770/771 Čmeliak – 16bit General Project

Project version 6.1.1
770/771 Čmeliak – 16bit General Project
16bit

Sound sample

Project Information

  • General sound project suitable for custom modifications, especially individual light settings.
  • Designed for 16-bit ZIMO MS series sound decoders.
  • Recommended minimum decoder software version is 5.5.
  • The factory default address is 3.
  • Program CV8 = 8 to reset the decoder to the project defaults.

Function Assignment

Function mapping and CV settings can be modified.

  • F0 Position white lights
    Affected function output: FA0v, FA0r
    Direction dependent
  • F1 Light reserve
    Affected function output: FA1
  • F2 Light reserve
    Affected function output: FA2
  • F3 Shunting mode
    • speed range reduced to ½
    • reduces acceleration / braking times to ¼ of CV3 and CV4
    • triggers short horn at start
  • F4 Short horn
  • F5 Coasting
    Idle running sound regardless of set speed
  • F6 Engine acceleration to max RPM
    Independent of set speed, even when stationary
  • F7 Long horn
  • F8 Sound on/off
    Engine
  • F9 Unused
  • F10 Short whistle
  • F11 Long whistle
  • F12 Uncoupling screw down
  • F13 Uncoupling screw up
  • F14 Sanding
  • F15 Dispatcher whistle - new
    Call to readiness
  • F16 Dispatcher whistle - old
    Call to readiness, departure
  • F17 Compressor
  • F18 Switching sound sets
    Loaded / unloaded locomotive, when stationary
  • F19 Wheel squealing in curves
  • F20 Unused
  • F21 Unused
  • F22 Unused
  • F23 Unused
  • F24 Unused
  • F25 Unused
  • F26 Sound muting
  • F27 Volume decrease
  • F28 Volume increase

Setting Maximum Speed

We recommend setting the maximum speed via CV57 rather than CV5. Adjusting CV5 changes the sound range, while CV57 does not affect the acceleration (CV3) or braking (CV4) timings.

Shunting Mode

In the general project the marker lights are switched off in shunting mode. If you need them to illuminate together with the headlight, set CV37 = 3 (default CV37 = 0).

The mode halves the speed range and reduces acceleration and braking times to a quarter of the CV3/CV4 values. Disable it with CV124 = 16; complete deactivation of the timings is possible with CV124 = 19.

If you do not want to use shunting mode at all, set CV124 = 0. The standard value in the project is CV124 = 18.

Every start in shunting mode triggers a short horn. This script-driven feature requires three conditions: F3 enabled, engine sound on via F8, and starting from zero speed. CV837 = 8 disables it (default CV837 = 0).

F5 Coasting vs F6 Engine to Maximum RPM

If both functions are active, coasting (F5) takes precedence.

Compressor

The compressor is script-controlled in two ways:

  1. Random activation, provided the engine sound is on via F8. Engaging F17 cancels the random cycle.
  2. Direct activation via F17, which requires F8 to be on and zero speed.

CV837 = 1 disables F17, CV837 = 2 disables the random mode, and CV837 = 3 disables both.

Curve Squeal

Curve squeal is script-controlled and requires:

  1. F19 enabled together with the engine sound (F8).
  2. Speed higher than 14 (range 0–126).
  3. Speed lower than 100 (range 0–126).

Set CV837 = 4 to disable squeal.

Custom Function Mapping

You can customise the function layout via CV400 – CV428. The project itself does not use these CVs.

Decoder Reset

If you get lost in the settings, program CV8 = 8 to restore the project defaults.

Basic CV Settings in Project

  • CV3 = 16
  • CV4 = 14
  • CV5 = 1
  • CV6 = 1
  • CV29 = 14
  • CV33 = 1
  • CV34 = 2
  • CV35 = 4
  • CV36 = 8
  • CV37 = 0
  • CV38 = 0
  • CV39 = 0
  • CV40 = 0
  • CV41 = 0
  • CV42 = 0
  • CV43 = 0
  • CV44 = 0
  • CV45 = 0
  • CV46 = 0
  • CV57 = 125
  • CV105 = 145
  • CV106 = 5
  • CV124 = 18
  • CV125 = 88
  • CV126 = 88
  • CV127 = 88
  • CV128 = 88
  • CV190 = 100
  • CV191 = 50
  • CV254 = 6
  • CV255 = 1
  • CV256 = 1
  • CV266 = 64
  • CV395 = 130
  • CV396 = 27
  • CV397 = 28
  • CV836 = 1
  • CV837 = 0

Sound Sample Numbers

F4 CV522 47 Short Horn
F7 CV531 48 Long Horn
F10 CV540 49 Short Whistle
F11 CV543 50 Long Whistle
F12 CV546 51 Screw Coupler Down
F13 CV549 52 Screw Coupler Up
F14 CV552 55 Sanding
F15 CV555 53 New Dispatcher Whistle
F16 CV558 54 Old Dispatcher Whistle
script 45 Compressor
script 46 Wheel Squeal in Curves

"Script" means that the corresponding sound is used inside a script outside the normal CV mapping. The number is provided for standalone use when the script is disabled.