  Understanding the physical properties of stars, and putting these properties
into the context of stellar evolution, is a core challenge in astronomical
research. A key visualization in studying stellar evolution is the
Hertzsprung-Russell diagram (HRD), organizing data about stellar luminosity and
colour into a form that is informative about stellar structure and evolution.
However, connecting the HRD with other sources of information, including
stellar time series, is an outstanding challenge. Here we present a new method
to turn stellar time series into sound. This method encodes physically
meaningful features such that auditory comparisons between sonifications of
different stars preserve astrophysical differences between them. We present an
interactive multimedia version of the HRD that combines both visual and
auditory components and that allows exploration of different types of stars
both on and off the main sequence through both visual and auditory media.
