The 'playable' whistle function is in the 'throttle'. The DT400 is the only Digitrax throttle that I am aware has the feature. The 'built-in' throttle in your 'Zephyr' base unit is not capable of this function.
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin
How do I set up the playable whistle feature on Digitrax's DCS-50? I can't find it in the manuals.
- Luke
Modeling the Southern Pacific in the 1960's-1980's