This mod provides the following new effects:

A direct current motor sound useful for older metros and other electric commuter rail. Three different samples are crossfaded across different speed intervals.
Also includes a braking sound.The number indicates the max speed (km/h) of the vehicle at which an idling sound will faded in. Ideally to be used with acceleration = 0.2 and braking = 0.2.

Same as above, but the train will use dynamic braking until short before stopping, when you will hear a mechanical braking sound. This means most braking is done using the traction motors as generators, whose voltage is applied to braking resistors or the line - i.e. you will hear the motors slow down under load while the train decelerates.

A DC motor effect specifically tuned for Sprague-Thomson and emitting typical airstroke sounds during braking.

Valid speeds: 80,90,100,120,140,160, 200 e.g "Turbo Diesel Train Movement 100"
A load-dependent diesel engine sound with turbo charger. Number indicates the max speed in km/h. Engine rpm will be increased in steps according to the train driver choosing higher notches of engine power. The turbo follows engine rpm with some delay and smoothly, replicating the turbine adjusting its rpm to the exhaust stream slowly.
Also includes a braking sound.
Based on recordings of DB class 218 with TB11 engine. The 200 km/h version has pitch ajusted higher to be suitable for British HST euipped with with Paxman Valenta.
Ideally to be used with acceleration=0.2 and braking=0.2.

Same as above, but without turbo charger sound.

Idle sound played while the vehicle is stopped, to be used with "Turbo Diesel Train Movement".
Idle RPM will be increased with lower environment temperatures to keep passengers from freezing. No flags required.

Same as above but without turbo, to be used with "Diesel Train Movement".

A disc braking sound for trailers. Pitch and volume slightly increase towards the end end of the braking process. Perfectly sufficient to add this effect only to one or two cars of a train.

A (wheel) flange grinding sound depending on speed and track curvature.
Perfectly sufficient to add this effect only to one or two cars of a train.

A flage squealing sound. Computed like "Train Flange Grinding" wherewith it can be combined nicely.

Experimental rear light effect using shorter light cones coloured red. As for headlights, you should apply the "reversed" flag where necessary.
Please note, that for backwards compatibility, most vehicles still have headlights illuminated via lightmap. Maybe I will change that in the future, but imho it looks acceptable.

Three randomly triggered variations of door closing sounds, should be used with required flag "leaving". So far, this works only on the engine, since "leaving" flag gets only set there.

A bell sound usually signaling "ready for departure". Should be used with "leaving" flag. Timed to be emitted after "Train Close Doors".

A compressed air driven whistle good for many non-steam vehicles (if they don't have a horn instead).

If anything is still unclear, please take a look at the vehicle definitions coming with my vehicles.