diff --git a/services/oboeservice/AAudioServiceEndpointShared.cpp b/services/oboeservice/AAudioServiceEndpointShared.cpp
index 63b9983..a7cd128 100644
--- a/services/oboeservice/AAudioServiceEndpointShared.cpp
+++ b/services/oboeservice/AAudioServiceEndpointShared.cpp
@@ -78,6 +78,7 @@
     setSamplesPerFrame(mStreamInternal->getSamplesPerFrame());
     setDeviceId(mStreamInternal->getDeviceId());
     setSessionId(mStreamInternal->getSessionId());
+    setFormat(AUDIO_FORMAT_PCM_FLOAT); // force for mixer
     mFramesPerBurst = mStreamInternal->getFramesPerBurst();
 
     return result;