"Where Detail Makes the Difference"
- Longmont, Colorado, U.S.A. -
1 (800) 472-2530 Local: (303) 772-1901 Fax: (303) 532-2352

InterMountain ESU OEM Sound Files
& OEM Sound File Function Mapping Tables

NOTE: Loading complete ESU sound and non-sound files into a locomotive requires an ESU LokProgrammer. You'll also need the latest version of the LokProgrammer software available here: LokProgrammer Software.
While it is easier, a LokProgrammer is NOT required for making any CV changes in your LokSound decoder. Any NMRA compliant DCC system can be used to make CV changes.

Starting in 2016, most InterMountain locomotives are being shipped with the prime mover sound OFF when track power is applied to the locomotive. Sound files below are listed for both sound ON and sound OFF with track power depending on your preference.

We have also included our OEM file for the flashing beacon on some of the HO SD40-2 locomotives.

Files for ESU LokSound SELECT Decoders

NOTE: These sound listed here only work on LokSound Select Decoders.
LokSound 5 DCC Sound Files Here

91471 - IMRC ESU OEM Sound File - HO Scale Cab Forward

91471 - IMRC HO Scale Cab Forward ESU Complete Function Mapping Table (.pdf) (Decoder Firmware Version 4.17.9249)

90486 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale ET44AC (Tier 4 GEVO)

90486 - IMRC HO Scale ET44AC (Tier 4 GEVO) ESU Complete Function Mapping Table (.pdf)

95433 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale Canadian National ET44AC (Tier 4 GEVO)

95433 - IMRC HO Scale Canadian National ET44AC (Tier 4 GEVO) ESU Complete Function Mapping Table (.pdf)

75438 - Sound OFF with Track Power - IMRC ESU Alternate Sound File - HO Scale ET44AC (Tier 4 GEVO)

75438 - IMRC ESU Alternate HO Scale ET44AC (Tier 4 GEVO) ESU Complete Function Mapping Table (.pdf) - COMING SOON!

75438 - Sound OFF with Track Power - IMRC ESU Alternate Sound File - HO Scale ET44AC Canadian National (Tier 4 GEVO)

75438 - IMRC ESU Alternate HO Scale ET44AC Canadian National (Tier 4 GEVO) ESU Complete Function Mapping Table (.pdf) - COMING SOON!

93420 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale SD40-2(W)

90448 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale SD40-2(W) with Beacon

93420 - Sound ON with Track Power - IMRC ESU OEM Sound File - HO Scale SD40-2(W)

93420 - IMRC HO Scale SD40-2(W) ESU Complete Function Mapping Table (.pdf)

73408 - Sound OFF with Track Power - IMRC ESU Alternate Sound File w/FULL THROTTLE - HO Scale SD40-2(W)

73408 - IMRC HO Scale SD40-2(W) ESU Complete Function Mapping Table (.pdf) for Alternate Sound File w/FULL THROTTLE - COMING SOON!

93421 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale ES44AC/DC

93421 - Sound ON with Track Power - IMRC ESU OEM Sound File - HO Scale ES44AC/DC

93421 - IMRC HO Scale ES44 (GEVO) ESU Complete Function Mapping Table (.pdf)

73423 - Sound OFF with Track Power - IMRC ESU Alternate Sound File w/FULL THROTTLE - HO Scale ES44AC/DC

73423 - IMRC HO Scale ES44AC/DC ESU Complete Function Mapping Table (.pdf) for Alternate Sound File w/FULL THROTTLE - COMING SOON!

93422 - IMRC ESU OEM Sound File - HO Scale U18B

93422 - IMRC HO Scale U18B ESU Complete Function Mapping Table (.pdf) - COMING SOON!

93423 - Sound OFF with Track Power - IMRC ESU OEM Sound File - HO Scale FT/F3/F7/FP7/FP9

93423 - Sound ON with Track Power - IMRC ESU OEM Sound File - HO Scale FT/F3/F7/FP7/FP9

93423 - Sound OFF with Track Power - IMRC F Units ESU Complete Function Mapping Table (.pdf)

93423 - Sound ON with Track Power - IMRC F Units ESU Complete Function Mapping Table (.pdf)

73436 - Sound OFF with Track Power - IMRC ESU Alternate Sound File w/FULL THROTTLE - HO Scale FT/F3/F7/FP7/FP9

73436 - IMRC HO Scale FT/F3/F7/FP7/FP9 ESU Complete Function Mapping Table (.pdf) for Alternate Sound File w/FULL THROTTLE - COMING SOON!

93427 - IMRC ESU OEM Sound File w/Full Throttle - HO Scale GP10 with Gyra Headlight

93427 - IMRC HO Scale GP10 with Gyra Headlight ESU Complete Function Mapping Table (.pdf)

90471 - IMRC ESU OEM Sound File w/Full Throttle - HO Scale GP10 non-Gyra Headlight

90471 - IMRC HO Scale GP10 non-Gyra Headlight ESU Complete Function Mapping Table (.pdf)

93820 - IMRC ESU OEM Sound File - N Scale SD40-2

93820 - IMRC N Scale SD40-2 ESU Complete Function Mapping Table (.pdf)

Files for ESU LokSound 5 DCC Decoders

NOTE: The sound files listed here only work on LokSound 5 DCC Decoders.

HO & N Scale Cab Forward 4-8-8-2

S0509 - IMRC ESU Alternate V5 DCC Steam 4-8-8-2 Southern Pacific Cab Forward Sound File - (22.7MB)

ALL HO Scale F units (FTA/B, F3A/B, F7A/B, FP7, FP9)

S0711 - IMRC ESU Alternate 1 V5 DCC EMD 16-567BC 2-Exhaust Non-Turbo Sound File - (25.5MB) -

S0768 - IMRC ESU Alternate 2 V5 DCC EMD 16-567C 2-Exhaust Non-Turbo Sound File - (26.8MB) -

S0746 - IMRC ESU Alternate 3 V5 DCC EMD 16-567B 2-Exhaust Non-Turbo Sound File - (28.4MB) -

HO & N Scale SD40-2 Ditch Lights

S0508 - IMRC ESU Ditch Lights Alternate 1 V5 DCC EMD 16-645E3B Turbo Sound File - (31.3MB) -

S0710 - IMRC ESU Ditch Lights Alternate 2 V5 DCC EMD 16-645E3 Turbo Sound File - (30.9MB) -

HO & N Scale SD40-2 Rotary Beacon

S0508 - IMRC ESU Beacon Alternate 1 V5 DCC EMD 16-645E3B Turbo Sound File - (31.3MB) -

S0710 - IMRC ESU Beacon Alternate 2 V5 DCC EMD 16-645E3 Turbo Sound File - (30.9MB) -

HO & N Scale SD40-2W Ditch Lights

S0732 - IMRC ESU Alternate 3 V5 DCC GMD SD40-2W 16-645E3B Turbo Sound File - (29.2MB) -

HO Scale GE ES44 Early Tier 2 / Tier 3 GEVO

S0523 - IMRC ESU Alternate 1 V5 DCC GE 12-GEVO Late Exhaust Sound File - (27.4MB) -

S0715 - IMRC ESU Alternate 2 V5 DCC GE 12-GEVO Late Exhaust Sound File - (30.5MB) -

HO Scale Paducah GP10

S0717NG - IMRC ESU Alternate V5 DCC EMD 16-567C 4-Exhaust Non-Turbo Sound File - (29.4MB) - Non-Gyra Headlight

S0717G - IMRC ESU Alternate V5 DCC EMD 16-567C 4-Exhaust Non-Turbo Sound File - (29.4MB) - Gyra Headlight

HO Scale GP16

99474 - IMRC OEM ESU V5 DCC EMD 16-645C 4-Exhaust Non-Turbo Sound File - (30.6MB)

HO Scale GE ET44AC "Tier 4" GEVO

93486 - IMRC OEM ESU V5 DCC GE 12-GEVO-12LDD6-Late Exhaust Sound File - (31.8MB) - UP, BNSF, CSX, NS VERSION -

11477 - IMRC OEM ESU V5 DCC GE 12-GEVO-12LDD6-Late Exhaust Sound File - (31.8MB) - CN VERSION -

HO Scale GE U18B

S0576 - IMRC ESU Alternate V5 DCC GE 8-7FDL8D2 Sound File - (31.3MB) -

InterMountain Railway Company

P.O. Box 839

Longmont, Colorado
80502-0839

E-mail InterMountain