diff --git a/src/stream/stream_member.c b/src/stream/stream_member.c
index 0f36f785..5d042a18 100644
--- a/src/stream/stream_member.c
+++ b/src/stream/stream_member.c
@@ -55,16 +55,18 @@ static int member_option(const char *key, const char *value, void *arg) {
         parse->seen |= 1;
         if (!value[0]) return 0;
         const char *p = value;
-        unsigned n, r, size;
+        unsigned n, r, size, audio;
         if (member_hex(&p, &parse->state.source.source_epoch) != STREAM_OK || *p++ != ':'
             || member_decimal(&p, 255, &n) != STREAM_OK || *p++ != ':'
             || member_decimal(&p, 254, &r) != STREAM_OK || *p++ != ':'
-            || member_decimal(&p, RS_MAX_BLOCK_SIZE, &size) != STREAM_OK || *p) return -1;
+            || member_decimal(&p, RS_MAX_BLOCK_SIZE, &size) != STREAM_OK || *p++ != ':'
+            || member_decimal(&p, 1, &audio) != STREAM_OK || *p) return -1;
         parse->state.source.n = (uint8_t)n;
         parse->state.source.r = (uint8_t)r;
         parse->state.source.block_size = (uint16_t)size;
         if (stream_descriptor_validate(&parse->state.source) != STREAM_OK) return -1;
         parse->state.published = 1;
+        parse->state.audio_enabled = (int)audio;
     } else if (!strcmp(key, STREAM_MEMBER_SUBSCRIPTIONS)) {
         if (parse->seen & 2) return -1;
         parse->seen |= 2;
@@ -118,13 +120,14 @@ int stream_member_parse(uint64_t group_id, uint64_t member_id, const char *useri
 int stream_member_format(const struct stream_member_state *state, char source[MS_USERINFO_MAX + 1],
                          char subscriptions[MS_USERINFO_MAX + 1]) {
     if (!state || !source || !subscriptions || state->count > STREAM_MEMBER_MAX_SUBSCRIPTIONS
+        || (state->audio_enabled != 0 && state->audio_enabled != 1) || (!state->published && state->audio_enabled)
         || (state->published && (stream_descriptor_validate(&state->source) != STREAM_OK
             || !stream_member_has_subscription(state, state->source.source_node_id, state->source.source_epoch)))) {
         DEBUG_ERROR(DEBUG_CATEGORY_STREAM, "member format invalid state"); return STREAM_ERR_ARGUMENT;
     }
     char encoded_source[MS_USERINFO_MAX + 1] = "", encoded_subscriptions[MS_USERINFO_MAX + 1] = "";
-    if (state->published) snprintf(encoded_source, sizeof(encoded_source), "%016llx:%u:%u:%u",
-        (unsigned long long)state->source.source_epoch, state->source.n, state->source.r, state->source.block_size);
+    if (state->published) snprintf(encoded_source, sizeof(encoded_source), "%016llx:%u:%u:%u:%d",
+        (unsigned long long)state->source.source_epoch, state->source.n, state->source.r, state->source.block_size, state->audio_enabled);
     size_t used = 0;
     for (size_t i = 0; i < state->count; i++) {
         const struct stream_subscription_key *entry = &state->subscriptions[i];
diff --git a/src/stream/stream_member.h b/src/stream/stream_member.h
index 11fa8fa1..b13816ba 100644
--- a/src/stream/stream_member.h
+++ b/src/stream/stream_member.h
@@ -1,5 +1,5 @@
 /* Строковые опции подписанного блока мембера, без отдельного протокола объявлений.
- * stream_source = epoch(16 hex):n:r:max-RS-size; отсутствие/пустое значение — не публикует.
+ * stream_source = epoch(16 hex):n:r:max-RS-size:audio(0/1); отсутствие/пустое значение — не публикует.
  * stream_subscriptions = source(16 hex):epoch(16 hex)[:r],...; :r — только помощь, без локального зрителя.
  * Указанная в stream_source собственная трансляция также должна быть в subscriptions.
  * load проверяет подпись профиля и принадлежность ключа источника, BGP-доступность — отдельно.
@@ -32,6 +32,7 @@ struct stream_member_state {
     size_t count;
     uint64_t version;
     int published;
+    int audio_enabled;
 };
 
 int stream_member_parse(uint64_t group_id, uint64_t member_id, const char *userinfo, struct stream_member_state *state);