diff --git a/sndiod/dev.c b/sndiod/dev.c
index 84d42dc..0532dfa 100644
--- a/sndiod/dev.c
+++ b/sndiod/dev.c
@@ -1426,7 +1426,7 @@ slot_allocbufs(struct slot *s)
 		abuf_init(&s->mix.buf, s->appbufsz * s->mix.bpf);
 
 		slot_nch = s->mix.slot_cmax - s->mix.slot_cmin + 1;
-		dev_nch = s->mix.dev_cmax - s->mix.dev_cmin + 1;
+		dev_nch = s->opt->pmax - s->opt->pmin + 1;
 		s->mix.decbuf = NULL;
 		s->mix.resampbuf = NULL;
 		s->mix.join = 1;
@@ -1441,7 +1441,7 @@ slot_allocbufs(struct slot *s)
 		    s->mix.slot_cmin, s->mix.slot_cmax,
 		    s->mix.slot_cmin, s->mix.slot_cmax,
 		    0, d->pchan - 1,
-		    s->mix.dev_cmin, s->mix.dev_cmax);
+		    s->opt->pmin, s->opt->pmax);
 		if (!aparams_native(&s->par)) {
 			dec_init(&s->mix.dec, &s->par, slot_nch);
 			s->mix.decbuf =
@@ -1461,7 +1461,7 @@ slot_allocbufs(struct slot *s)
 		abuf_init(&s->sub.buf, s->appbufsz * s->sub.bpf);
 
 		slot_nch = s->sub.slot_cmax - s->sub.slot_cmin + 1;
-		dev_nch = s->sub.dev_cmax - s->sub.dev_cmin + 1;
+		dev_nch = s->opt->rmax - s->opt->rmin + 1;
 		s->sub.encbuf = NULL;
 		s->sub.resampbuf = NULL;
 		s->sub.join = 1;
@@ -1474,7 +1474,7 @@ slot_allocbufs(struct slot *s)
 		}
 		cmap_init(&s->sub.cmap,
 		    0, ((s->mode & MODE_MON) ? d->pchan : d->rchan) - 1,
-		    s->sub.dev_cmin, s->sub.dev_cmax,
+		    s->opt->rmin, s->opt->rmax,
 		    s->sub.slot_cmin, s->sub.slot_cmax,
 		    s->sub.slot_cmin, s->sub.slot_cmax);
 		if (s->rate != d->rate) {
@@ -1671,12 +1671,12 @@ found:
 	s->mode = mode;
 	aparams_init(&s->par);
 	if (s->mode & MODE_PLAY) {
-		s->mix.slot_cmin = s->mix.dev_cmin = s->opt->pmin;
-		s->mix.slot_cmax = s->mix.dev_cmax = s->opt->pmax;
+		s->mix.slot_cmin = s->opt->pmin;
+		s->mix.slot_cmax = s->opt->pmax;
 	}
 	if (s->mode & MODE_RECMASK) {
-		s->sub.slot_cmin = s->sub.dev_cmin = s->opt->rmin;
-		s->sub.slot_cmax = s->sub.dev_cmax = s->opt->rmax;
+		s->sub.slot_cmin = s->opt->rmin;
+		s->sub.slot_cmax = s->opt->rmax;
 	}
 	if (s->opt->mmc) {
 		s->xrun = XRUN_SYNC;
diff --git a/sndiod/dev.h b/sndiod/dev.h
index c0c4fff..fd9f23f 100644
--- a/sndiod/dev.h
+++ b/sndiod/dev.h
@@ -48,7 +48,6 @@ struct slot {
 		struct abuf buf;		/* socket side buffer */
 		int bpf;			/* byte per frame */
 		int slot_cmin, slot_cmax;	/* slot source chans */
-		int dev_cmin, dev_cmax;		/* device destination chans */
 		struct cmap cmap;		/* channel mapper state */
 		struct resamp resamp;		/* resampler state */
 		struct conv dec;		/* format decoder params */
@@ -61,7 +60,6 @@ struct slot {
 		int prime;			/* initial cycles to skip */
 		int bpf;			/* byte per frame */
 		int slot_cmin, slot_cmax;	/* slot destination chans */
-		int dev_cmin, dev_cmax;		/* device source chans */
 		struct cmap cmap;		/* channel mapper state */
 		struct resamp resamp;		/* buffer for resampling */
 		struct conv enc;		/* buffer for encoding */
diff --git a/sndiod/sock.c b/sndiod/sock.c
index cb09f22..2b6f7de 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -628,14 +628,13 @@ sock_setpar(struct sock *f)
 		else if (rchan > NCHAN_MAX)
 			rchan = NCHAN_MAX;
 		s->sub.slot_cmax = s->opt->rmin + rchan - 1;
-		s->sub.dev_cmax = s->opt->rmax;
 #ifdef DEBUG
 		if (log_level >= 3) {
 			sock_log(f);
 			log_puts(": recording channels ");
-			log_putu(s->sub.dev_cmin);
+			log_putu(s->opt->rmin);
 			log_puts(":");
-			log_putu(s->sub.dev_cmax);
+			log_putu(s->opt->rmax);
 			log_puts(" -> ");
 			log_putu(s->sub.slot_cmin);
 			log_puts(":");
@@ -650,7 +649,6 @@ sock_setpar(struct sock *f)
 		else if (pchan > NCHAN_MAX)
 			pchan = NCHAN_MAX;
 		s->mix.slot_cmax = s->opt->pmin + pchan - 1;
-		s->mix.dev_cmax = s->opt->pmax;
 #ifdef DEBUG
 		if (log_level >= 3) {
 			sock_log(f);
@@ -659,9 +657,9 @@ sock_setpar(struct sock *f)
 			log_puts(":");
 			log_putu(s->mix.slot_cmax);
 			log_puts(" -> ");
-			log_putu(s->mix.dev_cmin);
+			log_putu(s->opt->pmin);
 			log_puts(":");
-			log_putu(s->mix.dev_cmax);
+			log_putu(s->opt->pmax);
 			log_puts("\n");
 		}
 #endif