No specific info about version 3.1. Please visit the main page of Audio Toolbox on Mac Informer.
This app helps you convert videos and songs to multiple audio formats.
An application that helps you split audio files.
Emicsoft Audio Converter for Mac is a tool that helps you convert audio files.
4Media Audio Converter Pro is a very complete audio conversion tool.
DX Toolbox searches the Web for you, gathering information on solar and geomagnetic conditions that affect radio propagation.