  This paper introduces a new database of voice recordings with the goal of
supporting research on vulnerabilities and protection of voice-controlled
systems (VCSs). In contrast to prior efforts, the proposed database contains
both genuine voice commands and replayed recordings of such commands, collected
in realistic VCSs usage scenarios and using modern voice assistant development
kits. Specifically, the database contains recordings from four systems (each
with a different microphone array) in a variety of environmental conditions
with different forms of background noise and relative positions between speaker
and device. To the best of our knowledge, this is the first publicly available
database that has been specifically designed for the protection of
state-of-the-art voice-controlled systems against various replay attacks in
various conditions and environments.
