[PATCH] ALSA: usb-audio: Add implicit feedback quirk for MODX

["Geoffrey D. Bennett" <g@xxxxx>]

This patch fixes audio distortion on playback for the Yamaha MODX.

Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
Tested-by: Frank Slotta <frank.slotta@xxxxxxxxx>
---

 pcm.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index b401ee894e1b..22fbd1f48b3e 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -345,6 +345,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
+	case USB_ID(0x0499, 0x172a): /* Yamaha MODX */
 		ep = 0x86;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;