721 (ex T458.1) – 8bit General Project

Verzia projektu 210.1.7
721 (ex T458.1) – 8bit General Project
16bit

Sound sample

Project Information

  • General sound project suitable for custom modifications, mainly for individual light settings.
  • Sound project is designed for 8-bit sound decoders of MX series.
  • Recommended minimum decoder software version is 40.22.
  • Decoder has base address set to 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 Unused
  • F21 Unused
  • F22 Unused
  • F23 Unused
  • F24 Unused
  • F25 Unused
  • F26 Sound muting
  • F27 Volume decrease
  • F28 Volume increase

Max. Speed Setting

We recommend setting max. speed via CV57, not via CV5. Setting max. speed via CV5 may cause changes in sound range. Acceleration time CV3 and deceleration time CV4 settings are not affected by max. speed setting 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 required, it can be enabled by setting CV37 = 3.

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

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

Standard shunting mode setting in the project is CV124 = 18.

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

For triggering the short horn, three conditions must be met:

  1. The function must be enabled via F3.
  2. Engine sound must be enabled via F8.
  3. The model must be starting from zero speed.

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

F5 Coasting vs F6 Engine Acceleration to Max RPM

If both functions are enabled, coasting takes precedence.

Compressor

In the project, two versions of compressor triggering are implemented, both are handled by script:

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

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

Setting CV837 = 1 disables the possibility of triggering compressor via F17.

Setting CV837 = 2 disables random compressor triggering.

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

Wheel Squealing in Curves

Wheel squealing in curves is implemented by script, several conditions must be met for triggering:

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

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

User Function Layout Setting

User function layout setting is possible via CV400 – CV428. The project does not use it for its needs.

Decoder Reset

It may happen that while setting up the decoder you make a mistake that you cannot fix or you get lost in the settings. In this case, we recommend performing a decoder reset. For decoder reset, program CV8 = 8. This programming will perform a 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 = 210
  • CV255 = 1
  • CV256 = 7
  • CV266 = 110
  • CV339 = 6
  • CV340 = 6
  • CV374 = 5
  • CV375 = 0
  • CV395 = 130
  • CV396 = 27
  • CV397 = 28
  • CV386 = 1
  • CV837 = 0

Sound Sample Numbers

22 F4 CV522 Short Whistle
23 F7 CV531 Long Whistle
24 F10 CV540 Short Whistle
25 F11 CV543 Long Whistle
26 F12 CV546 Uncoupling Screw
27 F13 CV549 Coupling Screw
28 F14 CV552 Sanding
29 F15 CV555 Dispatcher Whistle - New
30 F16 CV558 Dispatcher Whistle - Old
31 script Compressor
32 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.