Complete guide to using the advanced Morse code audio decoder
Professional signal processing for accurate CW recognition
Drag and drop or select your CW audio file (up to 50MB)
Set WPM range, frequency range, and detection parameters
Click "Analyze Audio" to process and decode the CW signals
View decoded text, save results, or copy to clipboard
Set expected speed range. Narrower ranges improve accuracy.
Match your CW signal frequency. Common ranges: 300-1000Hz.
Higher values filter more noise but may miss weak signals.
Reduces jitter in signal detection. Higher for noisy audio.
Automatically determines WPM from timing analysis.
Recognizes amateur radio prosigns (AR, SK, BT, etc.)
The estimated speed based on dot timing analysis. More accurate with consistent keying.
The dominant frequency in your CW signal. Should match your transmitter's tone.
Signal-to-noise ratio estimate (0-100%). Higher values indicate cleaner audio.
Overall accuracy estimate based on timing consistency and character recognition.
Morse patterns that couldn't be decoded. May indicate noise or non-standard timing.
Special CW procedures enclosed in angle brackets when detected.
Uploaded files are stored temporarily on our server for analysis only. Files are automatically deleted after 7 days.
We don't analyze, store, or share the content of your decoded text. Your CW practice remains private.