Fix for audio stack overflow

[craigthomas]

This PR fixes a problem with the stack buffer. In certain circumstances, the resampled buffer could overflow the static buffer allotted. The stack buffer was expanded and changed from generic int type to Uint8.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.04%. Comparing base (9f3e25d) to head (90e6554).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #57   +/-   ##
=======================================
  Coverage   90.04%   90.04%           
=======================================
  Files           9        9           
  Lines        2733     2733           
  Branches      252      252           
=======================================
  Hits         2461     2461           
  Misses        267      267           
  Partials        5        5           

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