diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
index d13cd276ec61..333689f31775 100644
--- a/sound/hda/codecs/realtek/alc269.c
+++ b/sound/hda/codecs/realtek/alc269.c
@@ -4025,6 +4025,7 @@ enum {
 	ALC269_FIXUP_SONY_VAIO,
 	ALC275_FIXUP_SONY_VAIO_GPIO2,
 	ALC269_FIXUP_DELL_M101Z,
+	ALC256_FIXUP_ASUS_PM3406CHA,
 	ALC269_FIXUP_SKU_IGNORE,
 	ALC269_FIXUP_ASUS_G73JW,
 	ALC269_FIXUP_ASUS_N7601ZM_PINS,
@@ -4484,6 +4485,14 @@ static const struct hda_fixup alc269_fixups[] = {
 			{}
 		}
 	},
+	[ALC256_FIXUP_ASUS_PM3406CHA] = {
+		.type = HDA_FIXUP_VERBS,
+		.v.verbs = (const struct hda_verb[]) {
+			{ 0x20, AC_VERB_SET_COEF_INDEX, 0x10 },
+			{ 0x20, AC_VERB_SET_PROC_COEF, 0x7f20 },
+			{}
+		}
+	},
 	[ALC269_FIXUP_SKU_IGNORE] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = alc_fixup_sku_ignore,
@@ -7853,6 +7862,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x1652, "ASUS ROG Zephyrus Do 15 SE", ALC289_FIXUP_ASUS_ZEPHYRUS_DUAL_SPK),
 	SND_PCI_QUIRK(0x1043, 0x1662, "ASUS GV301QH", ALC294_FIXUP_ASUS_DUAL_SPK),
 	SND_PCI_QUIRK(0x1043, 0x1663, "ASUS GU603ZI/ZJ/ZQ/ZU/ZV", ALC285_FIXUP_ASUS_HEADSET_MIC),
+	SND_PCI_QUIRK(0x1043, 0x1664, "ASUS ExpertBook PM3406CHA", ALC256_FIXUP_ASUS_PM3406CHA),
 	SND_PCI_QUIRK(0x1043, 0x1683, "ASUS UM3402YAR", ALC287_FIXUP_CS35L41_I2C_2),
 	SND_PCI_QUIRK(0x1043, 0x16a3, "ASUS UX3402VA", ALC245_FIXUP_CS35L41_SPI_2),
 	SND_PCI_QUIRK(0x1043, 0x16b2, "ASUS GU603", ALC289_FIXUP_ASUS_GA401),