diff --git a/sound/pci/mixart/mixart_mixer.c b/sound/pci/mixart/mixart_mixer.c
index 0e16512..5b3c224 100644
--- a/sound/pci/mixart/mixart_mixer.c
+++ b/sound/pci/mixart/mixart_mixer.c
@@ -376,15 +376,27 @@
 
 	mutex_lock(&chip->mgr->mixer_mutex);
 	is_capture = (kcontrol->private_value != 0);
-	for(i=0; i<2; i++) {
-		int  new_volume = ucontrol->value.integer.value[i];
-		int* stored_volume = is_capture ? &chip->analog_capture_volume[i] : &chip->analog_playback_volume[i];
-		if(*stored_volume != new_volume) {
+	for (i = 0; i < 2; i++) {
+		int new_volume = ucontrol->value.integer.value[i];
+		int *stored_volume = is_capture ?
+			&chip->analog_capture_volume[i] :
+			&chip->analog_playback_volume[i];
+		if (is_capture) {
+			if (new_volume < MIXART_ANALOG_CAPTURE_LEVEL_MIN ||
+			    new_volume > MIXART_ANALOG_CAPTURE_LEVEL_MAX)
+				continue;
+		} else {
+			if (new_volume < MIXART_ANALOG_PLAYBACK_LEVEL_MIN ||
+			    new_volume > MIXART_ANALOG_PLAYBACK_LEVEL_MAX)
+				continue;
+		}
+		if (*stored_volume != new_volume) {
 			*stored_volume = new_volume;
 			changed = 1;
 		}
 	}
-	if(changed)	mixart_update_analog_audio_level(chip, is_capture);
+	if (changed)
+		mixart_update_analog_audio_level(chip, is_capture);
 	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
@@ -421,13 +433,16 @@
 	struct snd_mixart *chip = snd_kcontrol_chip(kcontrol);
 	int i, changed = 0;
 	mutex_lock(&chip->mgr->mixer_mutex);
-	for(i=0; i<2; i++) {
-		if(chip->analog_playback_active[i] != ucontrol->value.integer.value[i]) {
-			chip->analog_playback_active[i] = ucontrol->value.integer.value[i];
+	for (i = 0; i < 2; i++) {
+		if (chip->analog_playback_active[i] !=
+		    ucontrol->value.integer.value[i]) {
+			chip->analog_playback_active[i] =
+				!!ucontrol->value.integer.value[i];
 			changed = 1;
 		}
 	}
-	if(changed)	mixart_update_analog_audio_level(chip, 0); /* update playback levels */
+	if (changed) /* update playback levels */
+		mixart_update_analog_audio_level(chip, 0);
 	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
@@ -843,23 +858,33 @@
 	int* stored_volume;
 	int i;
 	mutex_lock(&chip->mgr->mixer_mutex);
-	if(is_capture) {
-		if(is_aes)	stored_volume = chip->digital_capture_volume[1];	/* AES capture */
-		else		stored_volume = chip->digital_capture_volume[0];	/* analog capture */
+	if (is_capture) {
+		if (is_aes)	/* AES capture */
+			stored_volume = chip->digital_capture_volume[1];
+		else		/* analog capture */
+			stored_volume = chip->digital_capture_volume[0];
 	} else {
 		snd_assert ( idx < MIXART_PLAYBACK_STREAMS ); 
-		if(is_aes)	stored_volume = chip->digital_playback_volume[MIXART_PLAYBACK_STREAMS + idx]; /* AES playback */
-		else		stored_volume = chip->digital_playback_volume[idx];	/* analog playback */
+		if (is_aes)	/* AES playback */
+			stored_volume = chip->digital_playback_volume[MIXART_PLAYBACK_STREAMS + idx];
+		else		/* analog playback */
+			stored_volume = chip->digital_playback_volume[idx];
 	}
-	for(i=0; i<2; i++) {
-		if(stored_volume[i] != ucontrol->value.integer.value[i]) {
-			stored_volume[i] = ucontrol->value.integer.value[i];
+	for (i = 0; i < 2; i++) {
+		int vol = ucontrol->value.integer.value[i];
+		if (vol < MIXART_DIGITAL_LEVEL_MIN ||
+		    vol > MIXART_DIGITAL_LEVEL_MAX)
+			continue;
+		if (stored_volume[i] != vol) {
+			stored_volume[i] = vol;
 			changed = 1;
 		}
 	}
-	if(changed) {
-		if(is_capture)	mixart_update_capture_stream_level(chip, is_aes);
-		else		mixart_update_playback_stream_level(chip, is_aes, idx);
+	if (changed) {
+		if (is_capture)
+			mixart_update_capture_stream_level(chip, is_aes);
+		else
+			mixart_update_playback_stream_level(chip, is_aes, idx);
 	}
 	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
@@ -905,14 +930,18 @@
 	snd_assert ( idx < MIXART_PLAYBACK_STREAMS ); 
 	mutex_lock(&chip->mgr->mixer_mutex);
 	j = idx;
-	if(is_aes)	j += MIXART_PLAYBACK_STREAMS;
-	for(i=0; i<2; i++) {
-		if(chip->digital_playback_active[j][i] != ucontrol->value.integer.value[i]) {
-			chip->digital_playback_active[j][i] = ucontrol->value.integer.value[i];
+	if (is_aes)
+		j += MIXART_PLAYBACK_STREAMS;
+	for (i = 0; i < 2; i++) {
+		if (chip->digital_playback_active[j][i] !=
+		    ucontrol->value.integer.value[i]) {
+			chip->digital_playback_active[j][i] =
+				!!ucontrol->value.integer.value[i];
 			changed = 1;
 		}
 	}
-	if(changed)	mixart_update_playback_stream_level(chip, is_aes, idx);
+	if (changed)
+		mixart_update_playback_stream_level(chip, is_aes, idx);
 	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
@@ -975,9 +1004,11 @@
 	int changed = 0;
 	int i;
 	mutex_lock(&chip->mgr->mixer_mutex);
-	for(i=0; i<2; i++) {
-		if(chip->monitoring_volume[i] != ucontrol->value.integer.value[i]) {
-			chip->monitoring_volume[i] = ucontrol->value.integer.value[i];
+	for (i = 0; i < 2; i++) {
+		if (chip->monitoring_volume[i] !=
+		    ucontrol->value.integer.value[i]) {
+			chip->monitoring_volume[i] =
+				!!ucontrol->value.integer.value[i];
 			mixart_update_monitoring(chip, i);
 			changed = 1;
 		}
@@ -1017,24 +1048,35 @@
 	int changed = 0;
 	int i;
 	mutex_lock(&chip->mgr->mixer_mutex);
-	for(i=0; i<2; i++) {
-		if(chip->monitoring_active[i] != ucontrol->value.integer.value[i]) {
-			chip->monitoring_active[i] = ucontrol->value.integer.value[i];
+	for (i = 0; i < 2; i++) {
+		if (chip->monitoring_active[i] !=
+		    ucontrol->value.integer.value[i]) {
+			chip->monitoring_active[i] =
+				!!ucontrol->value.integer.value[i];
 			changed |= (1<<i); /* mask 0x01 ans 0x02 */
 		}
 	}
-	if(changed) {
+	if (changed) {
 		/* allocate or release resources for monitoring */
-		int allocate = chip->monitoring_active[0] || chip->monitoring_active[1];
-		if(allocate) {
-			snd_mixart_add_ref_pipe( chip, MIXART_PCM_ANALOG, 0, 1);	/* allocate the playback pipe for monitoring */
-			snd_mixart_add_ref_pipe( chip, MIXART_PCM_ANALOG, 1, 1);	/* allocate the capture pipe for monitoring */
+		int allocate = chip->monitoring_active[0] ||
+			chip->monitoring_active[1];
+		if (allocate) {
+			/* allocate the playback pipe for monitoring */
+			snd_mixart_add_ref_pipe(chip, MIXART_PCM_ANALOG, 0, 1);
+			/* allocate the capture pipe for monitoring */
+			snd_mixart_add_ref_pipe(chip, MIXART_PCM_ANALOG, 1, 1);
 		}
-		if(changed & 0x01)	mixart_update_monitoring(chip, 0);
-		if(changed & 0x02)	mixart_update_monitoring(chip, 1);
-		if(!allocate) {
-			snd_mixart_kill_ref_pipe( chip->mgr, &chip->pipe_in_ana, 1);	/* release the capture pipe for monitoring */
-			snd_mixart_kill_ref_pipe( chip->mgr, &chip->pipe_out_ana, 1);	/* release the playback pipe for monitoring */
+		if (changed & 0x01)
+			mixart_update_monitoring(chip, 0);
+		if (changed & 0x02)
+			mixart_update_monitoring(chip, 1);
+		if (!allocate) {
+			/* release the capture pipe for monitoring */
+			snd_mixart_kill_ref_pipe(chip->mgr,
+						 &chip->pipe_in_ana, 1);
+			/* release the playback pipe for monitoring */
+			snd_mixart_kill_ref_pipe(chip->mgr,
+						 &chip->pipe_out_ana, 1);
 		}
 	}