Low Speed Sound programming

Slawman

Slawman

Deckline
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Hi All,

I am experiencing an issue whereby my loco running sounds are truncating as the loco goes from slow to stop. I am experiencing this on both LGB factory fitted sound and Massoth XLS decoders (The LGB are most likely Massoth although I am not sure if Marklin continued using Massoth?).

Can anyone suggest which CVs i need to fiddle with?
 
No, I am running DCC. There is no loss of power to the locos ie. The lights stay on and standing sounds start.
 
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I am guessing you are analogue track power?

Motors will move from 2-3 Volts, but the decoder / sound electronics needs 5-6 Volts before it will work..
 
Or perhaps the drifting effect has kicked in, the real thing barely chuffs as it slows to a Station Stop.
 
There is a CV which governs what track voltage engine sounds start. On the Massoth XLS it is CV 194 called "Trigger threshold sound output digital operation" with a range from 0-255. On my Saxon 1K I had to adjust that the other way as it was still chuffing when the motor had stopped. Could that be it?
 
Thanks Dave, that sounds exactly like the CV I am looking for. The problem is the abrupt cut out of the sound so I will experiment with that.
 
Hi All, I have had a good play with a few CVs to no avail (including 194).

Here is a vid of the issue, pay close attention at the end, the video has not stopped (see the smoke) just the sound:

 
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Ah, I see...
It is the 'standing sounds' you are missing??

These are quite often on F5.. Give that a go.
 
Hi Phil, it is the abrupt stop of the sound that I would like to address. The standing sounds start quite fast after the sudden running sounds stop, maybe another second or so, I didn't video that much.

Is this normal for locos with sound? I may just have unrealistic expectations.
 
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It may be the lag between sound and vision on my PC, but if the loco wheels are not turning, then you won't get driving sounds. - It looks about right here..
 
I see what you mean. It could be "standing sounds" as PhilP PhilP suggests. Sometimes you can get the loco to issue a "steam hiss" when it comes to a halt depending on the sound decoder.
What is the decoder in this loco? I don't think we have established that yet.
Read CV 8, if it is 123 it is Massoth (or LGB rebadged), if it is 131 it is Trix/Maerklin.
If it is Massoth, what is CV 255 please (will give us type of decoder).
Assuming it is Massoth, what are the values for CV 2 and CV 194 (starting voltage and sound trigger threshold)?
Also what is the value for CV 149 (sound config), that will tell us if standing sounds are turned on or not.
Thanks, Dave
 
Hi Dave, Its a Massoth XLS I installed about 10 or so years ago.

CV 8=123
CV 255=148
CV 2=2
CV 194=1
CV 149=107

Thinking through this, I am really after the sound ramping down before it cuts out which probably contradicts the requirement for the running sounds to stop when the wheels stop turning.
 
You are if there is a chuff trigger in the equation..
You will loose most the chuff, as the loco coasts down.. You do get brake-squeal though.
 
Thanks for the CV readings.
CV 149 = 107 means standing sounds are on so it's not that.
And your sound threshold is lower than your starting voltage so it's not that either.
 
PhilP said:
It may be the lag between sound and vision on my PC, but if the loco wheels are not turning, then you won't get driving sounds. - It looks about right here..
Click to expand...
I think that when it stoped there was some hissing of Steam going on as Phil says sounds like it is ok. Another point after a minute or so (be patient) do you get any Coal Shoveling? A noise that really gets up my nose at times but it should be present.
 
The coal shovelling comes on quite fast. Maybe 10 seconds after the standing sounds commence. I have reduced the volume of those as they were disproportionately loud, makes it less up your nose.
 
I have been fiddling about with the speed profile and CV 67/68 and 69 seem to have a decent impact on the low speed running. This is allowing me to slow to a crawl, finish the braking sounds and then stop without it seeming to be a hard cut in the sound. I moved CV67 from 8 to 2, CV68 from 16 to 5 and CV69 from 32 to 15....

Is there any software which provides a simple GUI for CV programming ie, set a speed curve graphically and then the software will program the CV?
 
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