Is there a way for a toggle to always be read without having its signal be updated?

Currently, using an HI device, I have a set-up where holding a button causing a toggle to switch on, and letting go causes it to switch off, and different buttons control different toggles controlling various sounds and whatnot.

Right now, all my toggles are going towards one general destination, so only one toggle's sound can be active at the same time. So, if I am holding one button, activating another will have the newest updated toggle be read, even if the last one is still active/on.

The problem I'm having is that, if holding down multiple buttons and thereby having multiple toggles on, I want it to be the case that letting go of toggles results in the toggles still being held to be read or activated. In essence, as an analogy to a real instrument, I want to do something akin to a "pull-off" on a guitar. I want to do something analogous to holding multiple frets on one string, where letting go of the highest fret causes the lower fret on the same string to sound.

However, Max MSP seems to not read toggles, buttons, etc unless they've had an update or bang signal sent to them, so a toggle turning off sends a signal, but not a toggle staying on, which is what I want to be read. In other terms, In a row of toggles, I want the right-most toggle that's turned on to always be read, regardless of order of toggle activation. How can I achieve this? Trying to have a button feed back into the button inputs to send a bang to update reading the messages causes a stack overflow error, so that doesn't work.