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Morse Code

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4.1 | 7 ratings Rate this file 22 Downloads (last 30 days) File Size: 14.1 KB File ID: #7791

Morse Code

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05 Jun 2005 (Updated )

This converts text to playable morse code in wav format.

Editor's Notes:

This file was selected as MATLAB Central Pick of the Week

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File Information
Description

MORSE converts text to playable morse code in wav format.

SYNTAX
morse(text)
morse(text,file);

Description:

If the wave file name is specified, then the funtion will output a wav file with that file name. If only text is specified, then the function will only play the morse code wav file without saving it to a wav file.

Examples:

  morse('Hello');
  morse('How are you doing my friend?','morsecode.wav');

Acknowledgements

This file inspired Demorse.

MATLAB release MATLAB 7 (R14)
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Comments and Ratings (12)
24 Feb 2012 Sandeep Kaur

can anyone tell me how to convert speech to text?

29 May 2009 Esben

Nice little useful program for training your morse skills:)

I updated the code a little, if anyone is interested... (feel free to add it to the original):

To have smaller spaces between letters, change line 33 from lsp = wav(6176:23022); to lsp = wav(6176:16022);

To add danish letters æ,ø,å (can be done for any additional signs, and I probably will later), add
AE = [Dit;ssp;Dah;ssp;Dit;ssp;Dah]; % danish Æ .-.-
OE = [Dah;ssp;Dah;ssp;Dah;ssp;Dit]; % danish Ø ---.
AA = [Dit;ssp;Dah;ssp;Dah;ssp;Dit;ssp;Dah]; % danish Å .--.-
and change
vars ={'period','comma','question','slash_'}; to
vars ={'period','comma','question','slash_','AE','OE','AA'};
and change
elseif ismember(text(i),'.,?/')
x = findstr(text(i),'.,?/');
to
elseif ismember(text(i),'.,?/ÆØÅ')
x = findstr(text(i),'.,?/ÆØÅ');

to modify the speed, a resampling is added in the last part (just after the loop):
morsecode=resample(morsecode,Fs,15000); % resample to Fs/15000
if the numberused is higher than Fs, the speed will be higher, if it is lower, the speed will be lower...

11 Mar 2008 Chirag Bhatt

Hi , While running this program , I found the following error,
*************************************
??? Index exceeds matrix dimensions.

Error in ==> morse at 23
text = varargin{1};
*****************************************
My version is 7.2(R2006a)
What I have to do?

08 Mar 2008 Chris Knox  
11 Aug 2007 Elvin Hai

It's a great program! May I know how the data in the wav.mat was obtained?

30 Mar 2006 Craig Miller K3OOL

Nice program. Brute force method of generating Morse code but it works very well.

24 Jan 2006 senthil raj

hou to convert text into speech more efficiently

16 Oct 2005 J Cea

To convert morse audio into text, do a search for "cw get"

25 Sep 2005 mani khan

how to convert wave file to .mat extension

19 Aug 2005 Osamah Rawashdeh

Awesome, usefull for creating ringtones for my cellphone ... ( SMS, MMS, CQ CQ CQ , etc)

17 Aug 2005 Carlo Cauyan

is there a code that does the opposite of this? convert a morse code audio into a alphanumeric message...a reply is greatly appreciated

18 Jul 2005 joe schmoe

Pretty neat, though it has little use now-a-days

Updates
08 Jun 2005

Added more description to the help section.

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