775, 776 (ex T678.0, T679.0) "Orange" – 8bit General Project

Project version 204.1.5
T679.019 Orange

Sound sample

Project Information

  • General sound project suitable for custom modifications, mainly for individual lighting settings.
  • The sound project is designed for 8-bit MX series sound decoders.
  • Recommended minimum decoder software version is 40.22.
  • The decoder has a base address of 3.
  • Reset can be performed by setting CV8 = 8.

Function Assignment

Function mapping and CV settings can be modified.

  • F0 Position white lights
    Affected function output: FA0v, FA0r
    Direction dependent
  • F1 Reserved for lights
    Affected function output: FA1
  • F2 Reserved for lights
    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
    Also random sound
  • F18 Unused
  • F19 Wheel squealing in curves
  • F20 Station announcement R 540
  • F21 Unused
  • F22 Station announcement REX1724
  • F23 Unused
  • F24 Unused
  • F25 Unused
  • F26 Sound muting
  • F27 Volume decrease
  • F28 Volume increase

Maximum Speed Setting

We recommend setting the maximum speed via CV57, not CV5. Setting maximum speed via CV5 may cause changes in sound range. The acceleration time CV3 and deceleration time CV4 settings are not affected by setting maximum speed via CV57.

Shunting Mode

In the general project, position lights are turned off in shunting mode. In models, it is common to connect position lights that illuminate simultaneously with headlights. If this functionality is desired, it can be enabled by setting CV37 = 3.

The mode reduces acceleration and braking times to ¼ of the settings in CV3 and CV4. If this functionality is not desired, it can be disabled by setting CV124 = 16. Complete deactivation of acceleration and braking times is possible by setting CV124 = 19.

If the shunting mode functionality is not desired, it can be disabled by setting CV124 = 0.

The standard shunting mode setting in the project is CV124 = 18.

In shunting mode, a short horn is triggered at each start. This functionality is handled by script.

For the short horn to trigger, three conditions must be met:

  1. The function itself must be enabled via F3.
  2. The engine sound must be enabled via F8.
  3. The model must be accelerating from zero speed.

Setting CV837 = 8 disables this functionality, standard setting CV837 = 0.

F5 Coasting vs F6 Engine Start to Max RPM

If both functions are enabled, coasting takes precedence.

Compressor

The project implements two versions of compressor triggering, both handled by script:

  1. Random compressor triggering, which is conditioned by enabling the engine sound via F8. This is disabled by enabling the compressor via F17.

  2. Enabling the compressor via F17. It is conditioned by enabled F8 and zero speed.

Setting CV837 = 1 disables the ability to trigger the compressor via F17.

Setting CV837 = 2 disables random compressor triggering.

Setting CV837 = 3 disables both options, standard setting CV837 = 0.

Wheel Squealing in Curves

Wheel squealing in curves is handled by script. For triggering, several conditions must be met:

  1. The function itself must be enabled via F19, and the engine sound must be enabled via F8.
  2. The sound will not trigger at very slow speeds, the set speed must be more than 14 (from the speed range 0 – 126).
  3. The sound will not trigger at high speeds, the set speed must be less than 100 (from the speed range 0 – 126).

Setting CV837 = 4 disables wheel squealing in curves, standard setting CV837 = 0.

User Function Layout Setting

User function layout setting is possible via CV400 – CV428. The project does not use this for its own purposes.

Decoder Reset

It may happen that while setting up the decoder, you make a mistake that you cannot fix or get lost in the settings. In this case, we recommend performing a decoder reset. To reset the decoder, program CV8 = 8. This programming will reset to the sound project settings.

Basic CV Settings in Project

  • CV3 = 16
  • CV4 = 14
  • CV5 = 1
  • CV6 = 1
  • 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 = 3
  • CV191 = 2
  • CV254 = 204
  • CV255 = 4
  • CV256 = 1
  • CV257 = 5
  • CV266 = 100
  • CV374 = 5
  • CV339 = 6
  • CV340 = 4
  • CV395 = 130
  • CV396 = 27
  • CV397 = 28
  • CV386 = 1
  • CV837 = 0

Sound Sample Numbers

28 F4 CV522 Short Whistle
27 F7 CV531 Long Whistle
1 F10 CV540 Short Whistle
2 F11 CV543 Long Whistle
23 F12 CV546 Uncoupling Screw
24 F13 CV549 Coupling Screw
25 F14 CV552 Sanding
31 F15 CV555 Dispatcher Whistle - New
32 F16 CV558 Dispatcher Whistle - Old
26 F20 CV673 Announcement R 540
33 F22 CV679 Announcement REX1724
3 script Compressor
22 script Wheel Squealing in Curves

"Script" means that the corresponding sound is used in the script, outside of normal use within CV. The sound number is listed here for possible standalone use of the sound when the script is disabled.