BR Class 251 Blue Pullman

Project: BR Class 251 Blue Pullman
SDF:  2nd Generation Diesel reworked by Caz
Author:  Caz from some work done by Tim & Dave

(A) Function Key Usage:

F0-  Lights
F1- Reserved for Lights
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-  Cab door   [Cab door]
F11-  Startup/Shutdown Engine   
F12-  Buzzer   [Buzzer]
F14-    Guard Whistle           [Guard Whistle]

(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
Caz 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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