Before & After Techno Mastering Examples. Below are some examples of our house music mastering service. Each has a before and after sample, so you can hear the difference mastering your music can make. On this page, there are examples for House, Deep House & Tech House (click to jump to). Get A Quote Want to know more? Contact Us Ready to take your sound to the next level? Reach out for a consultation and let’s make audio magic together!