diff --git a/sndiod/dev.c b/sndiod/dev.c
index 401324d..823db06 100644
--- a/sndiod/dev.c
+++ b/sndiod/dev.c
@@ -32,9 +32,6 @@ void zomb_onvol(void *, unsigned int);
 void zomb_fill(void *);
 void zomb_flush(void *);
 void zomb_eof(void *);
-void zomb_mmcstart(void *);
-void zomb_mmcstop(void *);
-void zomb_mmcloc(void *, unsigned int);
 void zomb_exit(void *);
 
 void dev_log(struct dev *);
@@ -110,9 +107,6 @@ struct slotops zomb_slotops = {
 	zomb_fill,
 	zomb_flush,
 	zomb_eof,
-	zomb_mmcstart,
-	zomb_mmcstop,
-	zomb_mmcloc,
 	zomb_exit
 };
 
@@ -198,21 +192,6 @@ zomb_eof(void *arg)
 	s->ops = NULL;
 }
 
-void
-zomb_mmcstart(void *arg)
-{
-}
-
-void
-zomb_mmcstop(void *arg)
-{
-}
-
-void
-zomb_mmcloc(void *arg, unsigned int pos)
-{
-}
-
 void
 zomb_exit(void *arg)
 {
@@ -1414,9 +1393,6 @@ dev_mmcstart(struct dev *d)
 void
 dev_mmcstop(struct dev *d)
 {
-	int i;
-	struct slot *s;
-
 	switch (d->tstate) {
 	case MMC_START:
 		d->tstate = MMC_STOP;
@@ -1434,19 +1410,6 @@ dev_mmcstop(struct dev *d)
 #endif
 		return;
 	}
-	for (i = 0, s = d->slot; i < DEV_NSLOT; i++, s++) {
-		if (!s->ops)
-			continue;
-		if (s->tstate == MMC_RUN) {
-#ifdef DEBUG
-			if (log_level >= 3) {
-				slot_log(s);
-				log_puts(": requested to stop\n");
-			}
-#endif
-			s->ops->mmcstop(s->arg);
-		}
-	}
 }
 
 /*
@@ -1455,9 +1418,6 @@ dev_mmcstop(struct dev *d)
 void
 dev_mmcloc(struct dev *d, unsigned int origin)
 {
-	int i;
-	struct slot *s;
-
 	if (log_level >= 2) {
 		dev_log(d);
 		log_puts(": relocated to ");
@@ -1467,11 +1427,6 @@ dev_mmcloc(struct dev *d, unsigned int origin)
 	if (d->tstate == MMC_RUN)
 		dev_mmcstop(d);
 	d->mtc.origin = origin;
-	for (i = 0, s = d->slot; i < DEV_NSLOT; i++, s++) {
-		if (!s->ops)
-			continue;
-		s->ops->mmcloc(s->arg, d->mtc.origin);
-	}
 	if (d->tstate == MMC_RUN)
 		dev_mmcstart(d);
 }
diff --git a/sndiod/dev.h b/sndiod/dev.h
index ded94db..94bd748 100644
--- a/sndiod/dev.h
+++ b/sndiod/dev.h
@@ -32,9 +32,6 @@ struct slotops
 	void (*fill)(void *);			/* request to fill a play block */
 	void (*flush)(void *);			/* request to flush a rec block */
 	void (*eof)(void *);			/* notify that play drained */
-	void (*mmcstart)(void *);		/* request to start */
-	void (*mmcstop)(void *);		/* request to stop */
-	void (*mmcloc)(void *, unsigned int);	/* relocate to new position */
 	void (*exit)(void *);			/* delete client */
 };
 
diff --git a/sndiod/sock.c b/sndiod/sock.c
index f511ce0..277809d 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -43,9 +43,6 @@ void sock_midi_imsg(void *, unsigned char *, int);
 void sock_midi_omsg(void *, unsigned char *, int);
 void sock_midi_fill(void *, int);
 struct sock *sock_new(int);
-void sock_slot_mmcstart(void *);
-void sock_slot_mmcstop(void *);
-void sock_slot_mmcloc(void *, unsigned int);
 void sock_exit(void *);
 int sock_fdwrite(struct sock *, void *, int);
 int sock_fdread(struct sock *, void *, int);
@@ -81,9 +78,6 @@ struct slotops sock_slotops = {
 	sock_slot_fill,
 	sock_slot_flush,
 	sock_slot_eof,
-	sock_slot_mmcstart,
-	sock_slot_mmcstop,
-	sock_slot_mmcloc,
 	sock_exit
 };
 
@@ -302,45 +296,6 @@ sock_new(int fd)
 	return f;
 }
 
-void
-sock_slot_mmcstart(void *arg)
-{
-#ifdef DEBUG
-	struct sock *f = (struct sock *)arg;
-
-	if (log_level >= 3) {
-		sock_log(f);
-		log_puts(": ignored mmc start signal\n");
-	}
-#endif
-}
-
-void
-sock_slot_mmcstop(void *arg)
-{
-#ifdef DEBUG
-	struct sock *f = (struct sock *)arg;
-
-	if (log_level >= 3) {
-		sock_log(f);
-		log_puts(": ignored mmc stop signal\n");
-	}
-#endif
-}
-
-void
-sock_slot_mmcloc(void *arg, unsigned int mmcpos)
-{
-#ifdef DEBUG
-	struct sock *f = (struct sock *)arg;
-
-	if (log_level >= 3) {
-		sock_log(f);
-		log_puts(": ignored mmc relocate signal\n");
-	}
-#endif
-}
-
 void
 sock_exit(void *arg)
 {