diff --git a/sys/dev/sound/pcm/channel.h b/sys/dev/sound/pcm/channel.h
--- a/sys/dev/sound/pcm/channel.h
+++ b/sys/dev/sound/pcm/channel.h
@@ -265,7 +265,6 @@
 int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
 int chn_kill(struct pcm_channel *c);
 int chn_reset(struct pcm_channel *c, u_int32_t fmt, u_int32_t spd);
-int chn_setvolume(struct pcm_channel *c, int left, int right);
 int chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right,
     int center);
 int chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val);
diff --git a/sys/dev/sound/pcm/channel.c b/sys/dev/sound/pcm/channel.c
--- a/sys/dev/sound/pcm/channel.c
+++ b/sys/dev/sound/pcm/channel.c
@@ -1301,19 +1301,6 @@
 	return (0);
 }
 
-/* XXX Obsolete. Use *_matrix() variant instead. */
-int
-chn_setvolume(struct pcm_channel *c, int left, int right)
-{
-	int ret;
-
-	ret = chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FL, left);
-	ret |= chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FR,
-	    right) << 8;
-
-	return (ret);
-}
-
 int
 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right,
     int center)