see where your stereo falls apart.

in action

see what your mix looks like in mono.

CHECK analyzing a stereo mix. the correlation curve shows safe frequencies in mint and problem areas dropping into the red zone. the bass-weighted score reads 55% — REVIEW MIX.

1 correlation curve real-time mono compatibility across 40 ERB frequency bands. green line shows current correlation, gray line shows peak hold. above 0.6 is safe. below 0 means phase cancellation. 2 zone backgrounds color-coded zones make it instant to read. green = MONO SAFE. amber = CAUTION. red = PHASE CANCEL. no numbers needed — just look at the color. 3 mono score bass-weighted compatibility score. frequencies below 200 Hz count 3x more because that's where mono collapse actually hurts — club systems, phone speakers, Bluetooth. 4 SPEED controls how fast the display responds. lower values show instant changes. higher values smooth out the curve to reveal the average over time. 5 FOCUS zoom into LOW, FULL, or HIGH frequency ranges. isolate your bass to check sub mono compatibility, or focus on the stereo highs. 6 BASS controls how much the score emphasizes low frequencies. at 100%, sub-bass problems dominate the score. at 0%, all frequencies count equally. 7 ZOOM sets the vertical scale of the display. use the full -1 to +1 range, or zoom into 0 to +1 for a closer look at positive correlation. 8 MONO / SIDE MONO collapses your output to mono so you hear the damage. SIDE solos the difference signal — everything that disappears in mono, isolated.

hover the numbered dots to explore the interface

features

what makes CHECK different.

specifications

the numbers.

complete your toolkit

CHECK finds the problems. these fix them.

CHECK shows you where your mix has phase issues. the rest of the KERN series gives you the tools to fix them — without destroying what makes your mix yours.