Removing Random Spikes and Oscillations from Moza Wheelbases

[tororutsu]

I am starting this discussion 1) to not make a mess of current issues, and 2) to track my progress and knowledge on getting rid of random jerks and oscillations from my Moza software.

@leppie On your R3 do you suffer from oscillations, or just menu spikes/jerks?

[tororutsu]

https://gist.github.com/tororutsu/11053a7cc210d218badb9190be4c4fcf
These are my current LMUFFB settings
And these are my current Moza settings with 100% across the board on the equalizer.

[leppie]

Here my config https://gist.github.com/leppie/699de1aa46cfbebdc45d4ff702de2163

Ingame: 70%, 0 smoothing, 60% collisions.
Moza pithouse: main forces 100. everything else 0 or 100 (what ever option fits).

This is pretty light feeling setup, so you can add what you want.

But it has sufficient detail for me.

The main thing is understeer effect 0% and scrub drag 50% or so.

This allows you feel the difference between a bump and understeer.

[tororutsu]

Are you still getting menu/garage spikes?
And honestly still newish to sim Racing so it's gunna take me a minute to break down these sliders and see what really affects what

[leppie]

Are you still getting menu/garage spikes?

Unfortunately, yes.

But hopefully the profile will make everything else more enjoyable.

It is mosty just the default profile, and tuned down for the R3.

Tip: You can use the torque monitor in pithouse to see the wheel torque better.

[tororutsu]

I don't experience garage spikes with my current setup. I still get menu ones though

[leppie]

For me too, garage ones are rare bit still there.

The menu one is normally more surprising as you are not holding the wheel with more than 1 hand at the time.

[tororutsu]

@leppie & @coasting-nc the newest release brought back Garage Spikes and even worse Oscillations!

[leppie]

I went back to 175 from before the weekend. 197 has this rythmic vibrations on the straights. Not sure if this is what you mean by oscillation (technically it is). Also the 'safety' features seemed to have comeback in 197.

[tororutsu]

Mine is anything but rhythmic. I will have my hands ripped off on Sebring Straight at any speed.

[coasting-nc]

@leppie for the rythmic vibrations on the straights, try the new preview build v0.7.201, it has a series of fixed for that: https://coasting-nc.github.io/LMUFFB/

[coasting-nc]

When I tried the app, I never noticed any difference in opening either first.
However, someone reported on the LMU forum that he had problems (stuttering) if launching the app while already driving in LMU.

[tororutsu]

OK, i havent noticed any issues as well but saw that post.

Regarding 201, Stationary Oscillations in the Pit are big. If i center the wheel it stops. but the minute the degree angle passes zero oscillations will start. Stationary or Moving it does not matter.

As long as my wheel is 0 degrees, if i exit to menu i get no spikes. So something regarding axis degrees?

[coasting-nc]

I've opened this issue about it: #418
It needs some codebase investigation to determine the cause.
Wheelbase settings might also be a factor.

[leppie]

I can only try tomorrow.

[leppie]

had a proper test on 207 tonite, big step forward in getting almost everything right.

I do still get this rhythmic vibration, but very little, not unpleasant (not sure if I like or dislike it, might be flat spot related, if so, then it is doing it's job).

[tororutsu]

@coasting-nc I can confirm that Hands-Off Protection in Moza software removes all spikes, and with high enough inertia removes oscillations.
Moza has 2 Protection Modes, I tried Mode 2 which is known to cause weaker FFB, so I will try mode one and come back to this.

[leppie]

Mode 2 adds this almost unperceptable wobble on the wheel. I dont like that. My inertia and wheel speed is still at 100%.

[leppie]

BTW what is your firmware version? I am on 1.2.7.12 (says latest).

[tororutsu]

BTW what is your firmware version? I am on 1.2.7.12 (says latest).

Same

[leppie]

What wheel? I have the Formula mod on ESX.

[tororutsu]

Same as well, on the R5 tho

[coasting-nc]

Created this issue for the spikes, identified a possible fix: #426 "Pause/Menu Spikes when the wheel is off-center "

[coasting-nc]

Preview build with the fix for the Pause/Menu Spikes when the wheel is off-center: v0.7.205 https://coasting-nc.github.io/LMUFFB/branches/fix-issue-426-pause-spikes-9242749486660349686/

@tororutsu @leppie Let me know if the Pause/Menu Spikes when the wheel is off-center are gone now.

[coasting-nc]

@tororutsu @leppie regarding oscillations, is the issue also mainly (or exclusively) when stationary?
If that is the case, the app could easily add damping or inertia when the speed is zero and fix the issue completely.

[tororutsu]

Put my wheel at 45 degrees
loaded up LMUFFB
Loaded into LMU
Loaded into pits
Wheels shakes
If I completely stop the wheel, no matter the angle of degree, the wheel will not move.
The moment the wheel is touched, oscillations start and don't stop no matter what. Driving or Stationary.
Until the wheel is completely stopped again.
And this is with Hands-Off Protection enabled

[coasting-nc]

I will add a fix (damping) for when the car is stationary, and it will fade up to about 15-18 km/h.
If there are any other oscillations while driving at normal speed (more than 15 km/h), and taking the hands off the wheel (which should be a rare event), those will need other solutions (please open separate GitHub issues about them).

[coasting-nc]

Preview build with the fix for Stationary (and low speed) Oscillations : v0.7.207 https://coasting-nc.github.io/LMUFFB/branches/fix-issue-430-stationary-damping-improvements-4681804477284668017/

Note: this added the slider "Stationary Damping" which is already enabled by default at 100%. It is in the "General FFB" section, after "Min Force".

@tororutsu @leppie Let me know if the oscillations are gone now.

[tororutsu]

I will let you know in the morning, it's 2am here

[leppie]

This build is working well. I was going to mention some stationary weirdness, but I probably just to tone that down (feels a bit stronger than before). Constant force spikes seems to be gone, it is just momentatry when it happens (replicatable with pausing when doing donuts). It is still quite a strong and suddenly jolt. The join/leave stutters are way better now too (could barely tell). Read further.

@tororutsu Set the Advanced Stationary Gate to min/max and see if that is what causes your oscilations. It seems to happening when you are within that range. Unfortunately you can't turn on full at 0%. Min is 1.0. This seems to remove quite a bit. Another thing I noticed is the Moza gear change effect when stationary will also cause in that range. So it might be the Moza effect feedbacking into this. I have turned it off in Moza for now.

[leppie]

@coasting-nc the stationary graininess I felt is caused by the stationary effect. 50% is probably good, but I have it at 25% now as I felt it was too heavy. My gate is 1 kph (min) still. Will test later if this affects spikes as I could only get a tiny one out from a donut manoeuvre.

Also Min force maxed without stationary damping is wobble hell when staionary! (was just playing around).

[coasting-nc]

To recap:

• Strong stationary oscillations confirmed as fixed with build 0.7.207 (stationary-damping-improvements).
• Strong spikes or jolts also seem to be significantly reduced, except for edge cases (eg. pausing when doing donuts). Edge Case: strong and suddenly FFB Jolt when pausing while doing donuts #439
• As of this build, the "join/leave stutters are way better now too (could barely tell)."

However, the "Stationary Vibration Gate" settings (in the "Advanced Settings" section at the bottom of the app), seem to be interfering with the new Stationary Damping and are causing graininess. User finds we should allow to completely disable these (by setting the "Full Above" slider to 0). Opened this issue about it: #438

Please confirm if this issue is also fixed or not: #419 "Wheel rotates strongly full lock to the left or right when returning to the game or menu "

[tororutsu]

I can confirm that at 40% Stationary Damping my wheel does not move in the pits, and dangerous, really heavy jolts seems to be gone. I do have menu jolts but way less powerful and very manageable.

If I quit to menu my wheel does want to drift to the left, I can stop it but it wants to drift to about 50-60 degrees before it stops on its own.

Low speed Oscillating is severe with Hands-Off Protection off, but almost gone with it on.
High speed Oscillating seems to be around no matter the settings.

I am rocking 100% FFB the the app and Moza so maybe I'll try messing with those settings as well, although I do prefer not to add damper thru pit house if possible.

Advanced Stationary Effects seem to have no noticeable difference min or maxed, notice no benefits or problems with it.

[leppie]

FYI, too keep cross talk to minimum, I am creating a discussion just for me.

#445

[coasting-nc]

Here is a new preview build that should refine the previous changes that reduced graininess and vibrations: v0.7.222 https://coasting-nc.github.io/LMUFFB/branches/issue-469-dsp-math-upgrades-1228367510942581948/

While graininess and vibrations were fixed in the previous version (v0.7.207), the changes acted as a massive low-pass filter. It delayed the steering angle and smoothed over all the high-frequency suspension data, which in DD wheels would result in a sluggish "damped" feeling.

@tororutsu @leppie Please review this new build to confirm that:

• there are still no graininess or vibration issues
• if you feel any difference in overall feel
• oscillations at high speeds with hands off (or hands lightly on the wheel): any differences there?
• what about the edge cases you identified before (eg. pausing when doing donuts): any differences?

---

The changes should be felt in the following FFB effects:

• Seat of Pants (Weight Transfer), Yaw Kicks, and Suspension Bottoming.
  • This should also reduce the impact of kerbs that has been frequently reported as an issue.
• Road Texture, Slide Texture, Wheel Spin, and Lockup Vibrations.
• Gyro Damping, Stationary Damping, and Soft Lock.

I have also added a new toggle in the Advanced Settings (at the bottom of the app) called "Telemetry upsampling -> Aux. Telemetry Reconstruction". By default, it is now set to Zero Latency (Predictive).

The reconstruction filter pipeline has been rewritten, and the telemetry channels have now been grouped into 3 groups, each with different signal processing settings:

1. Chassis Kinematics & Impacts (G-Forces, Suspension Pushrod Force)

• Impacted Effects: Seat of Pants (Weight Transfer), Yaw Kicks, and Suspension Bottoming.
• The Change: These channels are hardcoded to Always Smooth.
• How it feels: If you hit a massive kerb, the game engine outputs a violent, instantaneous 50G spike. Instead of passing that raw spike to your Simagic (which causes a metallic, wrist-breaking jolt), the filter acts as a mechanical shock absorber. You will feel a deep, heavy, realistic "thud" of the chassis bottoming out, while the steering and road texture remain completely raw and detailed.

2. High-Frequency Texture (Suspension Deflection, Tire Slip Velocities)

• Impacted Effects: Road Texture, Slide Texture, Wheel Spin, and Lockup Vibrations.
• The Change: These are tied to the new UI toggle. In "Zero Latency" mode, we use predictive math to pass the raw, unfiltered high-frequency data straight to your wheelbase.
• How it feels: The stiffness and micro-details are back. You will feel the exact grain of the asphalt and the sharp, immediate onset of ABS or tire scrub, without the signal being rounded off.

3. Driver Inputs (Steering Angle, Pedals)

• Impacted Effects: Gyro Damping, Stationary Damping, and Soft Lock.
• The Change: These channels are now hardcoded to Always Zero Latency.
• How it feels: The "thick mud" feeling is completely gone. Because the steering velocity is no longer delayed by 10ms, Gyro Damping will react instantly to your hands. Rapid counter-steering to catch a slide will feel crisp, immediate, and directly connected to the front tires.

[tororutsu]

I will try and find time to do some testing, IRL car repair has me needing a change of pace 😕

[leppie]

222 felt good. No more stationary oscilation issues, donut can still trigger spike, but it is only a temp one. I can live with that.

On thing I did notice was a reduction of effects after crossing the finish line/flag in quali in online race.

[coasting-nc]

@leppie but was it still reduced during the race, or did it return back to normal?

[leppie]

Was fine after. It was either a reduced effects state, or some effects didnt feel on (like bad FFB). It is not a big issue though I think.

[coasting-nc]

yeah if it is after the finish line and not while you're still on a timed lap, it's a minor issue.

[Newbie1982]

I am trying to figure out where can i report a log because I have the Moza R12 and it said Game FFB Blocked I even had the FFB in LMU turned off and had it at 0% i did however still have the invert ffb selected in LMU and I went to leave the pits and it went INSANE! I had to jump off my Rig and unplug it buit it was shaking so Violently that it moved my rig several inches over on the floor and its on carpet. I have never seen anything like that ever. I build houses for a living and I am 5-11 195lbs and far from weak and I could not hold on to it to save my life. I want to help because I believe in what you are doing and I want to make sure this doesnt happen to anyone else and also say Thank You for your Tireless and Probably often Unappreciated Work! So sincerely Thank You and Please let me know how i can help. Also can I have the Use LED selected and Use hardware display because I guess then it would still be interacting with my wheel?

[Newbie1982]

lmuffb_log_2026-03-24_12-05-59_Unknown_LMGT3_Autodromo_Enzo_e_Dino_Ferrari.zip

[coasting-nc]

@tororutsu @leppie
To prevent oscillations while driving at speed on a straight line, try this:

• increase Gyroscopic Damping ("Gyro Damping" near the end of the "Real Axle" section) to 10%. This should act as "hands off protection".

Recommended starting point: 10% to 20%.

• At 10%, the wheel should feel completely free at low speeds, but at 250 km/h, it will provide enough resistance to stop the wheel from violently shaking if the driver loosens their grip.
• Anything above 40% is usually overkill and will severely impact the driving experience.

Let me know if it works!

[coasting-nc]

Version 0.7.272 implements "Gated Gyroscopic Damping" which "gates" the hands-off protection so that it does not reduce details or responsiveness. The damping is only enabled in the straights (zero Lateral G), and there is a velocity dead zone, so that even small road details can be felt while in the straights.

Note: Gyro Damping will probably be renamed "Hands-off protection" in a future version to be more intuitive.

https://coasting-nc.github.io/LMUFFB/branches/fix-issue-511-smart-gyro-damping-839794560013170350/