Amtrak AEM 7 Electric Loco

Project electra E .spj RE WORK by Miniatureengineer:EMD/ASEA AEM-7 sound scheme.  Copright (c) Alex Stroshane 3 August 2008
all attributes to the original Authors for the ability to be able to use this sound project
project: AEM7.spj
SDF:  EMD/ASEA AEM-7 Electric Scheme
Author:  Alex Stroshane
Most of the spj's in this rework have been changed in some way or form and new ones added to make this project what it is
(A) Function Key Usage:

F0-     Lights
F1-    Bell
F2-     Horn              [CV150 selects Horn type]
F3-     Coupler crash        [Autocoupler/brake set by  CV151 max spd]
F4-     Air features disable - F4 to OFF enables pop-off,drier and starts compressor
F5-     Dynamic brakes
F6-     Not assigned
F7-     Not assigned
F8-     Mute control,     [F8 ON is muted.]
F9-     Engine brake squeal
F10-     Grade crossing airhorn sequence
F11-    Milepost indicator

(B) AEM-7 Sound FX defined CV's:     [sound project download reset value in sq. brackets]

CV58    Master Volume, 0-15, 0= max, (F8 used for mute) [9]

CV122    Product type, 12 = Digitrax SFX sound decoder     (Read Only Value)
CV123    Hardware version                   (Read Only Value)

CV135    Volume when muted                [00]

User configurable Sound CV's:

CV140    Prime mover volume            0-64    [60]
CV141    Bell volume                0-64    [20]
CV142    Horn volume                0-64    [60]
CV143    Air features volume (popoff, drier, comp) 0-64    [30]
CV144    Dynamic brake volume            0-64    [30]
CV145    Misc volumes                 0-64    [40]        
CV146    Bell delay (1 = 24mS)          1-100        [0]   
CV147    Drier rate (1 = about 2 secs)          1-64    [05]
CV148    Compressor start rate                [30]
CV149     Compressor run time                [20]
CV150    Horn select: 0=default, 1=playable default, 2=alt. horn, 3=playable alt.    [0]
CV151     Peak speed to allow auto coupler/brake on DIR change and F3 on  0-60         [48]
CV152    Author ID    Alex Stroshane = 0xAA        [170]
CV153    Project ID    AEM-7                [09]
CV154    Auto horn signals: 0 = Off, 1= On    0-1    [00]
CV156    Bell selector: 0=default, 1=alternate    0-1    [00]


(C) General Notes

This sound project was designed for the AEM-7 locomotives built for Amtrak and several commuter railroads by EMD, ASEA and
Budd. The same sounds would also be suitable for the ALP-44 locomotives owned by New Jersey Transit.

Because the throttle of an electric locomotive is continuous, with no "notch" positions, there is no semi-auto or manual
notching functionality in this project. Instead, the sound of the traction motors varies directly with the speed. In real
life, little is heard above the humming sound of the blowers that run constantly - electrics are a lot quieter than diesels!

This sound project has been assembled from Digitrax-supplied sound clips as well as new sounds from custom recordings. I am
also indebted to Bob Grosh and Fred Miller for their early work in deciphering the SDF language and engineering new functions.

Some engine sound recordings by Alex Stroshane, copyright 2006, recorded in Boston, MA and Wilmington, DE.

Additional engine and horn/bell sound clips courtesy of Matt Donnelly, recorded from various prototypes around the Northeast.


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