diff --git a/livekit-ffi/protocol/audio_frame.proto b/livekit-ffi/protocol/audio_frame.proto
index 41d1197..ab1f581 100644
--- a/livekit-ffi/protocol/audio_frame.proto
+++ b/livekit-ffi/protocol/audio_frame.proto
@@ -51,7 +51,7 @@ message RemixAndResampleRequest {
 }
 
 message RemixAndResampleResponse {
-  FFIHandleId buffer_handle = 1;
+  AudioFrameBufferInfo buffer = 1;
 }
 
 ///
diff --git a/livekit-ffi/src/server/mod.rs b/livekit-ffi/src/server/mod.rs
index d792fed..4a108c5 100644
--- a/livekit-ffi/src/server/mod.rs
+++ b/livekit-ffi/src/server/mod.rs
@@ -679,10 +679,11 @@ impl FfiServer {
         };
 
         let handle_id = self.next_id() as FfiHandleId;
+        let buffer_info = proto::AudioFrameBufferInfo::from(handle_id, &frame);
         self.ffi_handles.insert(handle_id, Box::new(frame));
 
         Ok(proto::RemixAndResampleResponse {
-            buffer_handle: Some(handle_id.into()),
+            buffer: Some(buffer_info),
         })
     }