A computer-implemented method for monitoring activity at a location, provides receiving a first data signal and a second data signal, wherein the first and second data signals are related to activities detected at a location, and reproducing the first and second data signals in a chronology that indicates relative timing of receipt of the first and second data signals via a user interface. This may accelerate review and inspection of multiple data signals recorded over time, including data signals of various types. The coincidence of patterns in the data signals may be detected and brought to the user's attention for closer review, such as via transmission of a message or transmission of a segment of recorded data.