Variance in input lag makes rhythm games unplayable

[taboodles]

No hard feelings or anything, I am very impressed with this project. I just wanted to add a data point.

I've been using sys-con to use a Dualshock 4 controller to play Hatsune Miku: Project DIVA Mega Mix for almost a year now, and haven't had problems. The game has lets you calibrate lag, so any delay caused by the display or controllers can be mitigated if the delay is stable.

Even with several attempts at calibration, I can't reliably hit notes using the Dualshock 4 and MissionControl. Just based on my sense of rhythm, it seems like all controller inputs eventually register, but 20% of them get noticeably delayed.

Based on some googling, arcade rhythm games have a leniency of at most 50 milliseconds to get the best rating for each note. I'd estimate that to be an upper bound for how much jitter can be present for rhythm games to be playable.

[ndeadly]

Do you have nx-btred installed by any chance? Another user reported pretty much exactly the same issue as you and found that to be the cause of the latency #246

[ndeadly]

See if this does anything for you

MissionControl-0.5.0-alpha.4-no-tsi-stub-67deb90.zip

[taboodles]

Hey! That seemed to totally do the trick! I don't have any gameplay issues at all, and everything still seems stable. I did gameplay tests with the Switch Pro Controller, 2 Dualshock controllers, and my Joycons all connected simultaneously.

[ndeadly]

Cool! Wasn't really expecting that to work so that's interesting. This also didn't include the reporting rate limiting so seems it's purely because of this function. I guess I'll have to work on only blocking this command on controllers where it causes problems. Thanks for testing.

[ndeadly]

Also, FYI that build above in its current form will break connectivity for Xbox One and Gamesir controllers as they can't handle that vendor command (that was the reason I blocked it in the first place)

[ndeadly]

This fix and the controller report rate reduction are both included in the new beta release I made just now. Hopefully that's the end of your input jitter :)

https://github.com/ndeadly/MissionControl/releases/tag/v0.5.0-beta

[Masamune3210]

I would rebuild your card manually without using any pre-packaged setups and test again, they tend to cause more issue than good as it's entirely in the air as to what is installed as their "defaults"