Is there an audio renderer?
"Sound renderers" do exist, and some are very good: have a look at the research of Nikunj Raghuvanshi. For an introduction to their rendering method:

Nikunj Raghuvanshi, Rahul Narain and Ming C. Lin, Efficient and Accurate Sound Propagation Using Adaptive Rectangular Decomposition, IEEE Transactions on Visualization and Computer Graphics(TVCG), 15(5), 2009.

Abstract:


  Accurate sound rendering can add significant realism to complement
  visual display in interactive applications, as well as facilitate
  acoustic predictions for many engineering applications, like accurate
  acoustic analysis for architectural design. Numerical simulation
  can provide this realism most naturally by modeling the underlying
  physics of wave propagation. However, wave simulation has
  traditionally posed a tough computational challenge. In this paper, we
  present a technique which relies on an adaptive rectangular
  decomposition of 3D scenes to enable efficient and accurate simulation
  of sound propagation in complex virtual environments. It exploits the
  known analytical solution of the Wave Equation in rectangular domains,
  and utilizes efficient implementation of Discrete Cosine Transform on
  the GPU to achieve at least a hundred-fold performance gain compared
  to a standard Finite Difference Time Domain (FDTD) implementation with
  comparable accuracy, while also being an order of magnitude more
  memory-efficient. Consequently, we are able to perform accurate
  numerical acoustic simulation on large, complex scenes in the
  kilohertz range. To the best of our knowledge, it was not previously
  possible to perform such simulations on a desktop computer. Our work
  thus enables acoustic analysis on large scenes and auditory display
  for complex virtual environments on commodity hardware.


The paper has its own website. The manuscript version of the paper there is missing some prose, so preferably get the paper from the first link.

Siemens, for example, advertises acoustics simulation as part of their computer aided engineering solutions.