diff --git a/aucat/midi.c b/aucat/midi.c
index fb7054c..cc51520 100644
--- a/aucat/midi.c
+++ b/aucat/midi.c
@@ -785,7 +785,7 @@ ctl_trystart(struct aproc *p, int caller)
  * allocate a new slot and register the given call-backs
  */
 int
-ctl_slotnew(struct aproc *p, char *who, struct ctl_ops *ops, void *arg, int tr)
+ctl_slotnew(struct aproc *p, char *who, struct ctl_ops *ops, void *arg, int mmc)
 {
 	int idx;
 	struct ctl_slot *s;
@@ -807,7 +807,7 @@ ctl_slotnew(struct aproc *p, char *who, struct ctl_ops *ops, void *arg, int tr)
 	s = p->u.ctl.slot + idx;
 	s->ops = ops;
 	s->arg = arg;
-	s->tstate = tr ? CTL_STOP : CTL_OFF;
+	s->tstate = mmc ? CTL_STOP : CTL_OFF;
 	s->ops->vol(s->arg, s->vol);
 	ctl_msg_info(p, idx, msg);
 	ctl_sendmsg(p, NULL, msg, SYSEX_SIZE(mixinfo));
diff --git a/aucat/wav.c b/aucat/wav.c
index fe67e95..20c1dc7 100644
--- a/aucat/wav.c
+++ b/aucat/wav.c
@@ -771,7 +771,7 @@ wav_autohdr(char *name, struct dev *dev, unsigned *hdr, unsigned *mode)
 struct wav *
 wav_new_in(struct fileops *ops, struct dev *dev,
     unsigned mode, char *name, unsigned hdr,
-    struct aparams *par, unsigned xrun, unsigned volctl, int tr, int join)
+    struct aparams *par, unsigned xrun, unsigned volctl, int mmc, int join)
 {
 	int fd;
 	struct wav *f;
@@ -816,7 +816,7 @@ wav_new_in(struct fileops *ops, struct dev *dev,
 		f->map = NULL;
 	}
 	f->dev = dev;
-	f->mmc = tr;
+	f->mmc = mmc;
 	f->join = join;
 	f->mode = mode;
 	f->hpar = *par;
@@ -855,7 +855,7 @@ wav_new_in(struct fileops *ops, struct dev *dev,
 struct wav *
 wav_new_out(struct fileops *ops, struct dev *dev,
     unsigned mode, char *name, unsigned hdr,
-    struct aparams *par, unsigned xrun, int tr, int join)
+    struct aparams *par, unsigned xrun, int mmc, int join)
 {
 	int fd;
 	struct wav *f;
@@ -895,7 +895,7 @@ wav_new_out(struct fileops *ops, struct dev *dev,
 		f->startpos = f->endpos = 0;
 	}
 	f->dev = dev;
-	f->mmc = tr;
+	f->mmc = mmc;
 	f->join = join;
 	f->mode = mode;
 	f->hpar = *par;