Hi all

I have a hornby Britannia weathered and name changed which has been fitted with dcc sound. The sound is very low and I have set the vol to max(cv64 at 68). The sounds are excellent but just too low. On examining the tender I cant see any way for the sound to escape(No holes etc). Anyone have any advice. Also I have a bachmann dynamis so I cant read values but I can set/change them. How do you do delayed accel and decel and how do you limit the top speed? Sorry but I am new to all this.

Regards Steve

If the sound can't get out no wonder you can't hear anything. Try running it with the tender body off - if that is much louder then the answer is a few strategically placed holes in the chassis. If it ISN'T louder then the problem lies with the decoder or its installation.

The CV's that you need to play with are:

CV 2 - start speed - (0 to 255) set this so the loco starts to crawl at your lowest throttle setting

CV 3 - acceleration momentum - (0 to 255) controls how long it takes to get up to speed

CV 4 - deceleration momentum - (0 to 255) controls how long it takes to stop

CV 5 - top speed - (0 to 255) set this so that the loco has a realistic top speed at your highest throttle setting

 

Sound decoders often respond differently to "normal" decoders as they have to allow time for the sounds to play which can result in a delay between doing something with the throttle and the locomotive responding.

A good explanation, Ian.  CV 6 can help as well, if you set it at about half CV 5 value as a starting place.  Don't be too worried if the decoder doesn't support every CV, Steve.  Just set the ones you can.

With regard to the speaker.  It's very important to separate the front of the cone from the back.  Some come with enclosures and they need to be kept air tight.  The ultimate installation has the front of the speaker exposed.  I've found that facing it down through the bogies or in the case of a steam loco, facing it forward into the loco cabin, works really well.

Sometimes it will work with it inside the body - often facing up towards the closed roof, but this is more likely to work with cavernous models, like railcars.  The main thing is, keep the enclosure sealed and aim for facing the front to the open air.

I hope that helps a bit. 

Assuming it is an ESU LokSound, the volume is adjusted with CV63, with a maximum value of 64.

Thanks for the advice my esteemed forum chums which has made it all the clearer. Saw the real thing in action this morning as I watch 70000 Britannia roar through Keynsham station on the Pompey Pacific. She is in all black livery at the moment. I will post a pic if they are ok.( Light bad)
Right then where's that Brit of mine?

Regards Steve.

Ian Morton sounds a familiar name to me in model railway circles?

Ah! Now I see why Ian. Just clicked on the link. Thanks again.