This record represents humpback whale sound production detected from raw passive acoustic data. The Low Frequency Detection and Classification System (LFDCS) call library for humpback whales contains 9 call types with exemplars taken from song notes spanning 2006-2017 (except 2007). All humpback whale detections with a MD of 3.0 or less were manually screened for the daily presence of true humpback whale vocalizations. A day was then marked as present for humpback whales if one true detection was found within at least three humpback whale vocalizations, occurring over a 10 min window. The 10 min window was deemed sufficient to clearly distinguish putative humpback whale vocalizations from those of other species.These data were recorded at SanctSound Site SB01_02 between January 28, 2019 and April 02, 2019.