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Sound slots, indexed cv’s confusion

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  • Member since
    February 2002
  • From: Reading, PA
  • 28,934 posts
Posted by rrinker on Wednesday, June 5, 2019 3:02 PM

 Sounds slots are the "tracks" - like a record. Sound slot 1 might be the prime mover, sound slot 2 might be the horn, sound slot 3 the bell, sound slot 4 the dynamic brake, etc. Mainly this is only a concern if developing your own sound projects - and frankly I have neither the time, the equipment, or the access to real trains to do such a thing.

Indexed CVs are exactly as you say. The index allows one CV, in your example CV 275, to do more than one thing (because if every setting had its own CV, there's be over 4000 CVs, and most DCC systems can't access something like CV3042. SO you set the index CVs to the values specified, and then set the actual CV. 

It's kind of like having a bunch of drawers, each with a number (you are in drawer 275). Inside drawer 275, there are those dividers like in those little tackle boxes everyone uses to store small parts. The index CVs tell you which of those little cubbies you are putting something. So drawer 275 might have 20 sections, the index tells you which particular section you are accessing.

                                                  --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    February 2019
  • 28 posts
Sound slots, indexed cv’s confusion
Posted by Davidarps on Wednesday, June 5, 2019 9:29 AM

I’m just an average guy with an average brain. Not a technical engineer by any means. But these sound slots and volume cv’s with a ESU LokSound 5 decoder really has me frustrated. What is a sound slot and how do you use it? To change sound volumes you have to enter “index” cv 31 to 16 and “index” cv 32 to 1. Does that mean to just enter the regular number 31 with a value of 16 and the same with cv 32? And then enter the cv 275 and then the value? All this is after I find sound slot 3 wherever that is.

Sorry for the rambling on but I’m a 73 year old guy just trying have fun with my trains

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