fix(voice): ncco encoding

[manchuck]

Description

Motivation and Context

Testing Details

Example Output or Screenshots (if appropriate)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[codecov-commenter]

Codecov Report

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

Comparison is base (05cbf33) 83.38% compared to head (b6acd55) 83.41%.

:exclamation: Current head b6acd55 differs from pull request most recent head f2bdb27. Consider uploading reports for the commit f2bdb27 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 3.x #906 +/- ## ========================================== + Coverage 83.38% 83.41% +0.03% ========================================== Files 121 121 Lines 1637 1640 +3 Branches 323 324 +1 ========================================== + Hits 1365 1368 +3 Misses 272 272 ```

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