Automated digital recording systems are important for studying and monitoring wildlife. Here we describe a new recording system, easily programmable and highly flexible, designed to control the Marantz Professional Solid State Recorder PMD 660. The system is currently being used to monitor the effects of global warming on populations of several species of amphibians in Spain and Portugal, to describe the acoustic landscape and bird populations in western Kentucky, and to study behavioral calls of midwife toads in central and northern Spain.