Class 350/380 Sound Mod

The Desiro UK is Siemens Mobility UKl's first time bringing their commuter rail concept, as a platform, over to the United Kingdom. Its name signifies the uniqueness in design just to serve British railways, and has now made it so far as to debut in the Train Sim World franchise as a driveable model train. These multiple units make the most of Siemens' industrial engineering by capitalising on Krefeld and Erlangen's ongoing Vehicle Control Unit (VCU) technology: SIBAS. This power management system functions as a traction and inverter controller (TCU/ICU) using digital signal processors (DSPs) that tie to a 32-bit microprocessor... SIBAS 32 as you may have heard. There are different versions of this container for different applications. It controls the converters so that they generate the correct waveforms by Field Oriented Control. Not only this, but it boasts a real emphasis and Electro-Magnetic Compatibility (EMC) by modulating the voltage carrier - thus scattering the PWM frequency power density across the spectrum in a periodic fashion. Armstrong Powerhouse called this the "UFO" sound, which is complete nonsense to say the least. The method is called Periodic Carrier Frequency Modulation (PCFM), and can be found in multiple trains across the world! The following mod is here to do Desiro UK traction drives the justice they deserve, to get it as correct-sounding as I can:

Epic Traction Audio

• As the clock speed of IGBTs increase, the subtle timing errors become more apparent with undershoots and overshoots - fraying sidebands about the frequency carrier which has been added
• Per my inductor recording of the Class 350, the 100Hz periodic modulation of the carrier constricts to 0Hz for tolerance of said sidebands before sync https://youtu.be/e-DmEZH1WJc?t=100
• The synchronous modes have been mixed into the traction audio using real Class 380 recordings and can always be heard up to and beyond the maximum speed of the train
• PCFM sounds are crystal clear, match the current waveforms to the letter, and there are separate interior and exterior sounds
• 750VDC mode will play separate, correct, PCFM sounds on the Class 350 at exclusively the 1450Hz frequency band (heard at 2900Hz) as per reality using Class 450 recordings
• Remixed audio includes real gearbox sounds from the Class 380

Insane Number of Flange Squeals

• I've added over 60 individual squeaks, squeals, and squarks which have been mixed to play non-stop / one after the other like there's no tomorrow
• All flanges are taken directly from my recordings with minimal editing: https://youtu.be/U0Qmtj-myWU?t=37
• On top of this, there are 4 looping flange sounds in the background for very slow speed, slow speed, moderate speed, and high speed rolling
• Included are the suspension creaks of the old Siemens SF5000 commuter rail bogie types for Desiro - recorded from the Class 380

New Running Recordings

• As usual, I have added many more detailed running recordings taken from the Class 350 and Class 380
• There are separate interior and exterior recordings added in
• Further away, separately recorded approach sounds are mixed in to create an authentic rush including the tingling track

Many New Joint Sounds

• A total of 122 track joint sounds have been added to the Desiro UK's audio mix recorded from the Class 350, 380, 450, and 700 to give the best experience
• Separate interior and exterior joint clips will play with air absorption

Remixed Miscalleneous Noises

• These include the likes of fans and HVACs using Class 380 and Class 450 recordings
• There are a variety of Class 380 sounds which have a random chance of playing: high fan speed sounds, low fan speed sounds, and delays in fans starting up for both cab and saloon
• The Class 350 will play both HVAC whirrs and ACU whines outside
• New transformer and converter sounds have been added with improved looping and clarity
• Various Class 380 door alarm sounds have a random chance of playing as well: new speakers, and worn-out/damaged speakers with separate interior and exterior recordings
• A random assortment of Class 350 / Class 450 door alarm sounds will play by chance, with separate interior and exterior recordings including the leafs themselves
• This mod replaces and remixes the horn of the Class 350/380 with new recordings that have greater reverb

Known Issues

Tags: class-380 class-380-sound-mod desiro-uk glasgow-cathcart sound-mod