diff --git a/sndiod/dev.c b/sndiod/dev.c
index 0532dfa..6f8fa83 100644
--- a/sndiod/dev.c
+++ b/sndiod/dev.c
@@ -634,8 +634,8 @@ dev_mix_adjvol(struct dev *d)
 			for (j = d->slot_list; j != NULL; j = j->next) {
 				if (!(j->mode & MODE_PLAY))
 					continue;
-				if (i->mix.slot_cmin <= j->mix.slot_cmax &&
-				    i->mix.slot_cmax >= j->mix.slot_cmin)
+				if (i->opt->pmin <= j->mix.slot_cmax &&
+				    i->mix.slot_cmax >= j->opt->pmin)
 					n++;
 			}
 			weight /= n;
@@ -1422,10 +1422,10 @@ slot_allocbufs(struct slot *s)
 
 	if (s->mode & MODE_PLAY) {
 		s->mix.bpf = s->par.bps *
-		    (s->mix.slot_cmax - s->mix.slot_cmin + 1);
+		    (s->mix.slot_cmax - s->opt->pmin + 1);
 		abuf_init(&s->mix.buf, s->appbufsz * s->mix.bpf);
 
-		slot_nch = s->mix.slot_cmax - s->mix.slot_cmin + 1;
+		slot_nch = s->mix.slot_cmax - s->opt->pmin + 1;
 		dev_nch = s->opt->pmax - s->opt->pmin + 1;
 		s->mix.decbuf = NULL;
 		s->mix.resampbuf = NULL;
@@ -1438,8 +1438,8 @@ slot_allocbufs(struct slot *s)
 				s->mix.join = slot_nch / dev_nch;
 		}
 		cmap_init(&s->mix.cmap,
-		    s->mix.slot_cmin, s->mix.slot_cmax,
-		    s->mix.slot_cmin, s->mix.slot_cmax,
+		    s->opt->pmin, s->mix.slot_cmax,
+		    s->opt->pmin, s->mix.slot_cmax,
 		    0, d->pchan - 1,
 		    s->opt->pmin, s->opt->pmax);
 		if (!aparams_native(&s->par)) {
@@ -1457,10 +1457,10 @@ slot_allocbufs(struct slot *s)
 
 	if (s->mode & MODE_RECMASK) {
 		s->sub.bpf = s->par.bps *
-		    (s->sub.slot_cmax - s->sub.slot_cmin + 1);
+		    (s->sub.slot_cmax - s->opt->rmin + 1);
 		abuf_init(&s->sub.buf, s->appbufsz * s->sub.bpf);
 
-		slot_nch = s->sub.slot_cmax - s->sub.slot_cmin + 1;
+		slot_nch = s->sub.slot_cmax - s->opt->rmin + 1;
 		dev_nch = s->opt->rmax - s->opt->rmin + 1;
 		s->sub.encbuf = NULL;
 		s->sub.resampbuf = NULL;
@@ -1475,8 +1475,8 @@ slot_allocbufs(struct slot *s)
 		cmap_init(&s->sub.cmap,
 		    0, ((s->mode & MODE_MON) ? d->pchan : d->rchan) - 1,
 		    s->opt->rmin, s->opt->rmax,
-		    s->sub.slot_cmin, s->sub.slot_cmax,
-		    s->sub.slot_cmin, s->sub.slot_cmax);
+		    s->opt->rmin, s->sub.slot_cmax,
+		    s->opt->rmin, s->sub.slot_cmax);
 		if (s->rate != d->rate) {
 			resamp_init(&s->sub.resamp, d->round, s->round,
 			    slot_nch);
@@ -1670,14 +1670,10 @@ found:
 	s->pstate = SLOT_INIT;
 	s->mode = mode;
 	aparams_init(&s->par);
-	if (s->mode & MODE_PLAY) {
-		s->mix.slot_cmin = s->opt->pmin;
+	if (s->mode & MODE_PLAY)
 		s->mix.slot_cmax = s->opt->pmax;
-	}
-	if (s->mode & MODE_RECMASK) {
-		s->sub.slot_cmin = s->opt->rmin;
+	if (s->mode & MODE_RECMASK)
 		s->sub.slot_cmax = s->opt->rmax;
-	}
 	if (s->opt->mmc) {
 		s->xrun = XRUN_SYNC;
 		s->tstate = MMC_STOP;
diff --git a/sndiod/dev.h b/sndiod/dev.h
index fd9f23f..361e446 100644
--- a/sndiod/dev.h
+++ b/sndiod/dev.h
@@ -47,7 +47,7 @@ struct slot {
 		unsigned int vol;		/* volume within the vol */
 		struct abuf buf;		/* socket side buffer */
 		int bpf;			/* byte per frame */
-		int slot_cmin, slot_cmax;	/* slot source chans */
+		int slot_cmax;			/* slot source chans */
 		struct cmap cmap;		/* channel mapper state */
 		struct resamp resamp;		/* resampler state */
 		struct conv dec;		/* format decoder params */
@@ -59,7 +59,7 @@ struct slot {
 		struct abuf buf;		/* socket side buffer */
 		int prime;			/* initial cycles to skip */
 		int bpf;			/* byte per frame */
-		int slot_cmin, slot_cmax;	/* slot destination chans */
+		int slot_cmax;			/* slot destination 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 2b6f7de..82f7f64 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -636,7 +636,7 @@ sock_setpar(struct sock *f)
 			log_puts(":");
 			log_putu(s->opt->rmax);
 			log_puts(" -> ");
-			log_putu(s->sub.slot_cmin);
+			log_putu(s->opt->rmin);
 			log_puts(":");
 			log_putu(s->sub.slot_cmax);
 			log_puts("\n");
@@ -653,7 +653,7 @@ sock_setpar(struct sock *f)
 		if (log_level >= 3) {
 			sock_log(f);
 			log_puts(": playback channels ");
-			log_putu(s->mix.slot_cmin);
+			log_putu(s->opt->pmin);
 			log_puts(":");
 			log_putu(s->mix.slot_cmax);
 			log_puts(" -> ");
@@ -1011,13 +1011,13 @@ sock_execmsg(struct sock *f)
 			aparams_log(&s->par);
 			if (s->mode & MODE_PLAY) {
 				log_puts(", play ");
-				log_puti(s->mix.slot_cmin);
+				log_puti(s->opt->pmin);
 				log_puts(":");
 				log_puti(s->mix.slot_cmax);
 			}
 			if (s->mode & MODE_RECMASK) {
 				log_puts(", rec ");
-				log_puti(s->sub.slot_cmin);
+				log_puti(s->opt->rmin);
 				log_puts(":");
 				log_puti(s->sub.slot_cmax);
 			}
@@ -1124,11 +1124,11 @@ sock_execmsg(struct sock *f)
 		m->u.par.msb = s->par.msb;
 		if (s->mode & MODE_PLAY) {
 			m->u.par.pchan = htons(s->mix.slot_cmax -
-			    s->mix.slot_cmin + 1);
+			    s->opt->pmin + 1);
 		}
 		if (s->mode & MODE_RECMASK) {
 			m->u.par.rchan = htons(s->sub.slot_cmax -
-			    s->sub.slot_cmin + 1);
+			    s->opt->rmin + 1);
 		}
 		m->u.par.rate = htonl(s->rate);
 		m->u.par.appbufsz = htonl(s->appbufsz);