CHECK

CHECK by KERN Audio is a stereo analysis utility that reveals exactly where your mix’s stereo image will collapse in mono. Instead of a single correlation number, it displays a real-time correlation curve across 40 ERB frequency bands, with colour-coded zones showing safe, cautionary and phase-cancelling areas. A bass-weighted score treats low frequencies as three times more critical, so you immediately know if your low end will survive a club system. The FOCUS knob zooms into low, full or high ranges, while MONO and SIDE buttons let you audition the damage and isolate the difference signal. A bar chart view spotlights individual problem bands, and smart messages name the frequency and suggest common causes—like an out-of-phase kick and bass. Ideal for electronic producers, mixing engineers and anyone checking club or broadcast compatibility, CHECK turns mono compatibility from guesswork into a visual, educational workflow.