The rapid adoption of MPEG-DASH is testament
to its core design principles that enable the client to make the
informed decision relating to media encoding representations,
based on network conditions, device type and preferences. Typically,
the focus has mostly been on the different video quality
representations rather than audio. However, for device types with
small screens, the relative bandwidth budget difference allocated
to the two streams may not be that large. This is especially the
case if high quality audio is used, and in this scenario, we argue
that increased focus should be given to the bit rate representations
for audio. Arising from this, we have designed and implemented
a subjective experiment to evaluate and analyse the possible
effect of using different audio quality levels. In particular, we
investigate the possibility of providing reduced audio quality so
as to free up bandwidth for video under certain conditions. Thus,
the experiment was implemented for live music concert scenarios
transmitted over mobile networks, and we suggest that the results
will be of significant interest to DASH content creators when
considering bandwidth tradeoff between audio and video.