ALCO RS32 #30 Diesel

Digitrax RS32 #30 Sound scheme.  Copright (c) Digitrax Inc. July 8th 2007

project: RS32.spj
SW1 SDF:  ALCO RS32 #30 Diesel Scheme
Author  AJ Ireland
    Digitrax Inc.

(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 feature disable- F4 to OFF enables pop-off,drier and starts compressor
F5-     Handbrake feature
F6-     Manual Notch UP, if CV155 is not 00
F7-     Crossing Gate Airhorn    - or Manual Notch DOWN, if CV155 is not 00
F8-     Mute control,     [F8 ON is muted.]
F9-     Engine Brake squeal
F10-     Crossing gate Airhorn sequence
F11-     SW1 sanding cycle
F12-     SW1 cab door closing



(B) ALCO RS32 Sound FX defined CV's:     [decoder CV8=8  Factory 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)

CV132    Notch rate                    [127]
CV135    Volume when Muted                [00]

User configurable SoundCV's:

CV140    PRIME mover vol                0-64    [60]
CV141    BELL vol                0-64    [25]
CV142    WHISTLE volume                0-64    [60]
CV143    Air features volume (popoff, drier,comp) 0-64    [30]
CV145    Misc vols                 0-64    [40]        
CV146    BELL delay (24mS counts)          1-100    [7]
CV147    Drier rate, 1= about  2secs      1-64        [2]
CV148    Compressor Start rate                [30]
CV149     COMPRESSOR ON time                [20]
CV150    Horn Selector        0=std RS32 Horn , 1=Playable volume  Horn 2=Alternate Horn     [0]
CV151 PEAK speed to allow AUTO coupler/brake on DIR change and F3 on.  0-60         [48]
CV152    Author ID        Digitrax=0xdd        [221]
CV153    Project ID        RS32            [10]
CV154    Unused
CV155    Notching Mode,0=AUTO, 1=SEMIAUTO,2=MANUAL NOTCHES [0]    


(C) General Notes

This sound recording courtesy of Arkansas and Missouri Railway Short Line Scenic railroad and Kenny the
Maintenance Manager,
Visit arranged by Loy Spurlock.
All sounds recorded by AJ Ireland at Springdale AR, June 23rd 2007.

Note:  This RS32 prime mover has significant low-frequency components at idle and low notch settings,
so the speaker enclosures should be as large as possible behind the diaphragm to extend adequate frequency response below
e.g. 300Hz. This will ensure a more "full" sound that does not appear thin or "tinny".
 
Each engine we have recorded has a distinct 'personality', so a particular locomotive example may sound slightly different
due to unique e.g. tappet, crank-rate shell vibrations and exhaust-stack differences. Horns and bells are often moved between locomotives, and
some roads may change/upgrade prime-movers, or change a normally aspirated engine with turbo-chargers etc.
Recording aspect and location reverberation also significantly affect the final sound scheme impact.


For CV155=01 ["Semi_automatic Notching"],  the Prime mover lowest Notch setting is set by
 the throttle speed setting. F6 (ON) can increase the Notch and F7 (ON) will decrease the Prime mover
to the minimum notch set by current throttle setting.
If you leave F5 on, you can wind the engine handbrake forever!!



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