Synchronizing steam chuff sound with wheel rotation

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  • Hannes44
    Senior Member
    • Nov 1999
    • 133
    • Austria.

    #1

    Synchronizing steam chuff sound with wheel rotation

    In the manual I found : Triggers from 121 to 136 are used to synchronize steam locomotive chuffs with wheel rotation. I'm not very versed with sms files but I'd like this synchronization to implement in my steamer. Is there somewhere an example file, so I can have some orientation how to do this ?
  • farrmp
    Member
    • Jan 2008
    • 42
    • San Diego, CA Area

    #2
    Search here in the TS.com File Library under MSTS Steam Locomotives for "Brandon Smith".

    Any of his recent .SMS files are a Model of 'How to do It'.

    Paul

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    • Hannes44
      Senior Member
      • Nov 1999
      • 133
      • Austria.

      #3
      Thanks for your answer, but none of the "Brandon Smith" locomotives I downloaded uses the OR specific method of synchronization in their sms sound files.

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      • csantucci
        Senior Member
        • Nov 1999
        • 856
        • Torino, Italy.

        #4
        If you have at least read access to the ET forum, have a look at a thread there starting from this post http://www.elvastower.com/forums/ind...ost__p__145149 .
        Last edited by csantucci; 09-08-2017, 05:13.
        sigpic

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        • Hannes44
          Senior Member
          • Nov 1999
          • 133
          • Austria.

          #5
          Thank you, I knew about that thread and I tried it going from there but I got difficulties in changing the longer chuff for lower speeds with short chuffs for higher speeds, so I am looking for a working example.

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          • Hannes44
            Senior Member
            • Nov 1999
            • 133
            • Austria.

            #6
            The fact that the ET thread is quite old and there are no other threads concerning synchronized steamer sounds + my own measly experiments let me conclude that there is no real interest for this problem, maybe it is not possible to implement it satisfactorily with the MSTS sound system still in full force.
            I think Kuju had plans for synchronizing, because in the Scotsman sound folder there are a lot of very short chuffing *.wav files, which are not used anywhere in the sms files as far as I can see; maybe they dropped those plans, too as too complicated....

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            • csantucci
              Senior Member
              • Nov 1999
              • 856
              • Torino, Italy.

              #7
              I believe quite good results can be achieved at low speeds, while for higher speeds the traditional way of doing things provides better results. However creating a sample for this requires some time to expert .sms developers, and there are very few of them.
              sigpic

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              • Hannes44
                Senior Member
                • Nov 1999
                • 133
                • Austria.

                #8
                ...and it sounds at low speeds better only for big locomotives but not so good for small "thinner" sound of e.g. narrow gauge engines.

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                • midneguy
                  Member
                  • Jul 2011
                  • 65

                  #9
                  I tinkered with this quite a bit when it was first introduced, and my final "findings" are posted in the last message on the Elvastower thread previously mentioned. Personally, I was never totally satisfied with the implementation of this for the reasons stated - the main one being the timing of the "chugs" appeared to be impacted by the varying processing load on the sim. That is, higher processing demands such as can be as evidenced by lower vs. higher frame rates, seemed to impact the timing of the playing of the "chugs" and resulting in a fair amount of variation. This is the biggest problem in my mind, since the chugs are "mechanical" - that is, their timing must remain consistent regardless of any other factors to remain convincing. To me, it is absolutely necessary to meet this requirement before further development of .sms techniques that utilize the individual "chug" triggers is warranted.

                  Because of this, I've stayed with my original .sms designs, which are all based on Brandon Smith's work.

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