You can change the settings that Docuscan Plus uses to save braille, MP3, and DAISY files from your scanned material. In order to change them, select the "Preferences" button from the main Docuscan Plus start screen.
When you activate the "Preferences" button with spacebar or VO+spacebar, the preferences window will open, displaying the preferences dialog. You can adjust braille and speech preferences by pressing VO+spacebar on the appropriate tab. Be aware that, as with other Mac applications, preferences take effect immediately and do not need to be confirmed. Therefore, when you have your preferences set the way you want them, simply close the preferences window with command+w.
To adjust the voice and speaking rate used to make MP3 recordings or DAISY files, navigate to the "Speech" tab and select it with VO+spacebar. You can then tab through the available options and adjust them to your liking.
First, select the voice you want to use from the popup menu. Activate the menu by tabbing to it or using the VO navigation keys. If the selected voice is not the one you want, press the down arrow to open the list, find the voice you want, and confirm with VO+spacebar.
Use the "Faster" and "slower" buttons to adjust the speech rate to a comfortable speed. It is important to remember to just press these buttons with the spacebar. If you use VO+spacebar, you will not hear the sample text used to judge the speaking rate, because Voiceover will interrupt with its announcement that you've pressed the button.
Docuscan Plus will save to a braille file using the braille table selected in the "Braille" preferences tab. To select a braille table appropriate to your needs, select the "Braille" tab by navigating to it and pressing VO+spacebar. Then, select the braille table from the list by navigating to the list, then finding the correct table using the up and down arrows. Confirm your selection with VO+spacebar.