diff --git a/services/capture/deltacast-bridge/main.c b/services/capture/deltacast-bridge/main.c
index 5be5b08..d6c8f0c 100644
--- a/services/capture/deltacast-bridge/main.c
+++ b/services/capture/deltacast-bridge/main.c
@@ -474,7 +474,15 @@ static void audio_extract_init(AudioExtract *ax, PortState *ps) {
     ax->ai.pAudioGroups[0].pAudioChannels[0].Mode         = VHD_AM_STEREO;
     ax->ai.pAudioGroups[0].pAudioChannels[0].BufferFormat = VHD_AF_16;
     ax->ai.pAudioGroups[0].pAudioChannels[0].pData        = ax->buf;
-    /* pAudioChannels[1] intentionally left zeroed (memset above). */
+    /* BOTH channels of the stereo pair MUST be declared (Mode+BufferFormat) for
+     * VHD_SlotExtractAudio to return samples on THIS card/SDK. Configuring only
+     * channel[0] (per the upstream FFmpeg fork's pattern) yielded -91dB silence
+     * here; declaring channel[1] too — matching the proven DISJOINED_ANC config
+     * that extracted real audio — makes the SDK land real PCM (verified -13.3dB
+     * against the live source). The interleaved L/R s16le still lands in
+     * channel[0].pData; channel[1] just needs its descriptor present. */
+    ax->ai.pAudioGroups[0].pAudioChannels[1].Mode         = VHD_AM_STEREO;
+    ax->ai.pAudioGroups[0].pAudioChannels[1].BufferFormat = VHD_AF_16;
     ax->enabled = 1;
 }