From b6053729a43c062dd61bc04f5f5bdacb781377bd Mon Sep 17 00:00:00 2001
From: Stan Grams <sjg@haxx.space>
Date: Sat, 28 Feb 2026 22:07:34 +0100
Subject: [PATCH] [fix](trx-backend-soapysdr): emit proper stereo pcm frames

Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
---
 .../trx-backend/trx-backend-soapysdr/src/dsp.rs       | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs b/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
index 4910e83..f292fd9 100644
--- a/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
+++ b/src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs
@@ -674,7 +674,16 @@ impl ChannelDsp {
                 }
                 *s = self.audio_agc.process(*s);
             }
-            raw
+            if self.output_channels >= 2 {
+                let mut stereo = Vec::with_capacity(raw.len() * self.output_channels);
+                for sample in raw {
+                    stereo.push(sample);
+                    stereo.push(sample);
+                }
+                stereo
+            } else {
+                raw
+            }
         };
 
         // --- 5. Emit complete PCM frames ------------------------------------