七麦数据

High-Precision Morse Code Decoder

Achieve noise-resistant, accurate Morse code decoding with high-precision, sample-level signal processing. Try the superior “listening performance” in the free version.

Differences Between Free and Full Versions
This app lets everyone try the high-performance decoding engine for free.

Free Version
- Continuous decoding: Up to 3 minutes per session (restart anytime, unlimited times)
- Basic font display
Ideal for testing performance and checking short communications.

Full Version (Paid Add-on)
- Unlimited time: For long ragchews and continuous monitoring
- Font settings: Customize font type and size for better visibility
Recommended for active operation and a stress-free learning experience.

Main Features & Technology

High-Precision Real-Time Decoding
- Speed range: 5–50 WPM (auto-adjust speed and threshold)
- Frequency detection: 400–900 Hz (automatically tracks the strongest signal)

Advanced Signal Processing
- Bandpass filter: Narrowband filtering reduces unwanted noise
- AGC (Automatic Gain Control): Compensates for signal level changes and fading
- Noise blanker: Reduces spike noise using MAD (Median Absolute Deviation)
- Signal stabilization: Multi-sample buffering helps prevent false detections

Designed for Real-World Use
- Scrollable text: Review and check missed content
- Frequency lock: Tracks the actual operating frequency range (400–900 Hz)
- Visual support: On-screen text supports listening and copying

Recommended For

Morse Code Beginners
Great for those getting started with Morse code. Seeing decoded text while listening helps self-correction and improves learning efficiency.

Amateur Radio Operators
- CW practice: Compare results with your own copying to find weak points
- Contests: Helpful for high-speed reception support and log checking
- Portable ops: No PC needed—build a CW reception setup with just a smartphone

Comeback Hams & Experts
Useful for reducing fatigue during long monitoring sessions and supporting operators with hearing decline. Powerful filtering helps decoding in weak-signal or interference conditions.

Note: Microphone permission is used only for signal analysis. No audio is saved or transmitted.

This app is a tool that uses the smartphone's microphone to analyze real-time Morse code signals and automatically decode them into characters. It supports international Morse code, including letters, numbers, and common symbols. Featuring BPF, AGC and noise blanker implementations, it is designed with real-world operational scenarios in mind.

Recommended for:
• Those who are new to Morse code and want to give it a try
• Those who want to use a decoder for CW (Continuous Wave) practice
• Those looking for a visualization tool for contests or reception training