ZIMO also have a sound project for the Meiningen loco. Here is the documentation (in German), but I am sure you all know how to deal with that :- Fireless Loco Bauart Meiningen
The sound project is encoded and you need to buy a code from the author (Matthias Henning), after downloading the sound project. He will need the Id of the ZIMO decoder you plan to use. This 4 digit Decoder Id is in CV #250 to #253, where each digit can be 0 to 255. After payment, you will get back a code which is also 4 digits, like the Decoder ID, and has to be written to CV #260 to #263 to activate (decode) the sound project. This is an easy way for authors to collect a modest fee (€12, I think) for the work creating the ZIMO sound project. His website is all in German, so I recommend you just email him and state the requirements. He will need the Decoder Id and the name of the Sound Project.
To download the sound project, go to the ZIMO Sound Database and search in the page (CTRL + F) for Meiningen and you will find the project. Click on the Green plus signs (twice) to expand all the details and click on the Sound Project (ZSP00745). This will download a ZIMO sound file (ending in .zpp). You will need a ZIMO system or a MXULFA (Decoder Update Device) to upload this to a ZIMO sound decoder. If you are interested in buying this sound project, email Mathhias for the code. His email address is <info@modellbau-henning.de>.
Cheers
John Russell (ZIMO Partner)