diff --git a/src/httpd_dacp.c b/src/httpd_dacp.c
index 9cec68b8..8680f32d 100644
--- a/src/httpd_dacp.c
+++ b/src/httpd_dacp.c
@@ -510,34 +510,34 @@ playqueuecontents_add_queue_item(struct evbuffer *songlist, struct db_queue_item
 }
 
 static void
-speaker_enum_cb(uint64_t id, const char *name, const char *output_type, int relvol, int absvol, struct spk_flags flags, void *arg)
+speaker_enum_cb(struct spk_info *spk, void *arg)
 {
   struct evbuffer *evbuf;
   int len;
 
   evbuf = (struct evbuffer *)arg;
 
-  len = 8 + strlen(name) + 28;
-  if (flags.selected)
+  len = 8 + strlen(spk->name) + 28;
+  if (spk->selected)
     len += 9;
-  if (flags.has_password)
+  if (spk->has_password)
     len += 9;
-  if (flags.has_video)
+  if (spk->has_video)
     len += 9;
 
   CHECK_ERR(L_DACP, evbuffer_expand(evbuf, 71 + len));
 
-  dmap_add_container(evbuf, "mdcl", len); /* 8 + len */
-  if (flags.selected)
-    dmap_add_char(evbuf, "caia", 1);      /* 9 */
-  if (flags.has_password)
-    dmap_add_char(evbuf, "cahp", 1);      /* 9 */
-  if (flags.has_video)
-    dmap_add_char(evbuf, "caiv", 1);      /* 9 */
-  dmap_add_string(evbuf, "minm", name);   /* 8 + len */
-  dmap_add_long(evbuf, "msma", id);       /* 16 */
+  dmap_add_container(evbuf, "mdcl", len);        /* 8 + len */
+  if (spk->selected)
+    dmap_add_char(evbuf, "caia", 1);             /* 9 */
+  if (spk->has_password)
+    dmap_add_char(evbuf, "cahp", 1);             /* 9 */
+  if (spk->has_video)
+    dmap_add_char(evbuf, "caiv", 1);             /* 9 */
+  dmap_add_string(evbuf, "minm", spk->name);   /* 8 + len */
+  dmap_add_long(evbuf, "msma", spk->id);       /* 16 */
 
-  dmap_add_int(evbuf, "cmvo", relvol);    /* 12 */
+  dmap_add_int(evbuf, "cmvo", spk->relvol);    /* 12 */
 }
 
 static int
diff --git a/src/httpd_jsonapi.c b/src/httpd_jsonapi.c
index b39ae298..f98830b7 100644
--- a/src/httpd_jsonapi.c
+++ b/src/httpd_jsonapi.c
@@ -495,7 +495,7 @@ jsonapi_reply_lastfm_logout(struct httpd_request *hreq)
 }
 
 static void
-speaker_enum_cb(uint64_t id, const char *name, const char *output_type, int relvol, int absvol, struct spk_flags flags, void *arg)
+speaker_enum_cb(struct spk_info *spk, void *arg)
 {
   json_object *outputs;
   json_object *output;
@@ -504,15 +504,15 @@ speaker_enum_cb(uint64_t id, const char *name, const char *output_type, int relv
   outputs = arg;
   output = json_object_new_object();
 
-  snprintf(output_id, sizeof(output_id), "%" PRIu64, id);
+  snprintf(output_id, sizeof(output_id), "%" PRIu64, spk->id);
   json_object_object_add(output, "id", json_object_new_string(output_id));
-  json_object_object_add(output, "name", json_object_new_string(name));
-  json_object_object_add(output, "type", json_object_new_string(output_type));
-  json_object_object_add(output, "selected", json_object_new_boolean(flags.selected));
-  json_object_object_add(output, "has_password", json_object_new_boolean(flags.has_password));
-  json_object_object_add(output, "requires_auth", json_object_new_boolean(flags.requires_auth));
-  json_object_object_add(output, "needs_auth_key", json_object_new_boolean(flags.needs_auth_key));
-  json_object_object_add(output, "volume", json_object_new_int(absvol));
+  json_object_object_add(output, "name", json_object_new_string(spk->name));
+  json_object_object_add(output, "type", json_object_new_string(spk->output_type));
+  json_object_object_add(output, "selected", json_object_new_boolean(spk->selected));
+  json_object_object_add(output, "has_password", json_object_new_boolean(spk->has_password));
+  json_object_object_add(output, "requires_auth", json_object_new_boolean(spk->requires_auth));
+  json_object_object_add(output, "needs_auth_key", json_object_new_boolean(spk->needs_auth_key));
+  json_object_object_add(output, "volume", json_object_new_int(spk->absvol));
 
   json_object_array_add(outputs, output);
 }
diff --git a/src/mpd.c b/src/mpd.c
index bf46df55..4754a57a 100644
--- a/src/mpd.c
+++ b/src/mpd.c
@@ -3571,10 +3571,11 @@ mpd_command_password(struct evbuffer *evbuf, int argc, char **argv, char **errms
 
 /*
  * Callback function for the 'player_speaker_enumerate' function.
- * Adds a new struct output to the given struct outputs in *arg for the given speaker (id, name, etc.).
+ * Expect a struct output_get_param as argument and allocates a struct output if
+ * the shortid of output_get_param matches the given speaker/output spk.
  */
 static void
-outputs_enum_cb(uint64_t id, const char *name, const char *output_type, int relvol, int absvol, struct spk_flags flags, void *arg)
+outputs_enum_cb(struct spk_info *spk, void *arg)
 {
   struct outputs *outputs;
   struct output *output;
@@ -3583,15 +3584,15 @@ outputs_enum_cb(uint64_t id, const char *name, const char *output_type, int relv
 
   output = (struct output*)malloc(sizeof(struct output));
 
-  output->id = id;
-  output->shortid = (unsigned short) id;
-  output->name = strdup(name);
-  output->selected = flags.selected;
+  output->id = spk->id;
+  output->shortid = (unsigned short) spk->id;
+  output->name = strdup(spk->name);
+  output->selected = spk->selected;
 
   output->next = outputs->outputs;
   outputs->outputs = output;
   outputs->count++;
-  if (flags.selected)
+  if (spk->selected)
     outputs->active++;
 
   DPRINTF(E_DBG, L_MPD, "Output enum: shortid %d, id %" PRIu64 ", name '%s', selected %d\n",
@@ -3869,7 +3870,7 @@ mpd_command_toggleoutput(struct evbuffer *evbuf, int argc, char **argv, char **e
  *   outputvolume: 50
  */
 static void
-speaker_enum_cb(uint64_t id, const char *name, const char *output_type, int relvol, int absvol, struct spk_flags flags, void *arg)
+speaker_enum_cb(struct spk_info *spk, void *arg)
 {
   struct evbuffer *evbuf;
 
@@ -3880,10 +3881,10 @@ speaker_enum_cb(uint64_t id, const char *name, const char *output_type, int relv
 		      "outputname: %s\n"
 		      "outputenabled: %d\n"
 		      "outputvolume: %d\n",
-		      (unsigned short) id,
-		      name,
-		      flags.selected,
-		      absvol);
+		      (unsigned short) spk->id,
+		      spk->name,
+		      spk->selected,
+		      spk->absvol);
 }
 
 /*
diff --git a/src/player.c b/src/player.c
index 8f0f60b2..efb1b158 100644
--- a/src/player.c
+++ b/src/player.c
@@ -2384,27 +2384,25 @@ speaker_enumerate(void *arg, int *retval)
 {
   struct spk_enum *spk_enum = arg;
   struct output_device *device;
-  struct spk_flags flags;
-
-#ifdef DEBUG_RELVOL
-  DPRINTF(E_DBG, L_PLAYER, "*** master: %d\n", master_volume);
-#endif
+  struct spk_info spk;
 
   for (device = dev_list; device; device = device->next)
     {
       if (device->advertised || device->selected)
 	{
-	  flags.selected = device->selected;
-	  flags.has_password = device->has_password;
-	  flags.has_video = device->has_video;
-	  flags.requires_auth = device->requires_auth;
-	  flags.needs_auth_key = (device->requires_auth && device->auth_key == NULL);
+	  spk.id = device->id;
+	  spk.name = device->name;
+	  spk.output_type = device->type_name;
+	  spk.relvol = device->relvol;
+	  spk.absvol = device->volume;
 
-	  spk_enum->cb(device->id, device->name, device->type_name, device->relvol, device->volume, flags, spk_enum->arg);
+	  spk.selected = device->selected;
+	  spk.has_password = device->has_password;
+	  spk.has_video = device->has_video;
+	  spk.requires_auth = device->requires_auth;
+	  spk.needs_auth_key = (device->requires_auth && device->auth_key == NULL);
 
-#ifdef DEBUG_RELVOL
-	  DPRINTF(E_DBG, L_PLAYER, "*** %s: abs %d rel %d\n", device->name, device->volume, device->relvol);
-#endif
+	  spk_enum->cb(&spk, spk_enum->arg);
 	}
     }
 
diff --git a/src/player.h b/src/player.h
index 26fe51d1..7f52d2c6 100644
--- a/src/player.h
+++ b/src/player.h
@@ -2,6 +2,7 @@
 #ifndef __PLAYER_H__
 #define __PLAYER_H__
 
+#include <stdbool.h>
 #include <stdint.h>
 
 #include "db.h"
@@ -28,13 +29,19 @@ enum repeat_mode {
   REPEAT_ALL  = 2,
 };
 
-struct spk_flags {
-  unsigned selected:1;
-  unsigned has_password:1;
-  unsigned requires_auth:1;
-  unsigned needs_auth_key:1;
+struct spk_info {
+  uint64_t id;
+  const char *name;
+  const char *output_type;
+  int relvol;
+  int absvol;
 
-  unsigned has_video:1;
+  bool selected;
+  bool has_password;
+  bool requires_auth;
+  bool needs_auth_key;
+
+  bool has_video;
 };
 
 struct player_status {
@@ -57,7 +64,7 @@ struct player_status {
   uint32_t len_ms;
 };
 
-typedef void (*spk_enum_cb)(uint64_t id, const char *name, const char *output_type, int relvol, int absvol, struct spk_flags flags, void *arg);
+typedef void (*spk_enum_cb)(struct spk_info *spk, void *arg);
 
 struct player_history
 {