Squealing Breaks

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Squealing Breaks - How to setup the CV's

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Drongo		#1 Posted : 08 August 2025 08:37:22(UTC) Retweet
Joined: 03/06/2008(UTC) Posts: 1,260 Location: Sydney, NSW		Hi Everyone, I've tried to search for this information on this forum and on YouTube without much success. On YouTube I've found a lot of information about car breaks squealing but this is not what I want. Can someone please explain how to setup the CV's to get the locomotives, with this feature, to work. Regards Greg
		Take it easy . . . . or any other way you can get it !!!!

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JohnjeanB		#2 Posted : 08 August 2025 10:19:40(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,601 Location: Paris, France		Hi Greg First the official Märklin video (alas in German) about the brake sound ("Bremsenquietchen") parameters on mSD3 decoders, using a CS3 Here is a technical paper on the same subject by Märklin https://www.maerklin.de/fileadmi..._-_Bremsenquietschen.pdf Among these: - CV64 Bremsschwelle: the speed value to be reached before any sound brake can be heard when setting the speed to zero - CV164 Bandbreite: The higher value, the earlier the sound will be triggered - CV 163 Auslaufkorrectur To adjust the brake sound so that it stops when the loco stops Additional adjustment value parameters - CV 4 Bremsverzögerung (BV) Inertia simulation. The highter, the longer it takes to come to a stop - CV 63 Lautstärke: general sound volume (impacts all sounds The whole list of CVs by Märklin decoders is here https://www.maerklin.de/fileadmi...mLD-mSD_CV-Liste_DCC.pdf I hope this helps. Sorry for the German but often, translations are bizarre Cheers Jean
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Drongo		#3 Posted : 08 August 2025 13:52:52(UTC) Retweet
Joined: 03/06/2008(UTC) Posts: 1,260 Location: Sydney, NSW		Thank you very much Jean for the information. Now all I need to do is run it through Google translate. Regards Greg
		Take it easy . . . . or any other way you can get it !!!!

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rhfil		#4 Posted : 09 August 2025 16:38:00(UTC) Retweet
Joined: 05/09/2014(UTC) Posts: 701 Location: NEW HAMPSHIRE, Somersworth		One factor which is not mentioned is the amount of deceleration needed to activate the squeal. The best bet is to experiment with the locomotive you want to use the feature. Run the loco the way you will normally and then adjust the braking delay to what seems natural and the squeal to match.

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marklinist5999		#5 Posted : 09 August 2025 17:44:55(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,994 Location: Michigan, Troy		The Loco must be going fast enough also. The brake squeal threshold can be improved upon often by adjusting the brake threshold in the decoder setup menu macro.


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