A free program for Android, by Text Voice.
Text-to-speech (TTS) is a tool that can convert text into speech. This app can convert PDFs into audio.
Conversion process
This app can read out texts from PDF files.
In order to do that, you need to provide the file name and the contents of the file.
The output of the app depends on the settings, but you can expect to hear English, French, German, Spanish, and Russian.
The settings
There are many settings available, such as the rate of the voice, the volume, the pitch, etc.
Voice settings
There is an option to set the voice to a specific language.
Morse keyboard
In order to write in the files, there is an option to use a Morse keyboard.
Disabled person mode
This mode is for people who cannot speak or click the buttons.
