How is the timing calculated?

It follows the PARIS standard. One dit (dot) lasts 1.2 divided by the words-per-minute setting, in seconds. A dash is three dits, the gap inside a letter is one dit, between letters three dits, and between words seven dits.

What characters can it encode?

All 26 letters, the digits 0 through 9, and common punctuation including period, comma, question mark, slash, parentheses, and the at sign. Unsupported characters are skipped. Spaces become word gaps.

Does it actually make sound?

Yes. It synthesises sine-wave tones live with the Web Audio API rather than playing a recording. Short fade-in and fade-out ramps on each beep avoid the clicking you would otherwise hear at tone edges.

Why does nothing play on the first click sometimes?

Browsers require a user gesture before audio can start. Because you press the Play button, the audio context is created on that click, so it should work. If you hear nothing, check your system volume and that the tab is not muted.

What speed should beginners use?

Many learners use the Farnsworth idea of fast characters with longer gaps, but a simple start is 10 to 13 words per minute at a clear pitch around 600 hertz. Increase the WPM slider gradually as your ear improves.

Morse Code Audio Player

Reading Morse on paper is one thing; recognising it by ear is another. This player turns your text into Morse and plays it as real audio tones, so you can practise listening, test a key’s timing, or just hear what a message sounds like in code.

How it works

Each character is looked up in the international Morse table and turned into a string of dots and dashes. Playback timing uses the PARIS standard, where one dit equals 1.2 / WPM seconds:

dit       = 1.2 / wpm        (seconds)
dot       = 1 dit tone
dash      = 3 dit tone
in-letter gap   = 1 dit
between-letter  = 3 dit
between-word    = 7 dit

Tones are generated by scheduling Web Audio oscillator notes at the right times and durations, with tiny volume ramps to prevent clicks.

Tips and notes

Pick a comfortable pitch — around 600 Hz is traditional for CW practice — and start slow. Increasing speed while keeping the pitch fixed trains your ear to hear each letter as a single rhythm rather than counting individual beeps. The text translation stays visible so you can follow along, then look away and test whether you can copy by sound alone.