Log Message:
audio/fasttracker2: Updates to v1.27

Changes since v1.26

v1.27 - 24.07.2020
- Fixed a small stuttering issue in the audio/video syncing
- Bugfix: When rendering a song to a 16-bit WAV while having audio output
  set to 32-bit, you'd never get dithering in the WAV render.
- Further optimization of the audio channel mixer (~5-16% perf. increase)