SUS4 Mix Check

SUS4 Mix Check gives you tools to compare your mix against reference tracks and catch level mistakes before they make it to the master. Available on iPhone, iPad and Mac, you can load a reference and switch between your mix and the reference to compare loudness, tonal balance and overall feel.

The app is designed for the checking phase of mixing, not the mixing phase itself. Once you have a mix that sounds roughly right in your room, SUS4 Mix Check helps you verify it against work that has already been through the mastering chain and confirmed to translate well.

Reference comparison is a standard practice in professional mixing for a reason: your ears adapt to the room and the mix after extended listening sessions, and a reference reset breaks that adaptation. SUS4 Mix Check makes that reset quick and systematic.