Excited state dynamics of neutral and anionic forms of 2-((2- hydroxybenzylidene)amino)phenol (HBAP). a Schiff base. has been elucidated using time resolved fluorescence spectroscopy. The neutral molecule exhibits keto-enol tautomerism. https://www.roneverhart.com/RME-Fireface-UFX-III-Audio-Interface-p32300/