SoundTraxx DSD-150/DSX Owners Manual - Manual (Page 29)

Digital Sound Decoder Owner's Manual 29
Setting the Background Sound Effects
CV 51 is used to select which background sound effects are active as some may not be suitable for your particular
model (an oil burner for example will not have a fireman shoveling coal).
CV 51 can be programmed with any value between 0 and 255 (0xFF). However, each bit in CV 51 controls a different
effect and there are over 255 combinations! You will need to use the technique described under Bits and Bytes and
refer to the DSD Technical Reference to determine the proper value for CV 51. Alternatively, you can calculate the
value for CV 51 with a series of additions as follows:
1. Start with CV 51 set to 0.
2. The intervals at which the background sounds occur are spaced randomly by a ‘clock’ inside the DSD. This clock
can work in scale time so that sounds occur every few minutes or in real time so sounds occur every few hours!
To select real time intervals, add one to the value in CV 51. Otherwise, skip to step 3.
3. One of the DSD background sound effect is the sound of Airpumps building up pressure in the train line. If you
want to enable this sound, add 2 to the value in CV 51. Otherwise, skip to step 4.
4. A second DSD background sound effect is the sound of Fireman Fred building up a good draft in the firebox with
the blower. If you want to enable this sound, add 4 to the value in CV 51. Otherwise, skip to step 5.
5. Another DSD background sound effect is the sound of Fireman Fred scooping coal into the firebox. He’ll do this
whenever the loco is brought to a stop and again at random intervals. If you want to enable this sound, add 8 to
the value in CV 51. Otherwise, skip to step 6.
6. Another DSD background sound effect is the sound of Fireman Fred lubricating the side rods with his pneumatic
grease gun from time to time. If you want to enable this sound, add 16 to the value in CV 51. Otherwise, skip to
step 7.
7. Another DSD background sound effect is the boiler pop-valve blow off. This is a loud effect that runs for about 10
seconds at random intervals. If you want to enable the pop valve sound, add 32 to the value in CV 51. Otherwise,
skip to step 8.
8. The DSD’s Cylinder Blow Down effect can be operated as function key or automatically whenever the locomotive
comes to a stop. This frees up a function key to use for something else. If you want to use the Automatic feature,
add 64 to the value in CV 51. If you want to use the function key instead, skip to step 9.
9. The DSD background sounds selected in steps 2-8 will run whenever the locomotive is stopped. You can also
silence them without changing individual settings for when the engine is the roundhouse for example. If you want
the background sounds on, add 128 to value in CV 51 otherwise skip to step 10.
10. Program CV 51 with the new value calculated in steps 2-9.
Setting the Foreground Sound Effects
CV 52 is used to modify certain foreground sound effects. CV 52 can be programmed with any value between 0 and
255 (0xFF). However, each bit in CV 52 controls a different effect as with the Background Sound Effects, there are
over 255 combinations! You will need to use the technique described under Bits and Bytes, page 18, and refer to
the DSD Technical Reference to determine the proper value for CV 52. Alternatively, you can calculate the value for
CV 52 with a series of additions as follows:
1. Start with CV 52 set to 0.
2. If you are using the Auto-Exhaust feature with a simple articulated locomotive (both sets of cylinders the same
size) add one to the value in CV 52. This will produce a slightly uneven exhaust cadence effect. For all other types
of engines, skip to step 3.
3. The DSD features a Dynamic Digital Exhaust (DDE) processor that modifies the exhaust sound as the engine
load changes. To activate the DDE processor, add 2 to the value in CV 52. Otherwise, skip to step 4.
4. If you are using the exhaust cam to trigger the exhaust chuffs, add 4 to the value in CV 52. Otherwise, skip to
step 5.
5. If your locomotive has dual airpumps, add 8 to the value in CV 52 to activate the sound of another pump. If the
engine has only one airpump, skip to step 6.
6. You can also adjust how fast the bell rings over seven steps by adding 0, 16, 32, 48, 64, 80, 96, or 112 to the
value in CV 52. Do not add any other number as this may affect the settings made in steps 2-4! 0 will produce the
fastest ring rate and 112 will produce the slowest ring rate.
7. Program CV 52 with the new value calculated in steps 2-6.