Bef before his diagnosis, dci mark lapslie thought everyone was like him. Now he knows he suffers from synaethesthesia - a rare neurological condition that has cross-wired his senses. The sickening clamour of sounds he c...Bef before his diagnosis, dci mark lapslie thought everyone was like him. Now he knows he suffers from synaethesthesia - a rare neurological condition that has cross-wired his senses. The sickening clamour of sounds he can taste has smothered his marriage and stifled his career.