Online FM Recorder

Generate and record FM radio-like audio directly in your browser with customizable frequency and modulation settings.

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About This Tool

This online FM recorder allows you to create and record frequency-modulated audio signals in real-time using Web Audio API. Adjust carrier frequency, modulation frequency, and depth to simulate FM radio sounds. Visualize the waveform, record high-quality audio, and download in WAV or MP3 format. Perfect for sound design, testing, or educational purposes.

Save your calculation history with a free account

How to Use

Set the carrier frequency (e.g., 440 Hz for A4 note) and modulation frequency/depth to shape the sound.
Click 'Generate Sound' to hear the FM synthesis.
Use 'Start Recording' to capture audio, with real-time visualization.
Stop recording and click 'Save Recording' to process and download the audio file.
Access previous recordings in the file management section.

Frequently Asked Questions

Find Quick Answers

What is FM synthesis?

Frequency modulation (FM) synthesis uses one audio signal (modulator) to vary the frequency of another (carrier), creating complex timbres similar to FM radio.

What audio formats are supported?

Recordings are saved as WAV files by default, with optional MP3 conversion via server-side processing for smaller file sizes.

Does this tool require an internet connection?

Yes, for initial loading and server-side features like file conversion, but basic synthesis and recording work offline once loaded.

Is there a time limit for recordings?

No, you can record for as long as your browser memory allows, though very long recordings may affect performance.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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