Wii GH5 Guitar

Latency of an input from a Wii GH5 Guitar. Note that the GH5 guitars have seperate microcontrollers for handling the neck inputs and other inputs. This is why there are two seperate sets of data here. Note that the Fret inputs below are measured going via the main PCB, you can go here to get the latency information when the main board is bypassed.

Measured by connecting it to the microcontroller in question, and then sending a signal to toggle the Green Fret or Strum Up inputs, and timing how long it takes that signal to reach a target device over USB.

microcontroller	Pi Pico	raphnet wusbmote	Pi Pico
firmware	new		old
controller	Strum	Strum	Strum
poll rate	1 ms	1 ms	1 ms
min	0.83 ms	0.76 ms	0.54 ms
max	5.59 ms	5.02 ms	6.12 ms
avg	2.78 ms	2.88 ms	3.56 ms
stddev	0.92 ms	0.93 ms	1.06 ms
%on time	84%	83%	79%
%1f skip	16%	17%	21%
%2f skip	0%	0%	0%
%3f skip	0%	0%	0%

microcontroller	Pi Pico	raphnet wusbmote	Pi Pico
firmware	new		old
controller	Frets	Frets	Frets
poll rate	1 ms	1 ms	1 ms
min	2.6 ms	2.77 ms	3.49 ms
max	10.24 ms	10.37 ms	11.4 ms
avg	6.29 ms	6.59 ms	7.19 ms
stddev	1.45 ms	1.48 ms	1.58 ms
%on time	62%	61%	57%
%1f skip	38%	39%	43%
%2f skip	0%	0%	0%
%3f skip	0%	0%	0%

Note that in the below graph, you can click on legends to show and hide different controllers when comparing.