Fix audio clock drift and adaptive jitter buffering

docs/api-dotnet.md

@@ -177,8 +177,10 @@ Noise reduction does not gate speech.
 `TimeProvider` timestamps; tests inject a clock. Threshold changes are atomic; all
 processing state otherwise has one owner. Codec/DSP processing methods allocate no
 managed memory after initialization, verified across 1,000 combined cycles. They run
-on a managed worker, never the native real-time device callback. Native device rings,
-jitter, mixer, and audio scheduling remain later work.
+on a managed worker, never the native real-time device callback. Managed capture/playback
+rings compensate independent clock drift around a configurable 20/40/60 ms target. Receive
+jitter is duration-aware, reserves one codec frame for DRED/FEC look-ahead, and decodes each
+channel packet at its actual duration before the fixed 20 ms mixer stage.
 
 ## Initial managed server