What this browser can see
Inspect the device lists the module's interfaces and endpoints, whether the vendor interface can be claimed - which is what says the driver bound - and what firmware it runs.
Measure the snapshot rate streams snapshots and decodes nothing. Fast here and slow on the simulator means the cost is in drawing them; slow here too means the transport or the firmware.
Nothing here changes the module, and it streams only while this page asks.
Send a MIDI clock
Clocks the module from this browser, over the MIDI half of the same cable. 24 clocks to the beat, scheduled ahead through Web MIDI rather than fired from a timer, so what the module measures is the tempo asked for and not this tab's jitter.
Set every input to — under
SYS first. A patched clock always wins over one that
is not even physical, so with a jack still in CLOCK mode this does
nothing and looks broken. Watch bpm in and bpm run on the
simulator.