diff --git a/include/sound/ak4xxx-adda.h b/include/sound/ak4xxx-adda.h
index aa49dda4f4104b4a58032516e72f690b94191627..fd0a6c46f497e69946137621a4f5ae7cf049125c 100644
--- a/include/sound/ak4xxx-adda.h
+++ b/include/sound/ak4xxx-adda.h
@@ -43,6 +43,7 @@ struct snd_ak4xxx_ops {
 struct snd_akm4xxx_dac_channel {
 	char *name;		/* mixer volume name */
 	unsigned int num_channels;
+	char *switch_name;		/* mixer switch*/
 };
 
 /* ADC labels and channels */
diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
index 8805110017a7ece661d519a2e19d737089245849..fd335159f8499ee9f5b50ed7fb8ccee9fc9fd7b0 100644
--- a/sound/i2c/other/ak4xxx-adda.c
+++ b/sound/i2c/other/ak4xxx-adda.c
@@ -481,8 +481,8 @@ static int ak4xxx_switch_get(struct snd_kcontrol *kcontrol,
 	int addr = AK_GET_ADDR(kcontrol->private_value);
 	int shift = AK_GET_SHIFT(kcontrol->private_value);
 	int invert = AK_GET_INVERT(kcontrol->private_value);
-	unsigned char val = snd_akm4xxx_get(ak, chip, addr);
-
+	/* we observe the (1<<shift) bit only */
+	unsigned char val = snd_akm4xxx_get(ak, chip, addr) & (1<<shift);
 	if (invert)
 		val = ! val;
 	ucontrol->value.integer.value[0] = (val & (1<<shift)) != 0;
@@ -585,6 +585,26 @@ static int build_dac_controls(struct snd_akm4xxx *ak)
 
 	mixer_ch = 0;
 	for (idx = 0; idx < ak->num_dacs; ) {
+		/* mute control for Revolution 7.1 - AK4381 */
+		if (ak->type == SND_AK4381 
+				&&  ak->dac_info[mixer_ch].switch_name) {
+			memset(&knew, 0, sizeof(knew));
+			knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+			knew.count = 1;
+			knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
+			knew.name = ak->dac_info[mixer_ch].switch_name;
+			knew.info = ak4xxx_switch_info;
+			knew.get = ak4xxx_switch_get;
+			knew.put = ak4xxx_switch_put;
+			knew.access = 0;
+			/* register 1, bit 0 (SMUTE): 0 = normal operation,
+			   1 = mute */
+			knew.private_value =
+				AK_COMPOSE(idx/2, 1, 0, 0) | AK_INVERT;
+			err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
+			if (err < 0)
+				return err;
+		}
 		memset(&knew, 0, sizeof(knew));
 		if (! ak->dac_info || ! ak->dac_info[mixer_ch].name) {
 			knew.name = "DAC Volume";
diff --git a/sound/pci/ice1712/revo.c b/sound/pci/ice1712/revo.c
index 690ceb34064444575578a982a04e1b51d428f9ed..d18a31e188a9a594ccbe8b0ed22a487bec783703 100644
--- a/sound/pci/ice1712/revo.c
+++ b/sound/pci/ice1712/revo.c
@@ -186,7 +186,12 @@ static int revo51_i2c_init(struct snd_ice1712 *ice,
 #define AK_DAC(xname,xch) { .name = xname, .num_channels = xch }
 
 static const struct snd_akm4xxx_dac_channel revo71_front[] = {
-	AK_DAC("PCM Playback Volume", 2)
+	{
+		.name = "PCM Playback Volume",
+		.num_channels = 2,
+		/* front channels DAC supports muting */
+		.switch_name = "PCM Playback Switch",
+	},
 };
 
 static const struct snd_akm4xxx_dac_channel revo71_surround[] = {