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
@@ -260,6 +260,7 @@
 int chn_flush(struct pcm_channel *c);
 int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
 
+char *chn_mkname(char *buf, size_t len, struct pcm_channel *c);
 struct pcm_channel *chn_init(struct snddev_info *d, struct pcm_channel *parent,
     kobj_class_t cls, int dir, void *devinfo);
 void chn_kill(struct pcm_channel *c);
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
@@ -1161,13 +1161,13 @@
 chn_getunr(struct snddev_info *d, int type)
 {
 	switch (type) {
-	case SND_DEV_DSPHW_PLAY:
+	case PCMDIR_PLAY:
 		return (d->p_unr);
-	case SND_DEV_DSPHW_VPLAY:
+	case PCMDIR_PLAY_VIRTUAL:
 		return (d->vp_unr);
-	case SND_DEV_DSPHW_REC:
+	case PCMDIR_REC:
 		return (d->r_unr);
-	case SND_DEV_DSPHW_VREC:
+	case PCMDIR_REC_VIRTUAL:
 		return (d->vr_unr);
 	default:
 		__assert_unreachable();
@@ -1175,6 +1175,37 @@
 
 }
 
+char *
+chn_mkname(char *buf, size_t len, struct pcm_channel *c)
+{
+	const char *str;
+
+	KASSERT(buf != NULL && len != 0,
+	    ("%s(): bogus buf=%p len=%lu", __func__, buf, len));
+
+	switch (c->type) {
+	case PCMDIR_PLAY:
+		str = "play";
+		break;
+	case PCMDIR_PLAY_VIRTUAL:
+		str = "virtual_play";
+		break;
+	case PCMDIR_REC:
+		str = "record";
+		break;
+	case PCMDIR_REC_VIRTUAL:
+		str = "virtual_record";
+		break;
+	default:
+		__assert_unreachable();
+	}
+
+	snprintf(buf, len, "dsp%d.%s.%d",
+	    device_get_unit(c->dev), str, c->unit);
+
+	return (buf);
+}
+
 struct pcm_channel *
 chn_init(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls,
     int dir, void *devinfo)
@@ -1183,27 +1214,19 @@
 	struct feeder_class *fc;
 	struct snd_dbuf *b, *bs;
 	char buf[CHN_NAMELEN];
-	int i, direction, type;
+	int i, direction;
 
 	PCM_BUSYASSERT(d);
 	PCM_LOCKASSERT(d);
 
 	switch (dir) {
 	case PCMDIR_PLAY:
-		direction = PCMDIR_PLAY;
-		type = SND_DEV_DSPHW_PLAY;
-		break;
 	case PCMDIR_PLAY_VIRTUAL:
 		direction = PCMDIR_PLAY;
-		type = SND_DEV_DSPHW_VPLAY;
 		break;
 	case PCMDIR_REC:
-		direction = PCMDIR_REC;
-		type = SND_DEV_DSPHW_REC;
-		break;
 	case PCMDIR_REC_VIRTUAL:
 		direction = PCMDIR_REC;
-		type = SND_DEV_DSPHW_VREC;
 		break;
 	default:
 		device_printf(d->dev,
@@ -1222,7 +1245,7 @@
 	CHN_INIT(c, children);
 	CHN_INIT(c, children.busy);
 	c->direction = direction;
-	c->type = type;
+	c->type = dir;
 	c->unit = alloc_unr(chn_getunr(d, c->type));
 	c->format = SND_FORMAT(AFMT_U8, 1, 0);
 	c->speed = DSP_DEFAULT_SPEED;
@@ -1234,8 +1257,7 @@
 	c->parentchannel = parent;
 	c->dev = d->dev;
 	c->trigger = PCMTRIG_STOP;
-
-	strlcpy(c->name, dsp_unit2name(buf, sizeof(buf), c), sizeof(c->name));
+	strlcpy(c->name, chn_mkname(buf, sizeof(buf), c), sizeof(c->name));
 
 	c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0);
 	c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
@@ -1303,16 +1325,16 @@
 	CHN_INSERT_SORT_ASCEND(d, c, channels.pcm);
 
 	switch (c->type) {
-	case SND_DEV_DSPHW_PLAY:
+	case PCMDIR_PLAY:
 		d->playcount++;
 		break;
-	case SND_DEV_DSPHW_VPLAY:
+	case PCMDIR_PLAY_VIRTUAL:
 		d->pvchancount++;
 		break;
-	case SND_DEV_DSPHW_REC:
+	case PCMDIR_REC:
 		d->reccount++;
 		break;
-	case SND_DEV_DSPHW_VREC:
+	case PCMDIR_REC_VIRTUAL:
 		d->rvchancount++;
 		break;
 	default:
@@ -1354,16 +1376,16 @@
 	CHN_REMOVE(d, c, channels.pcm);
 
 	switch (c->type) {
-	case SND_DEV_DSPHW_PLAY:
+	case PCMDIR_PLAY:
 		d->playcount--;
 		break;
-	case SND_DEV_DSPHW_VPLAY:
+	case PCMDIR_PLAY_VIRTUAL:
 		d->pvchancount--;
 		break;
-	case SND_DEV_DSPHW_REC:
+	case PCMDIR_REC:
 		d->reccount--;
 		break;
-	case SND_DEV_DSPHW_VREC:
+	case PCMDIR_REC_VIRTUAL:
 		d->rvchancount--;
 		break;
 	default:
diff --git a/sys/dev/sound/pcm/dsp.h b/sys/dev/sound/pcm/dsp.h
--- a/sys/dev/sound/pcm/dsp.h
+++ b/sys/dev/sound/pcm/dsp.h
@@ -35,7 +35,6 @@
 
 int dsp_make_dev(device_t);
 void dsp_destroy_dev(device_t);
-char *dsp_unit2name(char *, size_t, struct pcm_channel *);
 int dsp_oss_audioinfo(struct cdev *, oss_audioinfo *, bool);
 int dsp_oss_engineinfo(struct cdev *, oss_audioinfo *);
 
diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -164,25 +164,6 @@
 #define DSP_F_READ(x)		((x) & FREAD)
 #define DSP_F_WRITE(x)		((x) & FWRITE)
 
-static const struct {
-	int type;
-	char *name;
-	char *sep;
-	char *alias;
-} dsp_cdevs[] = {
-	{ SND_DEV_DSP,         "dsp",	".",			NULL },
-	{ SND_DEV_DSPHW_PLAY,  "dsp",   ".play.",		NULL },
-	{ SND_DEV_DSPHW_VPLAY, "dsp",	".virtual_play.",	NULL },
-	{ SND_DEV_DSPHW_REC,   "dsp",   ".record.",		NULL },
-	{ SND_DEV_DSPHW_VREC,  "dsp",	".virtual_record.",	NULL },
-	/* Low priority, OSSv4 aliases. */
-	{ SND_DEV_DSP,      "dsp_ac3",   ".",			"dsp" },
-	{ SND_DEV_DSP,     "dsp_mmap",   ".",			"dsp" },
-	{ SND_DEV_DSP,  "dsp_multich",   ".",			"dsp" },
-	{ SND_DEV_DSP, "dsp_spdifout",   ".",			"dsp" },
-	{ SND_DEV_DSP,  "dsp_spdifin",   ".",			"dsp" },
-};
-
 static void
 dsp_close(void *data)
 {
@@ -1941,6 +1922,14 @@
 	return (0);
 }
 
+static const char *dsp_aliases[] = {
+	"dsp_ac3",
+	"dsp_mmap",
+	"dsp_multich",
+	"dsp_spdifout",
+	"dsp_spdifin",
+};
+
 static void
 dsp_clone(void *arg, struct ucred *cred, char *name, int namelen,
     struct cdev **dev)
@@ -1952,9 +1941,8 @@
 		return;
 	if (strcmp(name, "dsp") == 0 && dsp_basename_clone)
 		goto found;
-	for (i = 0; i < nitems(dsp_cdevs); i++) {
-		if (dsp_cdevs[i].alias != NULL &&
-		    strcmp(name, dsp_cdevs[i].name) == 0)
+	for (i = 0; i < nitems(dsp_aliases); i++) {
+		if (strcmp(name, dsp_aliases[i]) == 0)
 			goto found;
 	}
 	return;
@@ -1994,26 +1982,6 @@
 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL);
 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL);
 
-char *
-dsp_unit2name(char *buf, size_t len, struct pcm_channel *ch)
-{
-	size_t i;
-
-	KASSERT(buf != NULL && len != 0,
-	    ("bogus buf=%p len=%ju", buf, (uintmax_t)len));
-
-	for (i = 0; i < nitems(dsp_cdevs); i++) {
-		if (ch->type != dsp_cdevs[i].type || dsp_cdevs[i].alias != NULL)
-			continue;
-		snprintf(buf, len, "%s%d%s%d",
-		    dsp_cdevs[i].name, device_get_unit(ch->dev),
-		    dsp_cdevs[i].sep, ch->unit);
-		return (buf);
-	}
-
-	return (NULL);
-}
-
 static void
 dsp_oss_audioinfo_unavail(oss_audioinfo *ai, int unit)
 {
@@ -2233,7 +2201,6 @@
 	struct snddev_info *d;
 	uint32_t fmts;
 	int i, nchan, *rates, minch, maxch, unit;
-	char *devname, buf[CHN_NAMELEN];
 
 	/*
 	 * If probing the device that received the ioctl, make sure it's a
@@ -2244,9 +2211,7 @@
 		return (EINVAL);
 
 	ch = NULL;
-	devname = NULL;
 	nchan = 0;
-	bzero(buf, sizeof(buf));
 
 	/*
 	 * Search for the requested audio device (channel).  Start by
@@ -2267,147 +2232,142 @@
 		CHN_FOREACH(ch, d, channels.pcm) {
 			CHN_UNLOCKASSERT(ch);
 			CHN_LOCK(ch);
-			if (ai->dev == -1) {
-				if (devfs_foreach_cdevpriv(i_dev,
-				    dsp_oss_engineinfo_cb, ch) != 0) {
-					devname = dsp_unit2name(buf,
-					    sizeof(buf), ch);
-				}
-			} else if (ai->dev == nchan)
-				devname = dsp_unit2name(buf, sizeof(buf), ch);
-			if (devname != NULL)
+			if ((ai->dev == -1 && devfs_foreach_cdevpriv(
+			    i_dev, dsp_oss_engineinfo_cb, ch) != 0) ||
+			    ai->dev == nchan)
 				break;
 			CHN_UNLOCK(ch);
 			++nchan;
 		}
 
-		if (devname != NULL) {
-			/*
-			 * At this point, the following synchronization stuff
-			 * has happened:
-			 * - a specific PCM device is locked.
-			 * - a specific audio channel has been locked, so be
-			 *   sure to unlock when exiting;
-			 */
+		if (ch == NULL) {
+			PCM_UNLOCK(d);
+			continue;
+		}
 
-			caps = chn_getcaps(ch);
+		/*
+		 * At this point, the following synchronization stuff
+		 * has happened:
+		 * - a specific PCM device is locked.
+		 * - a specific audio channel has been locked, so be
+		 *   sure to unlock when exiting;
+		 */
 
-			/*
-			 * With all handles collected, zero out the user's
-			 * container and begin filling in its fields.
-			 */
-			bzero((void *)ai, sizeof(oss_audioinfo));
+		caps = chn_getcaps(ch);
 
-			ai->dev = nchan;
-			strlcpy(ai->name, ch->name,  sizeof(ai->name));
+		/*
+		 * With all handles collected, zero out the user's
+		 * container and begin filling in its fields.
+		 */
+		bzero((void *)ai, sizeof(oss_audioinfo));
 
-			if ((ch->flags & CHN_F_BUSY) == 0)
-				ai->busy = 0;
-			else
-				ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
+		ai->dev = nchan;
+		strlcpy(ai->name, ch->name,  sizeof(ai->name));
 
-			ai->pid = ch->pid;
-			strlcpy(ai->cmd, ch->comm, sizeof(ai->cmd));
+		if ((ch->flags & CHN_F_BUSY) == 0)
+			ai->busy = 0;
+		else
+			ai->busy = (ch->direction == PCMDIR_PLAY) ? OPEN_WRITE : OPEN_READ;
 
-			/*
-			 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
-			 * Note, however, that a single channel operates in
-			 * only one direction, so PCM_CAP_DUPLEX is out.
-			 */
-			/**
-			 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
-			 *       these in pcmchan::caps?
-			 */
-			ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
-			    ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) |
-			    ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
+		ai->pid = ch->pid;
+		strlcpy(ai->cmd, ch->comm, sizeof(ai->cmd));
 
-			/*
-			 * Collect formats supported @b natively by the
-			 * device.  Also determine min/max channels.
-			 */
-			minch = INT_MAX;
-			maxch = 0;
-			fmts = 0;
-			for (i = 0; caps->fmtlist[i]; i++) {
-				fmts |= AFMT_ENCODING(caps->fmtlist[i]);
-				minch = min(AFMT_CHANNEL(caps->fmtlist[i]), minch);
-				maxch = max(AFMT_CHANNEL(caps->fmtlist[i]), maxch);
-			}
+		/*
+		 * These flags stolen from SNDCTL_DSP_GETCAPS handler.
+		 * Note, however, that a single channel operates in
+		 * only one direction, so PCM_CAP_DUPLEX is out.
+		 */
+		/**
+		 * @todo @c SNDCTL_AUDIOINFO::caps - Make drivers keep
+		 *       these in pcmchan::caps?
+		 */
+		ai->caps = PCM_CAP_REALTIME | PCM_CAP_MMAP | PCM_CAP_TRIGGER |
+		    ((ch->flags & CHN_F_VIRTUAL) ? PCM_CAP_VIRTUAL : 0) |
+		    ((ch->direction == PCMDIR_PLAY) ? PCM_CAP_OUTPUT : PCM_CAP_INPUT);
 
-			if (ch->direction == PCMDIR_PLAY)
-				ai->oformats = fmts;
-			else
-				ai->iformats = fmts;
-
-			/**
-			 * @note
-			 * @c magic - OSSv4 docs: "Reserved for internal use
-			 *    by OSS."
-			 *
-			 * @par
-			 * @c card_number - OSSv4 docs: "Number of the sound
-			 *    card where this device belongs or -1 if this
-			 *    information is not available.  Applications
-			 *    should normally not use this field for any
-			 *    purpose."
-			 */
-			ai->card_number = unit;
-			/**
-			 * @todo @c song_name - depends first on
-			 *          SNDCTL_[GS]ETSONG @todo @c label - depends
-			 *          on SNDCTL_[GS]ETLABEL
-			 * @todo @c port_number - routing information?
-			 */
-			ai->port_number = unit;
-			ai->mixer_dev = (d->mixer_dev != NULL) ? unit : -1;
-			/**
-			 * @note
-			 * @c legacy_device - OSSv4 docs:  "Obsolete."
-			 */
-			ai->legacy_device = unit;
-			snprintf(ai->devnode, sizeof(ai->devnode), "/dev/dsp%d", unit);
-			ai->enabled = device_is_attached(d->dev) ? 1 : 0;
-			/**
-			 * @note
-			 * @c flags - OSSv4 docs: "Reserved for future use."
-			 *
-			 * @note
-			 * @c binding - OSSv4 docs: "Reserved for future use."
-			 *
-			 * @todo @c handle - haven't decided how to generate
-			 *       this yet; bus, vendor, device IDs?
-			 */
+		/*
+		 * Collect formats supported @b natively by the
+		 * device.  Also determine min/max channels.
+		 */
+		minch = INT_MAX;
+		maxch = 0;
+		fmts = 0;
+		for (i = 0; caps->fmtlist[i]; i++) {
+			fmts |= AFMT_ENCODING(caps->fmtlist[i]);
+			minch = min(AFMT_CHANNEL(caps->fmtlist[i]), minch);
+			maxch = max(AFMT_CHANNEL(caps->fmtlist[i]), maxch);
+		}
 
-			if ((ch->flags & CHN_F_EXCLUSIVE) ||
-			    (pcm_getflags(d->dev) & SD_F_BITPERFECT)) {
-				ai->min_rate = caps->minspeed;
-				ai->max_rate = caps->maxspeed;
-			} else {
-				ai->min_rate = feeder_rate_min;
-				ai->max_rate = feeder_rate_max;
-			}
+		if (ch->direction == PCMDIR_PLAY)
+			ai->oformats = fmts;
+		else
+			ai->iformats = fmts;
+
+		/**
+		 * @note
+		 * @c magic - OSSv4 docs: "Reserved for internal use
+		 *    by OSS."
+		 *
+		 * @par
+		 * @c card_number - OSSv4 docs: "Number of the sound
+		 *    card where this device belongs or -1 if this
+		 *    information is not available.  Applications
+		 *    should normally not use this field for any
+		 *    purpose."
+		 */
+		ai->card_number = unit;
+		/**
+		 * @todo @c song_name - depends first on
+		 *          SNDCTL_[GS]ETSONG @todo @c label - depends
+		 *          on SNDCTL_[GS]ETLABEL
+		 * @todo @c port_number - routing information?
+		 */
+		ai->port_number = unit;
+		ai->mixer_dev = (d->mixer_dev != NULL) ? unit : -1;
+		/**
+		 * @note
+		 * @c legacy_device - OSSv4 docs:  "Obsolete."
+		 */
+		ai->legacy_device = unit;
+		snprintf(ai->devnode, sizeof(ai->devnode), "/dev/dsp%d", unit);
+		ai->enabled = device_is_attached(d->dev) ? 1 : 0;
+		/**
+		 * @note
+		 * @c flags - OSSv4 docs: "Reserved for future use."
+		 *
+		 * @note
+		 * @c binding - OSSv4 docs: "Reserved for future use."
+		 *
+		 * @todo @c handle - haven't decided how to generate
+		 *       this yet; bus, vendor, device IDs?
+		 */
 
-			ai->min_channels = minch;
-			ai->max_channels = maxch;
+		if ((ch->flags & CHN_F_EXCLUSIVE) ||
+		    (pcm_getflags(d->dev) & SD_F_BITPERFECT)) {
+			ai->min_rate = caps->minspeed;
+			ai->max_rate = caps->maxspeed;
+		} else {
+			ai->min_rate = feeder_rate_min;
+			ai->max_rate = feeder_rate_max;
+		}
 
-			ai->nrates = chn_getrates(ch, &rates);
-			if (ai->nrates > OSS_MAX_SAMPLE_RATES)
-				ai->nrates = OSS_MAX_SAMPLE_RATES;
+		ai->min_channels = minch;
+		ai->max_channels = maxch;
 
-			for (i = 0; i < ai->nrates; i++)
-				ai->rates[i] = rates[i];
-			
-			ai->next_play_engine = 0;
-			ai->next_rec_engine = 0;
+		ai->nrates = chn_getrates(ch, &rates);
+		if (ai->nrates > OSS_MAX_SAMPLE_RATES)
+			ai->nrates = OSS_MAX_SAMPLE_RATES;
 
-			CHN_UNLOCK(ch);
-		}
+		for (i = 0; i < ai->nrates; i++)
+			ai->rates[i] = rates[i];
+
+		ai->next_play_engine = 0;
+		ai->next_rec_engine = 0;
 
+		CHN_UNLOCK(ch);
 		PCM_UNLOCK(d);
 
-		if (devname != NULL)
-			return (0);
+		return (0);
 	}
 
 	/* Exhausted the search -- nothing is locked, so return. */
diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h
--- a/sys/dev/sound/pcm/sound.h
+++ b/sys/dev/sound/pcm/sound.h
@@ -225,10 +225,6 @@
 	SND_DEV_MIDIN,		/* Raw midi access */
 	SND_DEV_DSP,		/* Digitized voice /dev/dsp */
 	SND_DEV_STATUS,		/* /dev/sndstat */
-	SND_DEV_DSPHW_PLAY,	/* specific playback channel */
-	SND_DEV_DSPHW_VPLAY,	/* specific virtual playback channel */
-	SND_DEV_DSPHW_REC,	/* specific record channel */
-	SND_DEV_DSPHW_VREC,	/* specific virtual record channel */
 };
 
 #define DSP_DEFAULT_SPEED	8000
diff --git a/sys/dev/sound/pcm/vchan.c b/sys/dev/sound/pcm/vchan.c
--- a/sys/dev/sound/pcm/vchan.c
+++ b/sys/dev/sound/pcm/vchan.c
@@ -886,14 +886,9 @@
 		c->flags |= CHN_F_DIRTY;
 
 #ifdef SND_DEBUG
-	if (snd_passthrough_verbose != 0) {
-		char *devname, buf[CHN_NAMELEN];
-
-		devname = dsp_unit2name(buf, sizeof(buf), c);
-		device_printf(c->dev,
-		    "%s(%s/%s) %s() -> re-sync err=%d\n",
-		    __func__, (devname != NULL) ? devname : "dspX", c->comm,
-		    caller, ret);
+	if (snd_passthrough_verbose) {
+		device_printf(c->dev, "%s(%s/%s) %s() -> re-sync err=%d\n",
+		    __func__, c->name, c->comm, caller, ret);
 	}
 #endif