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JE3HHT - Makoto Mori

RTTY with Windows and Soundcard
WinXP - Vista - Win7

"MMTTY is free for Amateur Radio Use"

MMTTY Image   MMTTY Screen shot
Click for full screen view

New MMTTY Revision History Page
see menu

Webmasters: Please Do Not link to files from your website!


June 4, 2017

(Full Version - 3.5MB)

MMTTY V170K Engine

September 29, 2010

(Full Version - 2.8MB)

What's New in Ver. 1.68A

(No installer - for experienced users - 2.6MB)

Inno Installer Info

Updated ARRL.DX file -

Unzip ARRL.DX.ZIP and copy ARRL.DX into the program folder.

Problems using the .chm Help?
See the Contact and Support page


Older Versions of MMTTY

(Full Version - 2.99mb)

MMTTY165D split into 2 files

(Install from HD or Floppies)

(Full Version - 2.5mb)

MMTTY165B split into 3 files

(Install from HD or Floppies)

MMTTY 158NP - (979kb)
May work better on some older, non Pentium computers


Installing MMTTY

A fair amount of testing is done before a new release made available on the website. In my tests, I always installed over the older versions To date I have never had any problems. That being said, one never knows for sure how an install will go on every computer.. All  I can say is installing over the older version should work.. It might be a good idea to make a back up copy of MMTTY.ini and (urcall).mdt, just in case something goes wrong.

MMTTY Engine

(* Download only if you use another program that requires the Engine*)

MMTTY Engine Ver. 1.68a

Download from the Programmers Download Page

This is the file needed to add the RTTY mode to
commercial programs that use the MMTTY engine.

Older Versions of MMTTY Engine available:

Programmers Download Page


View Online - 18mb

download zip file - 18mb

RTTY audio files I recorded for MMTTY receive testing.
(In Wave and MMV formats)

Getting Started on RTTY

A tutorial on how to get started operating RTTY using MMTTY as the primary program to begin your RTTY operations.  Check this and other RTTY information out on the AA5AU RTTY page

For anyone new to RTTY and MMTTY, this tutorial should be considered as Mandatory Reading before asking questions. Please take the time to utilize this excellent resource!


(Dedicated to RTTY mode contesting)

Using MMTTY with FSK

COMFSK information and download


COMFSK allows keying your radio for for PTT/FSK

(1) parallel port 
(USB-Parallel converter not supported).
(2) serial port 
(3) USB serial adapter

(English September 6, 2002)
(Log and Summary Sheets generator for the JARTS RTTY contest)

JARTS Website:

For support, please use!

See the Contact and Support page