--- sys/dev/sound/usb/uaudio.c.orig	(revision 194047)
+++ sys/dev/sound/usb/uaudio.c	(working copy)
@@ -1361,13 +1361,18 @@
 	ch->pcm_cap.minspeed = ch->sample_rate;
 	ch->pcm_cap.maxspeed = ch->sample_rate;
 
-	if (ch->p_asf1d->bNrChannels >= 2)
-		ch->pcm_cap.fmtlist[0] =
-		    SND_FORMAT(ch->p_fmt->freebsd_fmt, 2, 0);
-	else
-		ch->pcm_cap.fmtlist[0] =
-		    SND_FORMAT(ch->p_fmt->freebsd_fmt, 1, 0);
+	ch->pcm_cap.fmtlist[0] =
+	    feeder_matrix_default_format(SND_FORMAT(ch->p_fmt->freebsd_fmt,
+	    ch->p_asf1d->bNrChannels, 0));
+	if (ch->pcm_cap.fmtlist[0] == 0) {
+		if (ch->p_asf1d->bNrChannels >= 2)
+			ch->pcm_cap.fmtlist[0] =
+			    SND_FORMAT(ch->p_fmt->freebsd_fmt, 2, 0);
+		else
+			ch->pcm_cap.fmtlist[0] =
+			    SND_FORMAT(ch->p_fmt->freebsd_fmt, 1, 0);
 
+	}
 	ch->pcm_cap.fmtlist[1] = 0;