From 6ae198bafc3842a2f695320d6d230144441afcea Mon Sep 17 00:00:00 2001 From: Neale Pickett Date: Mon, 15 Jan 2024 09:15:13 -0700 Subject: [PATCH] mention USB data rate --- docs/tech-notes.md | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/docs/tech-notes.md b/docs/tech-notes.md index c0a5e35..24a5c0e 100644 --- a/docs/tech-notes.md +++ b/docs/tech-notes.md @@ -7,6 +7,35 @@ so that when original sources fall off the net, hopefully at least my notes will still be around. +USB data rate +------------- + +Unlike the Santroller +(which is much easier to install for beginners), +this firmware does not send continuous updates over USB, +unless it has to. + +Because the only analog input is the wammy bar, +if you don't include that input, +the controller can stay silent until a button is pressed or released. +This allows 4 controllers to connect to a USB hub, +with no concern for overwhelming the hub. +Since the amount of data is about the same as a keyboard, +and a little less than a mouse, +I would expect that a 7-port USB 2 hub would also handle 7 instruments, +no problem. +I just don't know of any games that can use mor than 4 instruments. + +If you do use the wammy bar, +an update is sent every 20 milliseconds. +The firmware still attempts to reduce lag +by sending button change events as soon as possible. +I haven't played with this much, +so if you have a wammy bar set up, +please reach out to me and let me know how it works. + + + Sample Rate -----------