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Great thanks for your reply.
I have no knowledge about what api Steam uses. 
I have been played with HIDAPI, Raw input, Windows.gaming.input, but gyro sensor can be detected when only HIDAPI is included. 

So far no difference in result on HIDAPI alone or HIDAPI + Raw input , and so on.  :( 

I wish I could capture gyroscope signal by Raw input alone. 

yeah, I have tested while Steam client was off.

Thanks for suggesting SDL3. I will definately look for it. Also at the moment, I might also try USBPcap + Wireshark combination which seems capturing data without HIDAPI, hopefully it's not that difficult, and able to grab.

But apparently your amazing app still helps to solve my interest. 

Thanks!

Hi! First of all, thanks for making great app to test game controller.

I have been analyze game controller's gyro drift and bias and its jitter via Steam's console command, "gyro_drift_calibration_debug 1".

and I tried to command also "gyro_raw_deadzone 0".

From there, I have gotten "New Gyro Antidrift value found: ( -0.254136, -0.052945, -1.063534 )" for more than 2 hours and create graph out of it. So far, I have tested, about 10 difference controllers, and most of them have some sort of gyro drift over hours either slight or stiff tilt. 

And I found this app and end up purchase it since it gives alot of data and create CSV file!.
I was excited to see more detailed gyro data to analyze better. But it seems all 3 game controllers that I have tested so far from Powgames GameConTest app, have no gyro drift at all.  all 3 controllers' data seems very static, unlikely data from Steam command.

 
So, I am wondering what can be the reason.  whether steam's gyro calibration process somehow bias the data if it is long period of time (1~3 hours) or your app has some kind of calibrating process (even though I don't think it has).

I attached graph from steam command , and graph from CSV by Powgames GameConTest app.

Any advice to analyze gyro data from your app would be very appreciated!