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 # Ryujinx Changelog
 All updates to the Ryujinx official master build will be documented in this file
 
+## 1.1.558 - 2023-01-15
+### Fixed:
+- Audren: Implement polyphase upsampler.
+  - Improves accuracy of the upsampler implementation. No known changes in games.
+
 ## 1.1.557 - 2023-01-14
 ### Fixed:
 - Ava UI: Fixes "Hide Cursor on Idle" for Windows.