TrueTTY Accessibility for
Blind and Vision-Impaired Hams


   This article is for blind and vision-impaired amateur radio operators who want to use the TrueTTY HF digital modem. The program has the following accessibility features:

          • Third-party screen readers can access the received text.
          • Keyboard shortcuts.
          • Menu items accessible with standard Windows commands.
          • QSO data fields and macros accessible via the keyboard.
          • High visibility text options.


   TrueTTY, developed by UA9OSV, works with a number of the most popular HF digital modes. There is a free version and a registered version that saves configuration settings.

Text To Speech

   The CTRL-N keyboard shortcut copies received text to a NotePad window, where it can be converted to speech by a screen reader. The details, including an example of a QSO, are described in a separate article.

Keyboard Shortcuts

   The TrueTTY Program Overview describes all of the built-in keyboard shortcuts. It is not necessary to use a mouse or see the computer screen to operate TrueTTY.

   Each macro also has a keyboard shortcut. For example, pressing the F1 key sends a CQ message.

QSO Data Boxes

   TrueTTY has QSO Data boxes for entering the call sign of the other station, a signal report, your contact's name, and other information. These entries are available for use in macros.

   For example, the ALT-C keyboard shortcut moves the cursor to the Call Sign data field, where a screen reader such as JAWS automatically reads the contents and where you can type a new call sign. Pressing Tab cycles the cursor through the QSO Data boxes and then to the Transmit Text box. Pressing ALT-A clears all the QSO Data fields.

High Visibility Text

   The Fonts and Colors Tab of the Setup Menu has a wide range of fonts, styles, sizes, font colors, and background colors. A preview box shows the result of each selection.

   Some examples of TrueTTY with high visibility text are shown in a separate article.

For More Information

TrueTTY Text-to-Speech
Configuring TrueTTY Vision Features
PSK31 Operating Notes from a Blind Ham


   TrueTTY is accessible to blind and vision-impaired hams. Received text can be converted to speech by a screen reader. You can use keyboard shortcuts to operate TrueTTY without a mouse or computer screen. It also has high visibility font and color options.


Author Information

   Peter DeNeef is an Extra Class amateur radio operator in the U.S. This Web site has no ads or conflicts of interest.
Email:  HamRadioAndVision "at" gmail "dot" com.

rev. 5/10/2012

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