BR Class 42

Project: BR Class 42
SDF:  2nd Generation Diesel reworked by Dave C
Author:  Tim

(A) Function Key Usage:

F0-     Lights
F1-    Shutdown Engine
F2-     Horn          
F3-     Horn 2        
F4-     Air features disable        [F4 off enables drier and compressor]
F5-     Air Break release        [Leave on to sound each time before moving off]
F6-     Manual notch up            [If CV155 is not 00]
F7-     Manual notch down        [If CV155 is not 00]
F8-     Mute control            [F8 to ON is muted]
F9-     Brake squeal            [Leave F9 on for auto brakes]
F10-     User Sound            [Cab door]
F11-     User Sound            [Tyre squeel]
F12-     User Sound            [Coupling]

(B)    Sound FX defined CVs:         [sound project download reset value in sq. brackets]

CV58    Master Volume, 0-15        [9]
CV122    Product type, 12 = Digitrax SFX sound decoder     (Read Only Value)
CV123    Hardware version                   (Read Only Value)
CV132    Notch rate (higher values = closer spacing)    [64]
CV135    Volume when muted                [00]
CV140    Prime mover volume            0-64    [40]
CV141    Not Used                    [25]
CV142    Horn volume                0-64    [60]
CV143    Air features volume            0-64    [20]
CV144    Air Release volume            0-64    [50]
CV145    Misc volumes                 0-64    [20]        
CV146    Not Used                    [0]
CV147    Drier rate (1 = about 2 secs)          1-64    [10]
CV148    Compressor start rate            1-100    [30]
CV149     Compressor run time            1-100    [20]
CV150    Not Used                    [0]
CV151     Not Used                    [0]
CV152    Author ID    Alex Stroshane = 0xAA        [170]
CV153    Project ID    2nd Generation Diesel        [10]
CV154    Not Used                    [0]
CV155    Notching mode: 0 = Auto, 1 = Semiauto, 2 = Manual [0]    
CV156    Startup master volume            0-255    [192]
CV157    Notch Resume in seconds    0=off        0-64    [06]
CV158    Apply driving style    0=on, 1= off         [01]


(C) General Notes

D Clark 2012

This is a rework of the project listed below, all credit to the orignal authors.

This rework has a reduced number of notch's and redefined functions to suit a UK locomotive better.
CV158 defines a driving style, if this is set to 0 (on) then the loco will notch up whenever the
Digitrax internal notch increases and decrease whenever the Digitrax notch increases. as there are
less playable notches than digitrax notchs this means that the loco can coast when decelerating
CV157 sets a maximum amount of time in seconds that the loco can coast for, after this time the
loco starts to resume the notch defined for the speed of the loco.

e.g.

Playing Notch    Digitrax Notch
1        1
2        2
3        3
4        4
5        5
5        6
5        7
4        6    - when you start to reduce the speed the notch reduces to allow the loco to coast
3        5
2        4
1        3    - speed held setady and loco continues to coast
1        3
1        3
2        3    - after the number of seconds set in CV 157 the loco starts to resume the actual power notch
3        3    
etc.


This is a functional beta version of a project using individual sound recordings for each prime mover notch setting. These
prime mover sounds can be played in three modes determined by CV155: automatic, semi-automatic and manual notching. In auto
mode, the prime mover notch is determined by the current speed setting, and is adjustable using CV132. In semi-auto mode,
the same is true but it is possible to "throttle up" to higher notches using F6 and F7, if you want your engine to sound
like it is working harder. Manual mode offers full control of the notch setting using F6 and F7, so you can throttle down
to idle and turn on dynamic braking while coasting downgrade.

Other features available in this project include:
- Choice of 2 different horns
- Choice of 2 different bells
- Automatic grade crossing horn sequence with bell
- Optional highball and backup horn signals while stopped
- Dynamic brakes at speed, or handbrake while stopped
- Automatic coupler sounds when changing direction at low speeds
- Automatic brake squeal sounds when decelerating to a stop
- Additional user-defined sounds on F11 and F12

Using this project as a template, it would be simple to substitute your own sounds for the prime mover, horn, bell, etc. The
included sounds are appropriate for an EMD 2nd-generation 645 non-turbo prime mover, found in engines such as the following:

GP15-1
GP38
GP38AC
GP38-2
SD38
SD38AC
SD38-2
SW1000
SW1001
SW1500
MP15AC
MP15DC

If you encounter any problems with this project, or have any suggestions for future versions, feel free to contact the author,
Alex Stroshane: stroshane.a@gmail.com

This sound project has been assembled from Digitrax-supplied sound clips as well as new sounds from custom recordings.
Additional engine and horn/bell sound clips courtesy of Matt Donnelly, recorded from various prototypes around the Northeast.

Thanks are due to Fred Miller, Bob Grosh, Jim Walton and A.J. Ireland for their prior work in developing sound projects.

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