Intermittent choo-choo on steam engine and intermittent clickity clack on m.u. set??

Check to make sure the "Doppler" function is not active.

check to make sure that the clickity clack is not on!

If on, it turns on above a certain speed so see if the engine runs good at say 15MPH.

If it only happens above like 40 MPH and turns off whenever you move the throttle a bit, it's the clickity clack. You should hear it emanating from the speaker.

No clickity clack on this steam engine, just intermittent choo-choo sounds.

However, on an four car mu set the clickity clack does the same thing, intermittent sounds every 40 feet or so.

Both the mu car set and the steam engine run very well through out their speed range.

I only have Z-1000 capability. Is there a way to address these two situations with a Z-1000?

Thank you for your comments.