The bug
Respawn anchors do not produce ambient sound, although a sound file for it exists (sound id minecraft:block.respawn_anchor.ambient)
To reproduce
Place a respawn anchor.
Charge it with glowstone.
Wait.
Expected result
The respawn anchor would produce its ambient sound.
Observed result
The respawn anchor does not produce its ambient sound.
Code analysis
Code analysis by @unknown can be found in this comment.
Linked issues
relates to 2
Comments 10
I was just analyzing the code used to play the ambience sound for the respawn anchors, and I think I've found the issue. Using official Mojang mappings on 1.17.1, within the animateTick method of the RespawnAnchorBlock class, the playSound method is used to play the anchor's ambient sounds. The playSound method works on the server's end by getting the server to tell its clients to play the sound appropriately - when run by itself on a client, the sound isn't played. Meanwhile, the animateTick function is only run on client's end because it deals with cosmetic updates such as particle effects and animations. Since playSound, a server-side-only method, is being used within animateTick, a client-side-only method, the sound fails to play. The Nether Portal block's code (NetherPortalBlock) plays its ambience correctly; it uses playLocalSound instead, which is meant to run on the client-side.
TL;DR: The code for playing the respawn anchor's ambient sounds uses a server-side method within a method that only runs on clients, which causes it to not work.
Fantastime
"Ambient Sound"?