Morse Code Audio Generator

A Node.js package to:

• Convert Text → Morse Code
• Convert Morse Code → Text
• Generate Morse code audio (.wav) from text using sine wave synthesis

Features

• Encode plain text into Morse code
• Decode Morse code back into text
• Generate Morse code audio as .wav
• Pure JavaScript implementation
• No external audio processing tools required

Installation

npm install morse-code-audio-generator

Note : Requires Node.js 14 or above.

Usage

Import the package:

const morse = require("morse-code-audio-generator");

Encode Text to Morse

console.log(morse.encode("SOS"));

Output:

... --- ...

Decode Morse to Text

console.log(morse.decode("... --- ..."));

Output:

SOS

Generate Audio

morse.texttoAudio("HELLO", "hello.wav");

This creates:

hello.wav

The generated file contains Morse code beeps.

Supported Characters

Alphabets

• A-Z

Numbers

• 0-9

Symbols

• .
• ,
• ?
• !
• Space ( )

Morse Timing Rules

• Dot (.) → 100 ms beep
• Dash (-) → 300 ms beep
• Symbol gap → 50 ms silence
• Letter gap → 150 ms silence
• Word gap → 500 ms silence

How Audio Generation Works

This package generates sound mathematically using a sine wave:

Math.sin(2 * Math.PI * frequency * time)

Audio synthesis steps:

1. Convert text into Morse code
2. Convert dots/dashes into tones
3. Generate raw PCM samples
4. Save samples into a WAV file

Example

Input:

HELLO WORLD

Encoded Morse:

.... . .-.. .-.. --- / .-- --- .-. .-.. -..

Generated output:

hello.wav

API

encode(text)

Returns Morse code string.

Example:

morse.encode("HELLO")

decode(morse)

Returns decoded text.

Example:

morse.decode(".... . .-.. .-.. ---")

texttoAudio(text, filename)

Generates .wav audio file.

Example:

morse.texttoAudio("SOS", "sos.wav")

Author

Yash Kumar

License

ISC