Wayne Brady was the target of a racist, expletive-laced voicemail left at the studio where he films his game show … and it’s disgusting.

The audio of the message left at CBS Studios in L.A.’s Fairfax District where the affable comedian and singer hosts “Let’s Make a Deal.” The voicemail’s as deplorable as it sounds … with the caller dropping a couple of “fing n**” bombs.

The audio lasts only 9 seconds but the caller spews plenty of racism and hate. It’s unclear exactly what he’s ranting about … but it’s clear he’s no fan of Wayne’s.

Sources with direct knowledge tell the message was left on the studio’s voicemail system. We’re told CBS security filed a report and immediately notified the LAPD.

Law enforcement sources tell TMZ … the LAPD looked into it but, in the end, we’re told cops determined the VM didn’t rise to the level of a crime.

In any event … sad to think someone feels this way about one of the nicest guys in Hollywood. #SMH