Daniel Wyatt from Mix:Master Wyatt Academy, takes a look at the Codec Toolbox for checking your mixes sound as good as they can when encoded to mp3. You can then encode in real-time with the plug-in, or use the included 'Codec Manager' software to encode offline.
If you want to know more about preparing files for streaming services then MixMasterWyatt Academy and Sonnox have got together to offer a free webinar on getting your music ready for streaming. Daniel Wyatt from MixMasterWyatt Academy and Josep M. Sola from Sonnox are running this free webinar on two different days, either on October 18th at 2pm EST or October 19th at 2pm EST.