From 818494b02e4111e0f1d3d1d6c8335d6a4b8bde10 Mon Sep 17 00:00:00 2001
From: sunghee-hwang <97494915+sunghee-hwang@users.noreply.github.com>
Date: Thu, 23 Nov 2023 21:28:29 +0900
Subject: [PATCH] Fix #766, Duplicate values of audio_element_ids in one
 MixPresentation should be prohibited

---
 index.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.bs b/index.bs
index 2a60f573..8020d95c 100644
--- a/index.bs
+++ b/index.bs
@@ -1176,7 +1176,7 @@ class MixPresentationOBU() {
 
 <dfn noexport>num_sub_mixes</dfn> specifies the number of sub-mixes. It SHALL NOT be set to 0. 
 
-<dfn noexport>num_audio_elements</dfn> specifies the number of [=Audio Element=]s that are used in this [=Mix Presentation=] to generate the final output audio signal for playback. It SHALL NOT be set to 0. 
+<dfn noexport>num_audio_elements</dfn> specifies the number of [=Audio Element=]s that are used in each sub-mix of this [=Mix Presentation=] to generate the final output audio signal for playback. It SHALL NOT be set to 0. There SHALL be no duplicate values of [=audio_element_obu/audio_element_id=] within one [=Mix Presentation=].
 
 <dfn noexport for="mix_presentation_obu">audio_element_id</dfn> indicates the identifier for an [=Audio Element=] which this [=Mix Presentation=] refers to.