time, so a full mix or chords may produce incorrect notes. Inspection, PNG downloads and MIDI downloads are free and need no sign-in.