feat: support custom audio files

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.37%. Comparing base (e86f848) to head (84b1385).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #154 +/- ## ========================================== + Coverage 97.34% 97.37% +0.02% ========================================== Files 10 10 Lines 640 647 +7 Branches 91 93 +2 ========================================== + Hits 623 630 +7 Misses 10 10 Partials 7 7 ```

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