The PHP code defining the Morse code encoding table is as follows: In this project, saving memory was not a real issue, so a simple encoding scheme was devised using an associative array of strings representing each dit with a '0' and each dah with a '1'. In this implementation, all characters and symbols not defined are ignored. In addition, it is important to note that Morse code does not differentiate between upper and lower case letters, and also lacks encoding for special symbols and some characters. Unfortunately, Morse code uses a variable length encoding scheme, so it's also necessary to use a variable length sequence or find a way to pack the data into a fixed bit-size commonly used in computer memory. An obvious choice would be to represent a dit as a 0 bit and a dah as a 1 bit, or vice-versa.
AUDIO MORSE CODE TRANSLATOR HOW TO
In Morse code, characters (letter, numbers, punctuation, and special symbols) are encoded as a sequence of dits and dahs, so to convert text to Morse code, we first need to determine how to represent the symbols. In modern digital communications parlance, Morse code would be described as a form of amplitude shift keying (ASK). Essentially, Morse code is generated by turning on and off an audio (or RF) source and forming short and long pulses of sound, referred to colloquially as dots and dashes, or in radio communications jargon as dits and dahs. Morse code is a text encoding method that has the advantage of being easy to encode and can be decoded using the human ear. This article will describe the parameters that define Morse code, explain how a WAVE formatted sound file is generated, and present the PHP code to implement the Morse code translation and generate the WAVE file. Unfortunately, those descriptions don't help very much if we're trying to write computer code to generate Morse code. Morse code is familiar to many people simply as a sequence of dot and dash characters or a bunch of beeps that appear in a few old movies. If you want to test the PHP code, the web page and the associated PHP file will need to be copied onto a PHP-enabled web server. The zip-file contains the web page to submit the text and the PHP source code file that actually generates and presents the audio file. The above screenshot shows a web page that starts the Morse code generation. The result, CodeGen, is presented here.įor my purposes, I needed to access the Morse code audio over the web, so I decided to use PHP as the main programming language.
AUDIO MORSE CODE TRANSLATOR GENERATOR
After a few quick searches, I wasn't able to find anything that suited my needs, so I decided to write a generator myself.
I recently needed to be able to generate a Morse code audio file based on input text.
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