An incoming transmission
Tap the stamp. It plays as it arrives, letter by letter — turn your sound on.
Type a line and it goes out as International Morse — each letter rings its own pentatonic pitch instead of one flat beep. Learn the alphabet the Koch way, two letters at a time, or key your own Morse on a straight key and watch it decode live.
Send a transmission
Write up to 120 characters. It plays as tuneful Morse at the WPM above, and the tape below shows the dots and dashes as they land.
Link copied — anyone who opens it hears your transmission decode.
Only a sorted handful of the pitches used — never the words, never the order — joins the town chord on /keyboard-signal. The message itself travels in the link, after the #, which browsers never send to a server.
Learn the alphabet, two letters at a time
The Koch method: you only ever practice at full speed, but with a tiny alphabet that grows. Get 18 of the last 20 right and a new letter joins the pool.
Now learning
0 / 20 this round
First run: press ▶ to hear a letter from the pool, then type it. Get it right or wrong, the pattern always shows after.
Key your own Morse
Hold Space, or press and hold the key below. Timing is read relative to the WPM above and adapts to your rhythm as you go.
Key this word
reading at ~15 wpm
Decoded
A short press is a dit, a long one a dah. Pause a little and the letter locks in; pause longer and a space opens up.
Keying here counts toward the town signal as a keystroke total — never which symbols, never the decoded words.