Audio Morse Code Translator

Morse code is sound before it is anything else — dots and dashes on paper are just sheet music for a tone you're meant to hear. This audio translator makes that immediate: type any text and it plays as clean, properly timed CW audio, with every parameter real operators care about — speed, tone pitch, Farnsworth spacing, waveform, volume — under your control. Then it closes the loop: download the audio as a WAV, or decode recordings back into text.

What "audio morse" really means

On the air, morse is transmitted as a continuous wave — a pure radio-frequency carrier switched on and off in dots and dashes. Nothing modulates it; there is no voice, no data packet. Your receiving equipment mixes that keyed carrier against a local oscillator, and the difference tone that falls in the audible range is the beep you hear. That's why every audio morse translator, this one included, models the signal as exactly one thing: a single sine tone, gated on and off at precise intervals. Master the intervals and you have mastered the mode.

The intervals are strictly proportional. One unit of tone is a dit; three units make a dah. Silence carries the grammar: one unit between elements of a letter, three between letters, seven between words. Speed is expressed as words per minute using the standard word PARIS, which averages out to exactly 50 units — so 15 WPM means one unit every 120 milliseconds. The translator above computes every on-off edge from these ratios; nothing is approximated.

Every playback parameter, explained

• Speed (5–40 WPM). How fast characters are keyed. Ham licensing exams historically sat at 5, 13 and 20 WPM; casual conversation lives at 13–18; contest exchanges fly at 25–35.
• Tone (300–1000 Hz). The pitch of the beep. Most operators settle between 500 and 700 Hz — high enough to cut through noise, low enough not to fatigue. 600 Hz is the classic default.
• Farnsworth timing. Characters are sent at full speed while the gaps between them stretch to a slower effective speed. This is the single most recommended learning configuration: your ear locks onto true letter rhythms instead of slow-motion distortions of them.
• Volume & waveform. Sine is the classic round tone; square adds harmonics that some learners find easier to pick out of noise at low volume. For decoding practice, keep volume moderate — you're training recognition, not endurance.
• Light & vibration. The same timeline can flash the screen or pulse a phone's vibrator, mirroring how signal lamps and buzzers carried the code before radio did.

A practical calibration loop: set 15 WPM, type a sentence you know by heart, play it with your eyes closed, then read the symbol-by-symbol output above while it replays. When hearing a letter and knowing it stop being two separate events, you've crossed the line from reciting to reading. The listening quiz measures exactly that skill.

The other direction: audio to text

Every few days someone holds a phone up to a mystery signal, a puzzle ringtone, a hidden track on an album — "what does this say?" For that, the companion tool listens instead of speaking: feed it an audio file or the live microphone, and it extracts tone timings, rebuilds the dots and dashes, and decodes the message, estimating the sending speed on the way.

Who needs an audio translator?

Learners turn any text into drill material at exactly the speed they're climbing toward — no curated practice files required, and a WAV export for the commute. Radio operators test how a callsign or exchange will sound before a contest, and use the decoder to check their own recorded fist. Makers and educators drop WAV exports into escape-room puzzles, museum exhibits, school projects on the telegraph, and film scores. Accessibility users explore communication by tone and vibration — the code was engineered to pass through any channel a human can sense, which is exactly what the light and vibrate options demonstrate.

And the round trip matters more than any single direction: generate audio here, decode it there, and you have verified the entire pipeline — encoding, timing, rendering, and detection — with your own message. Round-tripping is also how this site's tools are tested: a message that survives text → audio → text unchanged proves the timing engine is honest.

Frequently asked questions