diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 1b80f0f700e6..c8a5cd5eedf3 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -392,25 +392,41 @@ int cx88_video_mux(struct cx88_core *core, unsigned int input)
 		break;
 	}
 
-	if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
-		/* sets sound input from external adc */
-		if (INPUT(input).audioroute) {
-			/* The wm8775 module has the "2" route hardwired into
-			   the initialization. Some boards may use different
-			   routes for different inputs. HVR-1300 surely does */
-			if (core->board.audio_chip &&
-			    core->board.audio_chip == AUDIO_CHIP_WM8775) {
-				struct v4l2_routing route;
+	/* if there are audioroutes defined, we have an external
+	   ADC to deal with audio */
 
-				route.input = INPUT(input).audioroute;
-				cx88_call_i2c_clients(core,
-					VIDIOC_INT_S_AUDIO_ROUTING,&route);
-			}
+	if (INPUT(input).audioroute) {
 
+		/* cx2388's C-ADC is connected to the tuner only.
+		   When used with S-Video, that ADC is busy dealing with
+		   chroma, so an external must be used for baseband audio */
+
+		if (INPUT(input).type != CX88_VMUX_TELEVISION &&
+			INPUT(input).type != CX88_RADIO) {
+			/* "ADC mode" */
+			cx_write(AUD_I2SCNTL, 0x1);
 			cx_set(AUD_CTL, EN_I2SIN_ENABLE);
-		} else
+		} else {
+			/* Normal mode */
+			cx_write(AUD_I2SCNTL, 0x0);
 			cx_clear(AUD_CTL, EN_I2SIN_ENABLE);
+		}
+
+		/* The wm8775 module has the "2" route hardwired into
+		   the initialization. Some boards may use different
+		   routes for different inputs. HVR-1300 surely does */
+		if (core->board.audio_chip &&
+		    core->board.audio_chip == AUDIO_CHIP_WM8775) {
+			struct v4l2_routing route;
+
+			route.input = INPUT(input).audioroute;
+			cx88_call_i2c_clients(core,
+				VIDIOC_INT_S_AUDIO_ROUTING,&route);
+
+		}
+
 	}
+
 	return 0;
 }
 EXPORT_SYMBOL(cx88_video_mux);