diff --git a/res/sounds/README.md b/res/sounds/README.md
index 613fe7944..600c276f8 100644
--- a/res/sounds/README.md
+++ b/res/sounds/README.md
@@ -17,3 +17,49 @@ Constraints specific to Second Life®:
 
 License:
 * All sounds and binaries contributed to this repository are licensed under a [Creative Commons Attribution-ShareAlike 4.0 International Public License](https://creativecommons.org/licenses/by-sa/4.0/)
+
+
+## List new sounds
+When adding new sounds. Make noise normalization, that they sound same volume.
+
+Audacity / Effecs / Volume and compression / Loudness Normalization -14 LUFS
+Audacity / Effecs / Noise removal and repair / Noise reduction (optional)
+Audacity / Effecs / Volume and compression / Amplify (optional)
+Audacity / Effecs / Volume and compression / Limiter -1 (optional Show / Clipping in waveform)
+
+This work batch can be used to Youtube videos too. 
+Perfect video has following stats: Volume / Normalized 100% / 0 dB
+
+bell_brass_01.wav       9a1f0d2e-0f32-21f7-7d83-1aeb428ace4a
+bell_brass_02.wav       b6985bfd-72c0-5e19-5d83-88f6c9bbe151
+bell_cow_01.wav         5837c0d4-cdb5-21f5-8743-5801614383a8
+bell_cow_02.wav         86c7c7ec-1862-5328-f908-00d341e0a5d2
+bell_cow_03.wav         effb7813-18a3-7237-dcf0-873713e4a545
+bell_plastic_01.wav     f75aaed4-2415-d5a0-bd94-4bb32432b42f
+bell_plastic_02.wav     3c7ccb39-9ca8-d0ce-3561-cae901e7ad06
+bell_silver_01.wav      f8be56c4-28c8-3095-4b61-d425467eb2cb
+bell_silver_02.wav      e0b061c0-9edd-6a49-cdd6-a197ab439391
+bell_silver_03.wav      378e5546-955d-b04f-8994-c7b0763b8f68
+bell_supersoft_01.wav
+bell_supersoft_02.wav
+drop_808_0010.wav
+lock_015_01.wav
+lock_015_02.wav
+lock_015_03.wav
+lock_015_04.wav
+lock_015_05.wav
+lock_015_06.wav
+morse_ask.wav
+morse_do.wav
+morse_do_ao.wav
+morse_do_hud.wav
+
+## Old sounds
+ae3a836f-4d69-2b74-1d52-9c78a9106206 ---- Humming noise, should be bell
+503d2360-99f8-7a4a-8b89-43c5122927bd --- Little bling volume very low
+a3ff9ca6-8289-0007-5b6b-d4c993580a6b -- brass bell volume low
+843adc44-1189-2d67-6f3a-72a80b3a9ed4 -- cow bell
+4c84b9b7-b363-b501-c019-8eef5fb4d3c2 -- cow bell2
+3b95831e-8da5-597f-3b4d-713a03945cb6 -- tiny cat bell
+285b317c-23d1-de51-84bc-938eb3df9e46 -- tiny cat bell 2
+074b9b37-f6a3-a0a3-f40e-14bc57502435 -- xmas bell
diff --git a/src/collar/oc_bell.lsl b/src/collar/oc_bell.lsl
index b5a80dbd8..ccf4a080b 100644
--- a/src/collar/oc_bell.lsl
+++ b/src/collar/oc_bell.lsl
@@ -1,7 +1,7 @@
 // This file is part of OpenCollar.
-// Copyright (c) 2009 - 2016 Cleo Collins, Nandana Singh, Satomi Ahn,   
+// Copyright (c) 2009 - 2024 Cleo Collins, Nandana Singh, Satomi Ahn,   
 // Joy Stipe, Wendy Starfall, Medea Destiny, littlemousy,         
-// Romka Swallowtail, Garvin Twine et al.  
+// Romka Swallowtail, Garvin Twine et al. TrixAeo
 // Licensed under the GPLv2.  See LICENSE for full details. 
 
 
@@ -48,9 +48,25 @@ integer g_iBellShow=FALSE; // is the bell visible
 string g_sBellShow="SHOW"; //menu text of bell visible
 string g_sBellHide="HIDE"; //menu text of bell hidden
 
+// List of old sounds
 //list g_listBellSounds=["7b04c2ee-90d9-99b8-fd70-8e212a72f90d","b442e334-cb8a-c30e-bcd0-5923f2cb175a","1acaf624-1d91-a5d5-5eca-17a44945f8b0","5ef4a0e7-345f-d9d1-ae7f-70b316e73742","da186b64-db0a-bba6-8852-75805cb10008","d4110266-f923-596f-5885-aaf4d73ec8c0","5c6dd6bc-1675-c57e-0847-5144e5611ef9","1dc1e689-3fd8-13c5-b57f-3fedd06b827a"]; // list with legacy bell sounds
+// list g_listBellSounds=["ae3a836f-4d69-2b74-1d52-9c78a9106206","503d2360-99f8-7a4a-8b89-43c5122927bd","a3ff9ca6-8289-0007-5b6b-d4c993580a6b","843adc44-1189-2d67-6f3a-72a80b3a9ed4","4c84b9b7-b363-b501-c019-8eef5fb4d3c2","3b95831e-8da5-597f-3b4d-713a03945cb6","285b317c-23d1-de51-84bc-938eb3df9e46","074b9b37-f6a3-a0a3-f40e-14bc57502435"]; // list with 4.0 bell sounds
+
+// List of current sounds
+// bell_brass_01.wav       9a1f0d2e-0f32-21f7-7d83-1aeb428ace4a
+// bell_brass_02.wav       b6985bfd-72c0-5e19-5d83-88f6c9bbe151
+// bell_cow_01.wav         5837c0d4-cdb5-21f5-8743-5801614383a8
+// bell_cow_02.wav         86c7c7ec-1862-5328-f908-00d341e0a5d2
+// bell_cow_03.wav         effb7813-18a3-7237-dcf0-873713e4a545
+// bell_plastic_01.wav     f75aaed4-2415-d5a0-bd94-4bb32432b42f
+// bell_silver_01.wav      f8be56c4-28c8-3095-4b61-d425467eb2cb
+// bell_silver_02.wav      e0b061c0-9edd-6a49-cdd6-a197ab439391
+// bell_silver_03.wav      378e5546-955d-b04f-8994-c7b0763b8f68
+
+ list g_listBellSounds=["9a1f0d2e-0f32-21f7-7d83-1aeb428ace4a","b6985bfd-72c0-5e19-5d83-88f6c9bbe151","5837c0d4-cdb5-21f5-8743-5801614383a8",
+"86c7c7ec-1862-5328-f908-00d341e0a5d2", "effb7813-18a3-7237-dcf0-873713e4a545", "f75aaed4-2415-d5a0-bd94-4bb32432b42f", "f8be56c4-28c8-3095-4b61-d425467eb2cb",
+ "e0b061c0-9edd-6a49-cdd6-a197ab439391", "378e5546-955d-b04f-8994-c7b0763b8f68"];
 
-list g_listBellSounds=["ae3a836f-4d69-2b74-1d52-9c78a9106206","503d2360-99f8-7a4a-8b89-43c5122927bd","a3ff9ca6-8289-0007-5b6b-d4c993580a6b","843adc44-1189-2d67-6f3a-72a80b3a9ed4","4c84b9b7-b363-b501-c019-8eef5fb4d3c2","3b95831e-8da5-597f-3b4d-713a03945cb6","285b317c-23d1-de51-84bc-938eb3df9e46","074b9b37-f6a3-a0a3-f40e-14bc57502435"]; // list with 4.0 bell sounds
 key g_kCurrentBellSound; // curent bell sound key
 integer g_iCurrentBellSound; // curent bell sound sumber
 integer g_iBellSoundCount; // number of avail bell sounds