Do you need to convert large text files into audio files? Here’s a helpful tech support video from Urban High School that walks you through converting digital text in to a MP3 file. You can then listen to this file on your computer or iOS device.
There’s also Text to Speech in the Safari Browser: Using a Mac computer. Open up Safari and you can highlight text and have your Mac read a web page text to you. Instructions
If you’re a Google Chrome user you’ll need to add Speakit! through the Google Chrome Store.
Technology @ Synergy School 
Text Speaker- Text to speech software is the simplest way to convert text. It opens and read Microsoft Word (DOC and DOCX), RTF, PDF, HTML, and TXT files. So you can easily convert text documents to MP3 or WAV files for listening anywhere.