diff --git a/include/sound/cs4231.h b/include/sound/cs4231.h
index ab51ce1ba9a5..b195a73c5685 100644
--- a/include/sound/cs4231.h
+++ b/include/sound/cs4231.h
@@ -210,7 +210,7 @@
 #define CS4231_HW_CS4239	0x0404	/* CS4239 - Crystal Clear (tm) stereo enhancement */
 /* compatible, but clones */
 #define CS4231_HW_INTERWAVE     0x1000	/* InterWave chip */
-#define CS4231_HW_OPL3SA2       0x1001	/* OPL3-SA2 chip */
+#define CS4231_HW_OPL3SA2       0x1101	/* OPL3-SA2 chip, similar to cs4231 */
 
 /* defines for codec.hwshare */
 #define CS4231_HWSHARE_IRQ	(1<<0)
diff --git a/sound/isa/cs423x/cs4231_lib.c b/sound/isa/cs423x/cs4231_lib.c
index 914d77b61b0c..642bdaa703be 100644
--- a/sound/isa/cs423x/cs4231_lib.c
+++ b/sound/isa/cs423x/cs4231_lib.c
@@ -555,6 +555,8 @@ static void snd_cs4231_playback_format(struct snd_cs4231 *chip,
 			snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
 		}
 		spin_unlock_irqrestore(&chip->reg_lock, flags);
+		if (chip->hardware == CS4231_HW_OPL3SA2)
+			udelay(100);	/* this seems to help */
 		snd_cs4231_mce_down(chip);
 	}
 	snd_cs4231_calibrate_mute(chip, 0);
diff --git a/sound/isa/opl3sa2.c b/sound/isa/opl3sa2.c
index e70db32991d9..244a00296750 100644
--- a/sound/isa/opl3sa2.c
+++ b/sound/isa/opl3sa2.c
@@ -253,6 +253,7 @@ static int __devinit snd_opl3sa2_detect(struct snd_opl3sa2 *chip)
 		/* 0x03 - YM715B */
 		/* 0x04 - YM719 - OPL-SA4? */
 		/* 0x05 - OPL3-SA3 - Libretto 100 */
+		/* 0x07 - unknown - Neomagic MagicWave 3D */
 		break;
 	}
 	str[0] = chip->version + '0';