diff --git a/services/capture/deltacast-bridge/main.c b/services/capture/deltacast-bridge/main.c
index 8a7a387..8bf1477 100644
--- a/services/capture/deltacast-bridge/main.c
+++ b/services/capture/deltacast-bridge/main.c
@@ -179,13 +179,25 @@ static void *audio_thread(void *arg) {
                                    VHD_SDI_STPROC_DISJOINED_ANC,
                                    NULL, &stream, NULL);
     if (r == VHDERR_NOERROR) {
+        /* Per Deltacast SDK Sample_RXAudio.cpp: VHD_SDI_SP_INTERFACE must be
+         * propagated to the audio stream, otherwise VHD_SlotExtractAudio
+         * returns 0 samples (silent capture). */
+        ULONG iface = 0;
+        VHD_GetStreamProperty(stream, VHD_SDI_SP_INTERFACE, &iface);
+
         VHD_SetStreamProperty(stream, VHD_SDI_SP_VIDEO_STANDARD,    ps->video_std);
         VHD_SetStreamProperty(stream, VHD_SDI_SP_CLOCK_SYSTEM,      ps->clock_div);
         VHD_SetStreamProperty(stream, VHD_CORE_SP_TRANSFER_SCHEME,  VHD_TRANSFER_SLAVED);
+        VHD_SetStreamProperty(stream, VHD_SDI_SP_INTERFACE,         iface);
 
+        /* Configure BOTH channels of the stereo pair (group 0). The actual PCM
+         * samples land in pAudioChannels[0].pData (packed L/R s16le). Channel
+         * [1] must declare Mode+BufferFormat so the SDK recognizes the pair. */
         ai.pAudioGroups[0].pAudioChannels[0].Mode         = VHD_AM_STEREO;
         ai.pAudioGroups[0].pAudioChannels[0].BufferFormat = VHD_AF_16;
         ai.pAudioGroups[0].pAudioChannels[0].pData        = buf;
+        ai.pAudioGroups[0].pAudioChannels[1].Mode         = VHD_AM_STEREO;
+        ai.pAudioGroups[0].pAudioChannels[1].BufferFormat = VHD_AF_16;
 
         if (VHD_StartStream(stream) == VHDERR_NOERROR) {
             have_vhd_audio = 1;